You're missing something very important. UPS batteries are deep discharge cycle type batteries. Car batteries, aren't. Car batteries are made to never discharge too much, while providing very high CCA (cold cranking amps), something a UPS will never need. On the other hand, UPS batteries are built to have lots of deep discharge cycles. The physical difference is the amount and shape of the cells inside each type of battery. So yeah... it works but the car battery will only last a couple cycles, kinda expensive... Don't do this
UPS batteries..... unless you use LiFe batteries are not deep cycle batteries at all. they are simple sealed lead acid batteries they are NOT designed for deep discharge and recharge any more than a lead acid car battery is. These are not even close to the same as a deep cycle battery use in boats or RVs etc. I recondition these batteries if theyre not too badly damaged so I know for a fact that a straight 12 volt 18Ah battery is not a deep cycle battery. It is nothing more than a motorcycle battery.
@@dalefeekes313 wrong. check the datasheet of for example any 12v 7ah sealed lead acid or gel battery and compare the amount of deep descharge cycles it can withstand against a common for example 85ah car battery. the stats are there. to get the enormous CCA vehicles need, the batteries are made different. another example is you can't get near half of the CCA putting 10 7ah batteries in parallel compared to a single 70ah car battery. I get your point with the specific "deep discharge batteries" but thats kinda marketing snake oil, they're actually very similar to UPS or moto batteries
Great video, I've been wanting to do this for a while to ensure my internet and router don't go down during a power outage. My recommendations: Use marine/deep cycle batteries, battery boxes, and maybe storage container to consolidate (portable?) the system. For the preppers out there, it would be interesting to see how to recharge this system using solar panels only. Cheers.
@annestywest7488 I bought a Cyberpower cp1500pfclcda 1500va 1000w sine wave battery back-up system it has 2 9AH batteries 24v so I added 2 100AH sealed lead acid batteries 24v but it can't see that I added more AH to it and at 207w it only runs 44 minutes then shuts off but the batteries are still at 24.5v when it cuts off. Can I hack the system to change the settings? Maybe I should just buy a power inverter to run my things?
@annestywest7488 sadly some ups models do not actually check the voltage of the battery to deteemine runtime, they just have timers based on the load. I had an Eaton like that. I don't think you can change the ups settings.
Question, did the UPS built in battery level indicator eventually begin to accurately represent the new battery levels? How long did it take? EDIT:Typo
@@UltimateDIY Yeah, I am thinking about buying a refurbished UPS and adding an external battery bank to it to run the modem, router, security cams, NVR and charge laptops and cellphones. Should be a constant draw of about 40 watts(without laptops and phones), which should give me about 1 day per KW, maybe 20 hrs with system losses.
Many people concern and diaagreed ...why need to modify the UpS instead of buying ready made sold online and in many hardware store....so my answer is...this project is thinking out of the box...many inverter sold came with no spark fuse..event they built in fuse..that does not protect the unit board..once its sparked..the whole unit became unuseable...throw away...i came here after my inverter unit was damaged/blown...this make me think how this UPS work...there is many UPS was thrown away after the built in battery died..not many people known thay the battery is replaceable...thank you admin..you inspired many people in the world..keep a good work..keep post it..
you should realy use marine battery or solar battery becouse car battery is designed to deliver high amperage in small bursts but marine and solar battery are designed for draining compleatly
Yes, but modern UPS have a low voltage cutoff, so car batteries won't get damaged directly. However deep cycle batteries can do much more cycles before a drop in capacity than regular car batteries. In the end, car batteries lasts much longer during an outage than small UPS batteries.
Bill is right, you need to keep the same battery technology unless you want to go and reprogram the new float voltage and also I have done this before, but ended up charging the battery array externally as the internal battery charging circuit is designed for small capacity battery banks (No more than 36Ah and considering the SUA1500 has 2 x 17-22Ah gel cell batteries in them anyway) I ended up having an external MPPT 24 volt solar setup that charges the batteries and I just switch it on when I need mains power and off when I do not. Additionally if your pushing the UPS output past 930 Watts for long durations (this is based on the 1500 VA variant, the transformer can overheat quickly and kill your UPS. Stay under 500 Watts as a constant load and it will run for past 10 hours without any issues if your battery bank is big enough. With an external Charge controller, you can let the battery float to whatever the battery technology you purchase is. Remember that long durations of just charging will make the batteries lazy when you do throw a heavy load at them, so remember to calibrate the UPS to the batteries ...oh and disconnect that blasted buzzer! If you want to get more grunt out of your UPS, adding extra FET's to anything other than the base model (4 FET's only) gives hardly any improvement except a slightly better surge capability. I ran 2 x 100Ah batteries on a 50 Watt dual solar cell MPPT for my remote shed. I got over 6 hours of 360 time before the UPS started hinting it was running low, so I just switched it all off and 2 days of sunshine later....another 6 hours again If you do want a bigger max load output, alas the 1500 is 24 volt, but it then goes up to 48 volts for the 2200 all the way up to 5KVA. The 5 KVA and up models go to 96 and then 120 volts... The longer your cable run, the bigger the cable will need to be and especially if your going to mode a 1500, change those DC cables for 2 Gauge as running a 750 watt load for more than 20 minutes will leave you with the insulation starting to melt! 4 guage at a push ... DO NOT FORGET THE BATTERY ISOLATOR, FUSE THE HELL OUT OF IT AND DO NOT LEAVE IT UNATTENDED WHEN YOU FIRST FINISH IT UP!
@@UltimateDIY the lead-acid AGMs in stock UPS, marine batteries, and car batteries are all lead-acid, all work the same way, all have the same charging voltage thresholds. The difference is that the UPS charger cannot supply as much current as a big charger can. If the UPS charger is stupid and is relying too much on the internal resistance of the 7AH pack for current limiting, it will overhead because it's trying to deliver too much current for a long time. Minimal quality UPS are smarter than that and current limits to protect itself even if the battery is shorted. The only real advantage to having an external charger for your bank is that the external charger will charge at a much higher rate than the builtin UPS charging circuit can. IIRC, the optimum charge rate for a lead-acid battery is about .1C, where C is the capacity in AH. So a 7AH battery *optimally* charges at .7A, and will take about 10 hours to charge 100%. You can take it as a given that UPSs target somewhat less than 10 hours. Say 5 - .2C. Meanwhile, a 250AH truck battery wants to charge at 25A for 10 hours. No consumer UPS is going to charge remotely close to that level, and even at the 7AH's double-optimum rate, it'd take over over 5 days to charge. Reprogramming float voltage et. al. would only be needed if you changed to a different battery chemistry. Like LifFePO or NiCd. But you're not. You could potentially rig up an automotive charger into a UPS to charge the backup battery automatically, but that' would require rather more surgery on the UPS.
@@fromagefrizzbizz9377 There is a small chemistry difference between car lead-acid batteries and the deep cycle lead-acid batteries. I think car batteries lead plates contain some barium alloyed with the lead. It is possible that some have calcium alloyed with the lead. As you use the battery, the lead sponge on the anode (negative terminal) turns to PbSO4. At the cathode (positive terminal), the PbO2 (spongey PbO2) turns to PbSO4. The purpose of the barium or calcium is to prevent the formation of large PbSO4 crystals. In any case, once you use the battery too much, too much PbSO4 covers the plates and it is hard to recharge it. The purpose of car batteries is to give high amperage (100 A to 500 A) for a short period of time to just turn the engine, which is why it uses the high surface area spongey lead and PbO2. In the case of deep cycle batteries, the plates aren’t so spongey and can’t give high amperage. The plates aren’t the high surface area type.
You can adjust float voltage using SM protocol in hyperterminal. Plus charging can be boosted upto 14 Amps in 1500VA model by solding a resistor on board. Transformer will heat up but you can install better fan to cool it down. You can easily run 2 100Ah batteries by doing that without any additional charger or anything.
I like the video and the concept of using larger batteries for your ups backup units. You must realize that ups inverters are not very efficient and the chargers are not a high rate charger. A 1500 VA ups can only run 500- 700 watts for long periods. The low volt amperage is 25-35 amps @ 24vdc for 120vac output. this translates to 2-3 hours of run time max. The 2 amp charger will take 2 days to replace this charge in the batteries. Also realize that the inverter will not switch on if the power has already gone out and the ups was not plugged in at the time to mains. A ups uses the mains to sync ac hz on mains and then switches inverter to match. If you take a fully charged ups out of the closet and turn it on to provide backup power nothing will happen as it has no mains to sync to.
I though the same, but it seems at least this model is able to power on, even if it was disconected before the power is gone. If I remember right, I added this info as a text somewhere almost at the end of the video. It is not happy to power on like that, but it does :) Not sure about other models, though.
Nice video to watch and learn. But I am just thinking. Aren't UPS built for emergency saving your work and eventually you need to use the generator? And isn't it better to use instead an inverter if you really need power from a bettery? Just my thoughts.
Che fach, muh. I recognize that accent. My grandparents were from Alba Julia and came to the USA in 1932. They spoke Romanian at home but they forbid each other from speaking anything but English outside the home. I learned a few words and phrases but that was 60+ years ago. Great job on the UPS!
Hello sir, I have contacted UPS with 35ah Amron car battery. I have checked that 35ah full battery provided approximately 4hrs backup for 200 watts load. But I am using my laptop with wifi during backup time UPS automatically turned off after 5 minutes of backup instead of long time. If turned on again then also turned off after 5 minutes. It's quite difficult to use please give me a solution. Thanks in advance.
Hello. Sorry, but it's not about a universal sollution. Each brand and model of ups bahaves in a different way. Some can even be set up by connecting to a pc with a dedicated software. If it always shuts off after 5 minutes it seems to be on some kind of timer.
Excellent setup and clear instructions, I like to stress to viewers that you need to pay attention to the transformers and validate they can handle the load.
I use a old 1500 volt amp...(1500 watt) ...APC brand UPS that was thrown away to power up my modem, WiFi, TV, clock and the modem cooling fan when the power goes out. The total load is 363 watts so there is plenty of reserve in the UPS as this is only 1/4 rated load. I added a 55 amp hour power wheelchair SLA sealed lead acid battery to extend the run time. This system has been on line for 3 years with no attention needed. I added an LED volt meter that is constantly on so I can see the battery health in a glance. Its better to have a larger UPS running at a lower load than rated.
Exactly. The number of batteries in parallel can be any, but it is important to warn the audience that the UPS has the power indicated on the label, which it can supply, such as 350W. In practice, about half to 75 percent of the power consumption is used, ie about 175-230W. This means that you can power devices that have a maximum power consumption of up to 230W. If someone powered devices that have a higher consumption, a Bosch battery up to 100Ah would certainly be able to do it, but the UPS transformer will not be able to do it and it will burn with all the electronics. This is called overload and the UPS transformer really can't handle long-term overload. The author of the video has to be very careful about that, and so do the viewers.
I did this a LONG time ago using deep cycle batteries from my wife's power chair. I had a relatively small APC backup and two deep cycles in parallel. It gave me (according to the reporting software) something like 1 to 2 hours. First test seemed to be accurate. Rarely used it, but I did note the tiny backup took a LONG time charging them up again. Our power here is usually very reliable, the batteries leaked a bit after a number years of disuse. Tonight I was in the middle of something semi important and power went off. Hmph! I had just read a How-to-Geek article on having battery backup for your router. Yea! Was VERY surprised that even $300+ backups were reporting less than 30 minutes of half load time.
You used inverter much better give you much better battery time ok those things batter eater no joke i have one i have have 5 inverter 500 watts,800watts,1100watts,1500watts and 3000watts inverter much better
giving power is OK - but I have a question regarding charging the car battery: charging is done in known conditions suitable to the original battery. You might have a problem with charging current to the car battery, am I correct??
The reason why the cable didn't fit through the groove is mainly because of the insulation to copper ratio. Mains cables are double insulated (at least European is or should be) which adds to the diameter even if there isn't a lot of copper. The cables designed for connecting to batteries don't have as much insulation and have a ton more copper for higher current.
Hey. It still works, but it was left unplugged for a long time at a point and one of the batteries overdischarged to a point that the ups refused to charge. So it needed to be charged with a car battery charger. Now it's working again, but I suspect the capacity of both batteries has dropped over time.
the problem of extending an ups with batteries of greater capacity, is the UPS is not designed to work for such a long time, and less if you connect a computer that costs at least 300w, the transformer that it has at some point will burn, if the ups have no over consumption protection
I have a 330 watt APC BE600M1 with a 140 watt load. I hooked to a deep cycle lead acid marine battery to the UPS battery wires with the UPS battery still installed in the UPS. It wouldn't work at all powered by the marine battery unless the UPS battery was still hooked up. . The marine battery is supplying 12.5 volts to the UPS but it pretends like it isn't even there and shuts down in 15 minutes same as it does without the marine battery hooked to the wires. I don't understand why? I Googled bosch S3 012 specifications. It said "wet" I assume that means it's a lead acid battery. Is that correct? So your UPS works good with a lead acid battery. Mine should also I guess?
Some units don't check the battery charge level, but only set a predefined timer. It seems yours does that. Probably there ia no way to make it last longer.
Hello bro. I have an apc 1500 i connected 2 cat 210ah batteries in series because it works with batteries in series. I previously charged the batteries externally but when i conmect them to the apc it always says low charge... dunno why. And connected a 1500w computer and apc shut down.
Hello. The part with the charging is a bit weird, but where did you get a 1500w computer from? An apc 1500 will output maximum 1000w, so anything above that will force shut it down.
I want to use an amplifier 2sc5200(4 MOSFETs) in car.does a ups work properly. And I also have done that idea but couldn't find success because ups goes to automatically off. Please reply... thanks.
Hello. I have a question. Your external Battery Cables are approximately AWG 6. But after the connector, your original UPS cables are more like AWG 10 or 12 only. Isn't that dangerous? I am ready to copy your concept with 2 pieces 50Ah batteries but also my original UPS battery cables are only AWG 10 or 12. Is it safe?
The 24V fan is annoying as hell in these ups, the problem is maybe the ball bearing, is a monster fan, you can try to change to a more silent, i recomend you adding a 12v external fan, big like PC fans silent and constant to mantain all cool when it charging.
I have a query about 1200va ups (APC), how much amp hr battary can be install / support. Existing battaey into: 12 volt 9ah. I mean, can i use more AMP HR battary, for UPS works fine / without any harm to internals of UPS, to increase backup hours ?
It is impossible for me to know for a model that I have not used. Usually if it has active cooling (temperature controlled fan) it should be ok. As fot the battery capacity, the bigger you use, the longer it will take to fully charge. Depends on your needs.
They were recently replaced, bacause the UPS was left disconnected from mains for a few months, but still connected to the batteries. This completely discharged and damaged one of them.
About can I deliver sufficient power for one pc without peripherals and one pc with a monitor (i7 9700k 3070 Nvidia with 700w power supply) I'm looking for something like this because in my country in summer we suffer alot with power loss
Ash I see I have a 360w meccer ups, connected to a 100ah battery, but I put a separate charger, do you think the ups onboard charger will be sufficient?
Im using car battery and ups BR650CI-AS but the outpot power of ups is 180v ac only running with the battery insted of 220v ac her in the philippines if i using power line the ups output is 220 vac with battery. Do you think what is the problem?
You should have used ring terminals for larger gauge wire, the blue insulated are for 14-16 gauge wire,I believe the ones with yellow insulated for 10-12 gauge would have been the correct size. When connecting to the battery terminals you could have just used ring terminals connected to one of the screws which tighten the cable connection, this would have been more secure than your bundle of wire. Also, if you change the battery orientation so that you have a positive and negative post at each end the UPS connection will be at one end, the fuse at the other end.
I've found APC Smart-Ups 3000VA for really cheap, the problem is that it uses 48V (12x4 in series) battery, i got a car battery of capacity >336Wh (336Wh is 12*7*4 of stock), could i use boost/step-down converter to use that battery in that ups?
I don't think you can do it, without extensive modifications to the ups. You should disable it's charging circuitry and only use it as an inverter. But enen then, it would probably never know the real charge state of your battery and you might over discharge it.
De ce ai pus in serie? Nu ar trebui oare sa fie in paralel, sa crească doar amperajul? Din cate stiu in serie creste voltajul iar in paralel cresc amperii.
The UPS was designed to run (X) min at full load. now you are capable of running it 4(X)min at full load. UPS will probably overheat or electronics/transformer fail, what have you done about that?
No, it will not overheat. This is not a low price ups with passive cooling, this has a temperature controlled fan and the fact that the batteries are no longer in helps even more, with better airflow and no heat generated by them.
@@UltimateDIY Partially true. The UPS may have temperature control, which means it can protect itself from damaged but that doesn't mean it wont overheat. you may have slowed down the temperature rise by having an empty caucus, but it can still happen. the fact is that the inverter components where not designed/chosen for that extended run time at full load. things like transformer insulation, sink pastes etc. I've done the same with my UPS and this has always bugged me.
I do not think any of the components are unable to handle the extended load time. I would agree with you if we were talking about a unit designed to run for 10 minutes at full load and I would extend that at 2 hours for example. But in my opinion this unit even with standard batteries already has enough time to reach maximum operating temperatures on all components, so they are designed to withstand that.
@@UltimateDIY It not about reaching operating temperature, it about extended exposure to that temperature. the design safety factor may have been limited by the maximum possible operating time of (X)min based on batteries of (Y)Ah. you are now using 4(Y)Ah batteries and thus capable of exposing those components to that temperature for 4(X)min longer. there is a possibility of premature deterioration of the components. Even if you look at transformer or generator specifications, they will tell you for e.g "that this unit can run at say 80% continuous and 100% for (x) amount of time". Anyway, all im saying is that this is something you should think about and not dismiss because there is active cooling. since it was a SEALED unit with a defined and finite possible maximum operating time (Due to battery size), the designer could have chosen his components and he cools them within those known limits. it would be a different story if this was a stand alone UPS with external battery connection, and i bet you then that the designer would have mentioned either a max Ah battery to be used or provided a time vs load chart.
I understand what you say, but I do not consider this to be such a big risc. If you use the unit at max a lot of time, that is another thing. In the use scenario this particular unit was modified for, it will not see a full load, but something like 25% to 50% maximum, so this makes me confident it will survive.
Guys, I have APC SU1000XL, which goes with additional battery pack extender input from behind. Does internal and external batteries are charged separately? E. g. can I use half dead batteries as external extra battery pack along with new batteries inside, without risk of reducing lifespan of internal batteries?
I have replaced the 7ah battery to a 40ah car battery in my 600va UPS. The battery is fully charged. But I am not getting any extended backup time. The UPS turned off within a minute. What may be the possible cause? Appreciate if you provide the solution for it. Thanks in advance.
Ultimate DIY yes the battery is new. I even charged it for around 40hrs. What I have noticed is when the UPS turns off. I again make it on and it once again runs for a minute and goes off. This means the battery is not drained. Anything else I can do?
Ultimate DIY Even I am suspecting that. My old battery runs for about 1-1.5 min, and the battery drains off completely. But here with the car battery It turns off faster and the battery remains charged. Also one more thing my computer load is 450-500 watt. And 600 VA supports only upto 350 watt, I read it in its label. Does the car battery work with higher VA rated UPS? Without getting switch off. Or can I connect this battery with high rated inverter to keep my computer on?
You are overloading the ups. I'm actually surprised it does not instantly turn off. On a 600va ups you can (in real life) put only about 250w of load, especially with a long run time given by a high ah car battery.
Great setup, you have skills. I have the same idea to do something like that. I wanna disconnect the 230v main and charge from solar. That way i can use it as a backup power-supply for fridge, computer, fans etc. I do not wan't mains connected all the time. 30 Watt solar panel can charge my mini UPS with 12v 7A battery (Real 3.5Ah) in less than 3 hours. I also have a 230v - 12v battery charger + trainer at 12v - 1A and does it also within 3 Hours. Because Lead-Acid batteries have a discharge cut-off at 50% capacity they charge quickly from 50% to 100%. Basically your 88Ah - 24v (2x12v) Car battery backup unit has only 44Ah - 24v capacity = 1KWh of real capacity to use with the UPS inverter. If your UPS charges at 10A it will do so in 4 hours to 100%. These old inverters from the 1990's have a very low efficiency, probably 75% or less at high 230v loads. So you lose another 250Wh of capacity to conversion & heat and end up with only 750Wh. Not to bad for a shabby 24v car battery that cost probably $120 or less. You do have to be aware of gasses. Regular maintenance of the battery is required like with your car. My Mini UPS has a few (4) switches on the back to set cut-off voltage and acoustic alarms at different loads (voltage drops), e.a. 160v, 172, 184v and 196v at either 50Hz or 60Hz meaning you can (un)safely drain the 12v Lead Acid down to almost 20% making it compatible with expensive deep cycle gell types, if i am right? Maybe it is just a security threshold voltage when the backup battery kicks in to protect delicate electronics like your PC from surges or dips without power loss?
Salutare! Mi-ai rezolvat problema UPS-ului de la centrala. Am urmarit toti pasii. Am sarit totusi peste unul (n-am avut canal-canalet de cablu si am folosit o bucata de teava gri de scurgere ca sa bag conexiunea cu siguranta dintre baterii). Totusi indraznesc sa intreb cum se comporta bateriile auto, dupa doi ani de folosinta? Multumesc anticipat!
Salut, cred ca vorbesti romana. Am facut ceva similar pe un UPS de la Njoy de 600VA. Am legat-o la o baterie auto numai ca pe plus i-am pus o siguranta de 20A pe care mi-a ars-o la prima incarcare. Cred ca nu am luat in calcul ceva. Am crezut ca e aparatul stricat si l-am lasat deoparte. Acum cand vad filmul tind sa cred ca nu am luat in calcul ceva de mi s-a ars siguranta aia. Pot sa las firul fara siguranta sau sa ii pun o siguranta mai mare?
Salut. Din pacate, fara sa vad ce e acolo nu pot sa ghicesc. Fara o incarcare serioasa pe ups, nu ar trebui sa se arda aiguranta de 20A. Daca pui una mai mare si e ceva in scurt, rist sa strici altele.
@@UltimateDIY Am un ups cu o singura baterie. Am bagat in el cam 350-400W. Nu a fost nici o problema. Am scos din priza UPS sa vad daca duce singur cu bateria si cat timp. In 15 minute bateria a murit. (bateria nu e noua, e posibil sa fie stricata, am luat-o de la un amic care voia sa o arunce dupa ce a stat vreo 2 ani in beci). Dupa ce s-a golit bateria am bagat stekerul in priza sa incarce bateria si dupa 5 minute am vazut ca nu mai incarca. Nu eram langa el cand s-a ars siguranta. Nu mirosea nimic dubios in camera.
Indiferent unde pui siguranta pe circuitul bateriei, ea trebuie sa existe. Eu parca am pus-o intre baterii. Nu as lega fara siguranta, pentru ca risti sa dai foc la ceva. In timpul incarcarii sa puste siguranta de 20A nu e normal. Nici nu poate baga ups-ul atat in baterie. Ceva sigur s-a pus in scurt. Vezi ca bateria e posibil sa fie praf.
Why not mount the Anderson plug on the outside of the case? Then you can disconnect the batteries if required without having to worry about insulating the terminals.
Thank you for watching. I don't have enough experience to recommend anything. Just keep in mind that the more Ah, the slower it will charge to maximum. Also, the more Ah, the better the cooling on your ups must be, to be able to handle longer battery run time.
Great instructional video...The question is, if you use batteries like the marine or telecom batteries, how would you know if the UPS charging circuit will be able to properly trickle charge these batteries?
@@UltimateDIY Ok thanks. I googled APC UPS 3000va schematic and i got a 6page pdf document with schematics...so i will review and look for clues there.
@@UltimateDIY sorry next question if you don't mind. Can a battery charger be added to a battery bank and stay connected even if there is load on the battery or does it have to be switched off ?
Thanks! The cooling capabilities depend a lot on the particular ups model. I am not familiar with yours, but if it does not have a fan, I would add one, just to be safe.
Mi se pare absolut genial cum ai un vocabular impecabil in limba engleza (mult superior unor vorbitori nativi) si accent balcanic puternic. You could be the best russian spy in america, ever.
Nice video, will this car battery work for my setup below. With a load of 300 watts. 1. 1500 watts 24V Inverter. 2. 80ah x 2 car battery. 3. Can I use this setup every day with 3 hours run time during power cut off. 4. Will this battery last up to 1 year of usage. Will appreciate it a lot if my questions (4) are answered as cost is an issue.
@@UltimateDIY In fact lead acid batteries can work on much longer ups systems. Because modern UPS systems do not go below 12.5 volts to keep battery life long. thus, they do not go below 20%, which is critical for a battery. In this context, it is more accurate to use lead acid batteries in modern ups. Because gel batteries have a price tag almost 4 times higher. With the same budget 4 times more amperage lead acid battery can be bought.
@@UltimateDIY New generation UPS systems do not reduce the battery to less than 12.5 volts. This makes a standard battery run like a deep-cycle battery. Even if you buy a gel battery, the new generation UPS systems will not use this battery to the bottom, it will stop the operation at 12.5 volts. So where's the advantage of buying a gel battery? And 4 times more expensive. I want to take my claims a step further, the old type wet batteries, bumper cover is better. periodically interferes with water and acid levels. This extends the battery life more than expected.
Ups has an eprom similar to those, found in laptop batteries. To upload its contents to the pc, you may need to do the same as with laptops. 10 discharges in Windows, 1 discharge in Bios (must be about 45 min). In bios, each discharge will enable one option, that may be off by default, when you buy the device. That will enable lower fan speed, less heat, higher performance, and less cpu usage. To achieve this, you may need 10x 11 discharges, depending on your computer’s health.
Salut, Am un UPS Cyber Power UT2200E 1300W si vreau sa-i pun 2 baterii exterioare. El lucreaza cu 2 la 12v7Ah, deci 24V 7Ah. Vreau sa-i pun 2 Ultracell pe Gel la 100Ah, o sa am 24V la 100Ah. M-am informat si am primit raspunsuri gen ca strica bateriile sau ca arde placa electronica a ups-ului pentru ca el incarca la curent mic pt baterii de 7Ah si daca adaugi baterii mari va fi solicitata placa si va ceda. Am urmarit diferite clipuri in care am vazut ca e posibila incarcarea bateriilor mari de catre ups, am vazut ca ai reusit si tu, nu am gasit modelul meu de UPS exact asa ca nu stiu daca o sa mearga si la mine. Daca ma gandesc logic, si as lua exemplu un redresor de baterii auto care scoate 7Ah si poate incarca o baterie de masina de 150Ah si nu s-a stricat, as zice ca e posibil sa functioneze. Astfel, te-as intreba si pe tine sa imi spui daca crezi ca ar functiona pe modelul meu de UPS. Acesta este UPS-ul meu www.cyberpower.com/eu/en/product/sku/ut2200e Multumesc.
Salut. Nici eu nu inteleg logica celor care zic ca se strica. Singura explicatie ar fi ca vorbesc despre unitati de o calitate scazuta cu electronica la limita. Eu consider ca o sa iti mearga.
@@UltimateDIY Merci pt raspunsul rapid. Tocmai am vizionat un clip cu un CyberPower montat pe o baterie de 300Ah facut prin 2015. Inca ar functiona dupa 2 ani. Am sa cumpar bateriile si ma apuc de treaba. Merci din nou.
What is the spacific UPS you are using? it looks like APC SMART-UPS SUA1500I. I can buy that one used without batteries for 40 euros. Is it worth it? Can I use it with a car battery like you. I just need one car battery. I want it for my 3D printers and PC.
Sadly, I don't remember the exact model. It might be specified in the video at some point. The price is good at 40e. You can use it with car batteries, but you need two in series. It does not work with only one.
I do that on an APC Pro 1500 (24V), but I used to do that on a TrippLite Smart 100 LCS which was 12V and only required one car battery, the problem was that it could only output 500W and it couldn't run my fridge, so I guess that wouldn't be a problem for your printer and PC.
The reason for it not turning on if it previously did not get AC voltage at its input is, for one, that the AC the UPS creates must be in phase with the line AC. Primarily the required clock signal comes from an active line AC voltage. Secondly, safety.
sir i use this method with APC 1500 with 65ah kung long batteries but ups gives me just half hours y? my batteries are new and they both have perfect health. i only use computer complete desktop set up. cup have 550 watt psu, 19 inches led, mouse, keyboard and headphone just
There are a few variants: - your PC uses more power than you think; - you are making your calculations with the full capacity of the battery, but the UPS will never drain it to 0%; - I do not know the brand of the battery, but it might simply not have the rated capacity; If my aproximations are right you should be getting 2.5 hours of use, but this is a really ruff estimation as I do not know what gpu you have and how you use your PC.
Do you ever smell the gases from the batteries? The charging of lead-acid batteries can be hazardous. However, many workers may not see it that way since it is such a common activity in many workplaces. The two primary risks are from hydrogen gas formed when the battery is being charged and the sulfuric acid in the battery fluid
Never smelled anything. I think modern batteries that are in a good condition release really small amount of gases. My car for example has the battery in the trunk, which is directly connected to the inside of the car. They would not have done that if the risks were too high.
Agree - wet cells should not be used indoors without a vented, explosion proof container. I have a nice RV charger to use for ham UPS nut mt wait to but the $$$ AGM battery.
I've been using a car battery with a 600 APC for a while, but the UPS evidently runs on a timer because I only get about 15 min run time before it shuts off, and the battery is still over 12.1 Volts...
@@UltimateDIY sir im planning to do this build. My car battery is a used but still in good condition and still has power. What will i do after im done? I will let the ups charge the battery 1st or i can plug already my pc unto to the ups after?
Great video. thanks for sharing!. I want to ask, i have a ups 550VA (330W) working with a 12V 9Ah AGM battery. Can i extend by adding parallel another one to increase the capacity?. The thinking is to add 2 x parallel 12V 7Ah so will be after 14Ah. Only to provide more backup time because the 12V 9Ah is more expensive than a 12V 7Ah and i can find easily good batteries in 7Ah or 7,2Ah. Thanks
Hello every one, this UPS, is it able to charge that big car battery without struggling, And what is the value of the charging current if measured, Is it limited or controlled...
Battery ups , of any size , are only meant to run the system just long enough for Generators to come On line . Battery ups were never meant to run the system for many hours or many days . ( without a Geenerator , what is one to do ? ) get a larger capacity battery . or to run the system just long enough to manually shut down the system and wait for power to be restored ( typical home scenario )
I have an APC Smart 1000, and I did upgrade with car battery but it shows time remaining of old battery's(shuts down after 22min and the battery bar is low but the battery's are fully charged), my load is 150-220W
Try to find the software disk and interface cable. If you talk to the UPS with their little program, you can tell it it has new batteries, and it will behave differently. You can even cycle them through a self-test diagnostic from there.
Yes, my friend is still using it. But he did a stupid thing at one point. He left it disconected from mains with the ups powered off for a few months and one of the batteries got discharged so much that the ups could not charge it again. It needed to be charged on an old car battery charger. Now it's working again.
@@UltimateDIY can you sent me the link of the specifications please, i will be very thankful to you, I'm thinking to buy the ups for our office, thanks
The UPS needs a mains connection to charge the battery and to sense the presence of mains so that it can turn on when needed. You can always supplement the internal charger with solar panels simply by connecting a suitable supply directly to the batteries.
Hi. You want to determine the power factor of the unit while it is charging the batteries? Or the output while you have something plugged in? I would just buy a plug in power meter. Most of them show the power factor.
I part own a wireless ISP did this on a few UPSs for our tower sites the 7 amp hour battery's just do not live long in those metal sealed boxes with the switches and power injectors to the power over Ethernet radios heat and cold kills them in less than a year I just made jumpers out of 10 gauge wire with terminals to match the UPC brand units removed the 7 amp hour batteries from them of course ran them thru the weather tight boxes with grommets to boat battery boxes from Wal Mart ive used every thing from a garden tractor battery up to a pair of deep cycle trolling motor ones to get 24 volts for the bigger back ups all have a lot longer life and power the UPSs for many hours when the power fails .
SeaLife TT have had one quit charging but we think it was a lightning strike that did it in also putting in a vent on the box side with a PC fan helps keep the ups cool the vents for boat bilges work well facing down with screen between the vent and sealed box all sealed with silicone to make them water tight and keeps the wasps out of the box . Yes I put a fuse inline too just in case .
Considering APC are one of the best UPS manufacturers I always have a facepalm moment when you look at the H bridge heat sink..... Why the heck to they place the electrolytic capacitors right next to the heat sink ??? Seems crazy to me !
If you like the battery quick release terminals, you can get them here: www.banggood.com/custlink/GvGhrEMdHk
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Can i power up a hi fi playing Florin salam with this?
That is the ideal use for it! 😂
You're missing something very important. UPS batteries are deep discharge cycle type batteries. Car batteries, aren't. Car batteries are made to never discharge too much, while providing very high CCA (cold cranking amps), something a UPS will never need. On the other hand, UPS batteries are built to have lots of deep discharge cycles. The physical difference is the amount and shape of the cells inside each type of battery. So yeah... it works but the car battery will only last a couple cycles, kinda expensive... Don't do this
Yup, agreed 👍🏻
UPS batteries..... unless you use LiFe batteries are not deep cycle batteries at all. they are simple sealed lead acid batteries they are NOT designed for deep discharge and recharge any more than a lead acid car battery is. These are not even close to the same as a deep cycle battery use in boats or RVs etc. I recondition these batteries if theyre not too badly damaged so I know for a fact that a straight 12 volt 18Ah battery is not a deep cycle battery. It is nothing more than a motorcycle battery.
@@dalefeekes313 wrong. check the datasheet of for example any 12v 7ah sealed lead acid or gel battery and compare the amount of deep descharge cycles it can withstand against a common for example 85ah car battery. the stats are there. to get the enormous CCA vehicles need, the batteries are made different. another example is you can't get near half of the CCA putting 10 7ah batteries in parallel compared to a single 70ah car battery. I get your point with the specific "deep discharge batteries" but thats kinda marketing snake oil, they're actually very similar to UPS or moto batteries
Great video, I've been wanting to do this for a while to ensure my internet and router don't go down during a power outage. My recommendations: Use marine/deep cycle batteries, battery boxes, and maybe storage container to consolidate (portable?) the system. For the preppers out there, it would be interesting to see how to recharge this system using solar panels only. Cheers.
Very nice advice, but "...in Romania, we slap to Astra's together and go to the moon!".
True 🤣🤣
@annestywest7488
I bought a Cyberpower cp1500pfclcda 1500va 1000w sine wave battery back-up system it has 2 9AH batteries 24v so I added 2 100AH sealed lead acid batteries 24v but it can't see that I added more AH to it and at 207w it only runs 44 minutes then shuts off but the batteries are still at 24.5v when it cuts off. Can I hack the system to change the settings? Maybe I should just buy a power inverter to run my things?
@annestywest7488 sadly some ups models do not actually check the voltage of the battery to deteemine runtime, they just have timers based on the load. I had an Eaton like that. I don't think you can change the ups settings.
Question, did the UPS built in battery level indicator eventually begin to accurately represent the new battery levels? How long did it take?
EDIT:Typo
It's almost accurate, but the batteries never get drained fully. This setup is used more as a backup in case s#it hits the fan.
@@UltimateDIY Yeah, I am thinking about buying a refurbished UPS and adding an external battery bank to it to run the modem, router, security cams, NVR and charge laptops and cellphones. Should be a constant draw of about 40 watts(without laptops and phones), which should give me about 1 day per KW, maybe 20 hrs with system losses.
Just try to use deep cycle batteries. If you use standard car batteries make sure you don't discharge them deeply or frequently.
@@UltimateDIY I will likely use deep cycles made for solar systems.
Perfect 👍🏼
Many people concern and diaagreed ...why need to modify the UpS instead of buying ready made sold online and in many hardware store....so my answer is...this project is thinking out of the box...many inverter sold came with no spark fuse..event they built in fuse..that does not protect the unit board..once its sparked..the whole unit became unuseable...throw away...i came here after my inverter unit was damaged/blown...this make me think how this UPS work...there is many UPS was thrown away after the built in battery died..not many people known thay the battery is replaceable...thank you admin..you inspired many people in the world..keep a good work..keep post it..
Thank you!
you should realy use marine battery or solar battery becouse car battery is designed to deliver high amperage in small bursts but marine and solar battery are designed for draining compleatly
Agree, but they are way way more expensive for the same capacity, sadly.
Yes, but modern UPS have a low voltage cutoff, so car batteries won't get damaged directly. However deep cycle batteries can do much more cycles before a drop in capacity than regular car batteries. In the end, car batteries lasts much longer during an outage than small UPS batteries.
@@ShawnGuertin Was just about to say the same thing lol.
Draining completly without harm to battery
@@ShawnGuertin How many batteries for a week of power
Bill is right, you need to keep the same battery technology unless you want to go and reprogram the new float voltage and also I have done this before, but ended up charging the battery array externally as the internal battery charging circuit is designed for small capacity battery banks (No more than 36Ah and considering the SUA1500 has 2 x 17-22Ah gel cell batteries in them anyway) I ended up having an external MPPT 24 volt solar setup that charges the batteries and I just switch it on when I need mains power and off when I do not. Additionally if your pushing the UPS output past 930 Watts for long durations (this is based on the 1500 VA variant, the transformer can overheat quickly and kill your UPS. Stay under 500 Watts as a constant load and it will run for past 10 hours without any issues if your battery bank is big enough.
With an external Charge controller, you can let the battery float to whatever the battery technology you purchase is. Remember that long durations of just charging will make the batteries lazy when you do throw a heavy load at them, so remember to calibrate the UPS to the batteries ...oh and disconnect that blasted buzzer!
If you want to get more grunt out of your UPS, adding extra FET's to anything other than the base model (4 FET's only) gives hardly any improvement except a slightly better surge capability. I ran 2 x 100Ah batteries on a 50 Watt dual solar cell MPPT for my remote shed. I got over 6 hours of 360 time before the UPS started hinting it was running low, so I just switched it all off and 2 days of sunshine later....another 6 hours again
If you do want a bigger max load output, alas the 1500 is 24 volt, but it then goes up to 48 volts for the 2200 all the way up to 5KVA. The 5 KVA and up models go to 96 and then 120 volts... The longer your cable run, the bigger the cable will need to be and especially if your going to mode a 1500, change those DC cables for 2 Gauge as running a 750 watt load for more than 20 minutes will leave you with the insulation starting to melt! 4 guage at a push ... DO NOT FORGET THE BATTERY ISOLATOR, FUSE THE HELL OUT OF IT AND DO NOT LEAVE IT UNATTENDED WHEN YOU FIRST FINISH IT UP!
Thank you for the detailed information!
@@UltimateDIY the lead-acid AGMs in stock UPS, marine batteries, and car batteries are all lead-acid, all work the same way, all have the same charging voltage thresholds. The difference is that the UPS charger cannot supply as much current as a big charger can. If the UPS charger is stupid and is relying too much on the internal resistance of the 7AH pack for current limiting, it will overhead because it's trying to deliver too much current for a long time.
Minimal quality UPS are smarter than that and current limits to protect itself even if the battery is shorted.
The only real advantage to having an external charger for your bank is that the external charger will charge at a much higher rate than the builtin UPS charging circuit can.
IIRC, the optimum charge rate for a lead-acid battery is about .1C, where C is the capacity in AH. So a 7AH battery *optimally* charges at .7A, and will take about 10 hours to charge 100%. You can take it as a given that UPSs target somewhat less than 10 hours. Say 5 - .2C. Meanwhile, a 250AH truck battery wants to charge at 25A for 10 hours. No consumer UPS is going to charge remotely close to that level, and even at the 7AH's double-optimum rate, it'd take over over 5 days to charge.
Reprogramming float voltage et. al. would only be needed if you changed to a different battery chemistry. Like LifFePO or NiCd. But you're not.
You could potentially rig up an automotive charger into a UPS to charge the backup battery automatically, but that' would require rather more surgery on the UPS.
@@fromagefrizzbizz9377 There is a small chemistry difference between car lead-acid batteries and the deep cycle lead-acid batteries.
I think car batteries lead plates contain some barium alloyed with the lead. It is possible that some have calcium alloyed with the lead.
As you use the battery, the lead sponge on the anode (negative terminal) turns to PbSO4.
At the cathode (positive terminal), the PbO2 (spongey PbO2) turns to PbSO4.
The purpose of the barium or calcium is to prevent the formation of large PbSO4 crystals.
In any case, once you use the battery too much, too much PbSO4 covers the plates and it is hard to recharge it.
The purpose of car batteries is to give high amperage (100 A to 500 A) for a short period of time to just turn the engine, which is why it uses the high surface area spongey lead and PbO2.
In the case of deep cycle batteries, the plates aren’t so spongey and can’t give high amperage. The plates aren’t the high surface area type.
You can adjust float voltage using SM protocol in hyperterminal. Plus charging can be boosted upto 14 Amps in 1500VA model by solding a resistor on board. Transformer will heat up but you can install better fan to cool it down.
You can easily run 2 100Ah batteries by doing that without any additional charger or anything.
Thank you for the info! ✌🏼
I like the video and the concept of using larger batteries for your ups backup units. You must realize that ups inverters are not very efficient and the chargers are not a high rate charger. A 1500 VA ups can only run 500- 700 watts for long periods. The low volt amperage is 25-35 amps @ 24vdc for 120vac output. this translates to 2-3 hours of run time max. The 2 amp charger will take 2 days to replace this charge in the batteries. Also realize that the inverter will not switch on if the power has already gone out and the ups was not plugged in at the time to mains. A ups uses the mains to sync ac hz on mains and then switches inverter to match. If you take a fully charged ups out of the closet and turn it on to provide backup power nothing will happen as it has no mains to sync to.
I though the same, but it seems at least this model is able to power on, even if it was disconected before the power is gone. If I remember right, I added this info as a text somewhere almost at the end of the video. It is not happy to power on like that, but it does :)
Not sure about other models, though.
Nice video to watch and learn. But I am just thinking. Aren't UPS built for emergency saving your work and eventually you need to use the generator? And isn't it better to use instead an inverter if you really need power from a bettery? Just my thoughts.
Yes, but then you would also need a separate charger. The UPS in the video was really cheap and that settled the issue 😄
Che fach, muh. I recognize that accent. My grandparents were from Alba Julia and came to the USA in 1932. They spoke Romanian at home but they forbid each other from speaking anything but English outside the home. I learned a few words and phrases but that was 60+ years ago. Great job on the UPS!
Bine!
Alba Iulia is at about 50km from my home town. Glad you are not forgetting your Romanian heritage. Thank you for watching my video!
@@UltimateDIY Tocana con mamaliga!
Buna, buna!
Hello sir, I have contacted UPS with 35ah Amron car battery. I have checked that 35ah full battery provided approximately 4hrs backup for 200 watts load. But I am using my laptop with wifi during backup time UPS automatically turned off after 5 minutes of backup instead of long time. If turned on again then also turned off after 5 minutes. It's quite difficult to use please give me a solution. Thanks in advance.
Hello. Sorry, but it's not about a universal sollution. Each brand and model of ups bahaves in a different way. Some can even be set up by connecting to a pc with a dedicated software. If it always shuts off after 5 minutes it seems to be on some kind of timer.
Hello! Did you have any problems with the current while charging the batteries?? regards from Austria
Hello. No problems. It seems this particular UPS model handles this modification really well.
@@UltimateDIY Thanks!
Welcome!
Excellent setup and clear instructions, I like to stress to viewers that you need to pay attention to the transformers and validate they can handle the load.
Thank you!
I use a old 1500 volt amp...(1500 watt) ...APC brand UPS that was thrown away to power up my modem, WiFi, TV, clock and the modem cooling fan when the power goes out. The total load is 363 watts so there is plenty of reserve in the UPS as this is only 1/4 rated load. I added a 55 amp hour power wheelchair SLA sealed lead acid battery to extend the run time. This system has been on line for 3 years with no attention needed. I added an LED volt meter that is constantly on so I can see the battery health in a glance. Its better to have a larger UPS running at a lower load than rated.
Exactly. The number of batteries in parallel can be any, but it is important to warn the audience that the UPS has the power indicated on the label, which it can supply, such as 350W. In practice, about half to 75 percent of the power consumption is used, ie about 175-230W. This means that you can power devices that have a maximum power consumption of up to 230W. If someone powered devices that have a higher consumption, a Bosch battery up to 100Ah would certainly be able to do it, but the UPS transformer will not be able to do it and it will burn with all the electronics. This is called overload and the UPS transformer really can't handle long-term overload. The author of the video has to be very careful about that, and so do the viewers.
I did this a LONG time ago using deep cycle batteries from my wife's power chair. I had a relatively small APC backup and two deep cycles in parallel. It gave me (according to the reporting software) something like 1 to 2 hours. First test seemed to be accurate.
Rarely used it, but I did note the tiny backup took a LONG time charging them up again.
Our power here is usually very reliable, the batteries leaked a bit after a number years of disuse.
Tonight I was in the middle of something semi important and power went off. Hmph!
I had just read a How-to-Geek article on having battery backup for your router. Yea!
Was VERY surprised that even $300+ backups were reporting less than 30 minutes of half load time.
I agree, of the shelf backups are still a joke in terms of up times.
You used inverter much better give you much better battery time ok those things batter eater no joke i have one i have have 5 inverter 500 watts,800watts,1100watts,1500watts and 3000watts inverter much better
so how long those battery lost may i asked i have 350va ups 12v deep cycle battery 75A i run for like 9hours and more
giving power is OK - but I have a question regarding charging the car battery: charging is done in known conditions suitable to the original battery. You might have a problem with charging current to the car battery, am I correct??
It's not ideal but still works.
The reason why the cable didn't fit through the groove is mainly because of the insulation to copper ratio. Mains cables are double insulated (at least European is or should be) which adds to the diameter even if there isn't a lot of copper. The cables designed for connecting to batteries don't have as much insulation and have a ton more copper for higher current.
Ok, that makes sense. Thank you for the explanation 👍🏻
Hey, dont know if you read comments, but just wanted to ask, does your UPS still work all these years later? How long did the batteries last? Cheers
Hey. It still works, but it was left unplugged for a long time at a point and one of the batteries overdischarged to a point that the ups refused to charge. So it needed to be charged with a car battery charger. Now it's working again, but I suspect the capacity of both batteries has dropped over time.
the problem of extending an ups with batteries of greater capacity, is the UPS is not designed to work for such a long time, and less if you connect a computer that costs at least 300w, the transformer that it has at some point will burn, if the ups have no over consumption protection
True 👍🏼
I got a chance to play with some lower grade ups units and they are built way cheaper than the APC units I worked with.
I have a 330 watt APC BE600M1 with a 140 watt load. I hooked to a deep cycle lead acid marine battery to the UPS battery wires with the UPS battery still installed in the UPS. It wouldn't work at all powered by the marine battery unless the UPS battery was still hooked up. . The marine battery is supplying 12.5 volts to the UPS but it pretends like it isn't even there and shuts down in 15 minutes same as it does without the marine battery hooked to the wires. I don't understand why?
I Googled bosch S3 012 specifications. It said "wet" I assume that means it's a lead acid battery. Is that correct? So your UPS works good with a lead acid battery. Mine should also I guess?
Some units don't check the battery charge level, but only set a predefined timer. It seems yours does that. Probably there ia no way to make it last longer.
Hello bro. I have an apc 1500 i connected 2 cat 210ah batteries in series because it works with batteries in series. I previously charged the batteries externally but when i conmect them to the apc it always says low charge... dunno why. And connected a 1500w computer and apc shut down.
Hello. The part with the charging is a bit weird, but where did you get a 1500w computer from? An apc 1500 will output maximum 1000w, so anything above that will force shut it down.
I want to use an amplifier 2sc5200(4 MOSFETs) in car.does a ups work properly. And I also have done that idea but couldn't find success because ups goes to automatically off. Please reply... thanks.
Sorry, but without actually seeing the issue myself it's impossible to troubleshoot.
Hello. I have a question. Your external Battery Cables are approximately AWG 6. But after the connector, your original UPS cables are more like AWG 10 or 12 only. Isn't that dangerous? I am ready to copy your concept with 2 pieces 50Ah batteries but also my original UPS battery cables are only AWG 10 or 12. Is it safe?
Hello. The ups itself can't draw more current than those cables can carry.
Very nice DIY video. I am considering to do this on my UPS, probably when my present battery gets too bad.
Thanks!
Just try to get deep cycle batteries. They will last more.
Thank you. But how can i adjust the float voltage and what to use by doing that?
I don't know, as such details are completely linked to the particular ups you are using.
The 24V fan is annoying as hell in these ups, the problem is maybe the ball bearing, is a monster fan, you can try to change to a more silent, i recomend you adding a 12v external fan, big like PC fans silent and constant to mantain all cool when it charging.
Thanks for the idea.
so, is your apc can full charge those battery? is the charging system (apc) wont overload since your new batt is already at high capacity.
Yes, until now it has handled them well.
I have a query about 1200va ups (APC), how much amp hr battary can be install / support. Existing battaey into: 12 volt 9ah. I mean, can i use more AMP HR battary, for UPS works fine / without any harm to internals of UPS, to increase backup hours ?
It is impossible for me to know for a model that I have not used. Usually if it has active cooling (temperature controlled fan) it should be ok. As fot the battery capacity, the bigger you use, the longer it will take to fully charge. Depends on your needs.
How long did the car baterry lasted? I see the video is 6yrs old!
They were recently replaced, bacause the UPS was left disconnected from mains for a few months, but still connected to the batteries. This completely discharged and damaged one of them.
About can I deliver sufficient power for one pc without peripherals and one pc with a monitor (i7 9700k 3070 Nvidia with 700w power supply) I'm looking for something like this because in my country in summer we suffer alot with power loss
Yes, it can without a problem.
Can anyone tell me the model number of the APC unit in this video? And if it is a 24 VDC battery setup?
It's an old APC Smart UPS 1500VA, running from 24V (2x12V), if I remember correctly.
How's the ups charger holding ups considering the bigger batteries, is it safe does it not overheat?
This model is safe as it has good active temperature management.
Ash I see I have a 360w meccer ups, connected to a 100ah battery, but I put a separate charger, do you think the ups onboard charger will be sufficient?
@@ahmedvawda9646 not possible for me to guess, as I don't even know that brand.
Im using car battery and ups BR650CI-AS but the outpot power of ups is 180v ac only running with the battery insted of 220v ac her in the philippines if i using power line the ups output is 220 vac with battery. Do you think what is the problem?
It might be defective, but couldn't really say what is wrong.
Does the ups ever fail after some point?Some commenters claimed the charger part of the ups will be working too hard to charge such a big battery
Most UPS units charge at a fixed current, as long as it remains in spec then it should be ok
You should have used ring terminals for larger gauge wire, the blue insulated are for 14-16 gauge wire,I believe the ones with yellow insulated for 10-12 gauge would have been the correct size.
When connecting to the battery terminals you could have just used ring terminals connected to one of the screws which tighten the cable connection, this would have been more secure than your bundle of wire.
Also, if you change the battery orientation so that you have a positive and negative post at each end the UPS connection will be at one end, the fuse at the other end.
Thanks for the info :)
Hi man how long did you run on those batteries and what was the consumption in watts. Thanks
"No burning Smell" LoL, great video man, really enjoyed.
Thank you! :)
I've found APC Smart-Ups 3000VA for really cheap, the problem is that it uses 48V (12x4 in series) battery, i got a car battery of capacity >336Wh (336Wh is 12*7*4 of stock), could i use boost/step-down converter to use that battery in that ups?
I don't think you can do it, without extensive modifications to the ups. You should disable it's charging circuitry and only use it as an inverter. But enen then, it would probably never know the real charge state of your battery and you might over discharge it.
Well thats unfortunate, thanks for info anyway
Sir i have a follow up question... ive done it already but my question is does the ups will overcharge the car battery to extent it will blow?
Unless the battery or ups are defective, no, that will not happen.
@@UltimateDIY thanks
Did you reprogram the charge curve on the ups for the differenct batteries??????
Very nice explanations, Sir.
✌🏼
De ce ai pus in serie?
Nu ar trebui oare sa fie in paralel, sa crească doar amperajul?
Din cate stiu in serie creste voltajul iar in paralel cresc amperii.
Acest ups functioneaza la 24v, deci trebuie in serie.
@@UltimateDIY mersi
Pt putin 👍🏻
How many days did it took to fully charged the batteries?
Don't really know, because I never need to let them get that low.
How you have solved the self test problem? APC UPS first check if the batteries are the same of originals.
I've received an error after the self test.
Never got this error.
The UPS was designed to run (X) min at full load. now you are capable of running it 4(X)min at full load. UPS will probably overheat or electronics/transformer fail, what have you done about that?
No, it will not overheat. This is not a low price ups with passive cooling, this has a temperature controlled fan and the fact that the batteries are no longer in helps even more, with better airflow and no heat generated by them.
@@UltimateDIY Partially true. The UPS may have temperature control, which means it can protect itself from damaged but that doesn't mean it wont overheat. you may have slowed down the temperature rise by having an empty caucus, but it can still happen. the fact is that the inverter components where not designed/chosen for that extended run time at full load. things like transformer insulation, sink pastes etc. I've done the same with my UPS and this has always bugged me.
I do not think any of the components are unable to handle the extended load time. I would agree with you if we were talking about a unit designed to run for 10 minutes at full load and I would extend that at 2 hours for example. But in my opinion this unit even with standard batteries already has enough time to reach maximum operating temperatures on all components, so they are designed to withstand that.
@@UltimateDIY It not about reaching operating temperature, it about extended exposure to that temperature. the design safety factor may have been limited by the maximum possible operating time of (X)min based on batteries of (Y)Ah. you are now using 4(Y)Ah batteries and thus capable of exposing those components to that temperature for 4(X)min longer. there is a possibility of premature deterioration of the components. Even if you look at transformer or generator specifications, they will tell you for e.g "that this unit can run at say 80% continuous and 100% for (x) amount of time". Anyway, all im saying is that this is something you should think about and not dismiss because there is active cooling. since it was a SEALED unit with a defined and finite possible maximum operating time (Due to battery size), the designer could have chosen his components and he cools them within those known limits. it would be a different story if this was a stand alone UPS with external battery connection, and i bet you then that the designer would have mentioned either a max Ah battery to be used or provided a time vs load chart.
I understand what you say, but I do not consider this to be such a big risc. If you use the unit at max a lot of time, that is another thing. In the use scenario this particular unit was modified for, it will not see a full load, but something like 25% to 50% maximum, so this makes me confident it will survive.
How high of VA of UPS should I buy if I have a car battery with 11 plates?
I do not know.
Guys, I have APC SU1000XL, which goes with additional battery pack extender input from behind. Does internal and external batteries are charged separately? E. g. can I use half dead batteries as external extra battery pack along with new batteries inside, without risk of reducing lifespan of internal batteries?
I don't know. Maybe others can help.
I have replaced the 7ah battery to a 40ah car battery in my 600va UPS. The battery is fully charged. But I am not getting any extended backup time. The UPS turned off within a minute. What may be the possible cause? Appreciate if you provide the solution for it. Thanks in advance.
Impossible to say without measuring the voltages. Is the car battery new? Maibe it's in a bad shape and unable to sustain a high enough voltage.
Ultimate DIY yes the battery is new. I even charged it for around 40hrs. What I have noticed is when the UPS turns off. I again make it on and it once again runs for a minute and goes off. This means the battery is not drained. Anything else I can do?
That is weird? For how long did it run with the original battery? It might be shutting off due to overheating.
Ultimate DIY Even I am suspecting that. My old battery runs for about 1-1.5 min, and the battery drains off completely. But here with the car battery It turns off faster and the battery remains charged.
Also one more thing my computer load is 450-500 watt. And 600 VA supports only upto 350 watt, I read it in its label.
Does the car battery work with higher VA rated UPS? Without getting switch off. Or can I connect this battery with high rated inverter to keep my computer on?
You are overloading the ups. I'm actually surprised it does not instantly turn off. On a 600va ups you can (in real life) put only about 250w of load, especially with a long run time given by a high ah car battery.
I did that but the transformer after sometime got very hot and disconnect the loads so what can I do?
Your unit is probably too weak for something like this and does not have active cooling. Not much that you can do to use it safely.
Great setup, you have skills. I have the same idea to do something like that. I wanna disconnect the 230v main and charge from solar. That way i can use it as a backup power-supply for fridge, computer, fans etc. I do not wan't mains connected all the time. 30 Watt solar panel can charge my mini UPS with 12v 7A battery (Real 3.5Ah) in less than 3 hours. I also have a 230v - 12v battery charger + trainer at 12v - 1A and does it also within 3 Hours. Because Lead-Acid batteries have a discharge cut-off at 50% capacity they charge quickly from 50% to 100%. Basically your 88Ah - 24v (2x12v) Car battery backup unit has only 44Ah - 24v capacity = 1KWh of real capacity to use with the UPS inverter. If your UPS charges at 10A it will do so in 4 hours to 100%. These old inverters from the 1990's have a very low efficiency, probably 75% or less at high 230v loads. So you lose another 250Wh of capacity to conversion & heat and end up with only 750Wh. Not to bad for a shabby 24v car battery that cost probably $120 or less. You do have to be aware of gasses. Regular maintenance of the battery is required like with your car. My Mini UPS has a few (4) switches on the back to set cut-off voltage and acoustic alarms at different loads (voltage drops), e.a. 160v, 172, 184v and 196v at either 50Hz or 60Hz meaning you can (un)safely drain the 12v Lead Acid down to almost 20% making it compatible with expensive deep cycle gell types, if i am right? Maybe it is just a security threshold voltage when the backup battery kicks in to protect delicate electronics like your PC from surges or dips without power loss?
Thank you for this info!
What is the blue thing you installed in the wire?
Probably you mean the fuse.
Why does my UPS keep on beeping while being connected to the car battery?
Please explain your full setup and what exactly you did.
great idea...I did it years ago but you should be using 10mm or ideally 16mm cable
Thanks for suggestion 👍🏻
Salutare! Mi-ai rezolvat problema UPS-ului de la centrala. Am urmarit toti pasii. Am sarit totusi peste unul (n-am avut canal-canalet de cablu si am folosit o bucata de teava gri de scurgere ca sa bag conexiunea cu siguranta dintre baterii). Totusi indraznesc sa intreb cum se comporta bateriile auto, dupa doi ani de folosinta? Multumesc anticipat!
Salutare. Ma bucur ca a ajutat video meu!
Bateriile inca functioneaza perfect. Dar nu am avut prea multe caderi de tensiune in ultimul timp.
Thanks for the info! Big like for this tutorial. Good job and good luck!
@@victorionutionita thank you!
nice trick with the super glue, i came to the same conclusion to to finish tape with super glue after some of mine start coming unraveled.
Hello, is this possible for a 650VA ups?
Yes.
Salut, cred ca vorbesti romana. Am facut ceva similar pe un UPS de la Njoy de 600VA. Am legat-o la o baterie auto numai ca pe plus i-am pus o siguranta de 20A pe care mi-a ars-o la prima incarcare. Cred ca nu am luat in calcul ceva. Am crezut ca e aparatul stricat si l-am lasat deoparte. Acum cand vad filmul tind sa cred ca nu am luat in calcul ceva de mi s-a ars siguranta aia. Pot sa las firul fara siguranta sau sa ii pun o siguranta mai mare?
Salut. Din pacate, fara sa vad ce e acolo nu pot sa ghicesc. Fara o incarcare serioasa pe ups, nu ar trebui sa se arda aiguranta de 20A. Daca pui una mai mare si e ceva in scurt, rist sa strici altele.
@@UltimateDIY Am un ups cu o singura baterie. Am bagat in el cam 350-400W. Nu a fost nici o problema. Am scos din priza UPS sa vad daca duce singur cu bateria si cat timp. In 15 minute bateria a murit. (bateria nu e noua, e posibil sa fie stricata, am luat-o de la un amic care voia sa o arunce dupa ce a stat vreo 2 ani in beci). Dupa ce s-a golit bateria am bagat stekerul in priza sa incarce bateria si dupa 5 minute am vazut ca nu mai incarca. Nu eram langa el cand s-a ars siguranta. Nu mirosea nimic dubios in camera.
@@UltimateDIY Am vazut ca pe firul de plus dintre baterie si UPS tau nu ai pus nici o siguranta. Ma gandesc sa refac legaturile fara siguranta.
Indiferent unde pui siguranta pe circuitul bateriei, ea trebuie sa existe. Eu parca am pus-o intre baterii.
Nu as lega fara siguranta, pentru ca risti sa dai foc la ceva. In timpul incarcarii sa puste siguranta de 20A nu e normal. Nici nu poate baga ups-ul atat in baterie. Ceva sigur s-a pus in scurt. Vezi ca bateria e posibil sa fie praf.
Why not mount the Anderson plug on the outside of the case? Then you can disconnect the batteries if required without having to worry about insulating the terminals.
We wanted the whole build to look as clean as possible, so we get a high WAF (wife approval factor) :)
Absolutlly. And be able to charge the batteries faster if they run low on charge due to a outtage.
Hey what is that enclosure called? Please share the link
The enclosure? Not sure what you mean.
Great video thank you. I have a 750Va/375w ups; which battery do you recommend and its max capacity in Ah?
Thank you for watching. I don't have enough experience to recommend anything.
Just keep in mind that the more Ah, the slower it will charge to maximum. Also, the more Ah, the better the cooling on your ups must be, to be able to handle longer battery run time.
Salut, imi modifici si mie un ups asa ? Din ce oras esti daca se poate si cum dau de tine. Mersi
Salut. Nu ma ocup de asa ceva.
Great instructional video...The question is, if you use batteries like the marine or telecom batteries, how would you know if the UPS charging circuit will be able to properly trickle charge these batteries?
Hello. I do not know, as I never used such batteries.
@@UltimateDIY Ok thanks.
I googled APC UPS 3000va schematic and i got a 6page pdf document with schematics...so i will review and look for clues there.
What about Charge time and load, can the ups Charge the bigger battery?
Charge time will be proportionally longer. This particular ups can handle the increased capacity without overheating, because it has active cooling.
@@UltimateDIY ho do I know if my ups can handle the extra Load on the larger batteries
Only by careful testing with voltage and temperarure monitoring.
But, as an idea, a good brand UPS with active cooling should be able to handle it.
@@UltimateDIY sorry next question if you don't mind. Can a battery charger be added to a battery bank and stay connected even if there is load on the battery or does it have to be switched off ?
That I don't know. Probably it depends a lot on the particular charger.
....and here i have a cheap, ass mixer....lol great video thanks :)
Thank you for watching!
Hi, your mod is 2 years old now, i wonder how is your car battery. is it still in good condition? or are you already replace it?
Hi. It's still in good condition, but it's discharged only about once a month and only about 50%. There were way less power outages lately.
Nice vid. I'm thinking on using two 50Amp's AGM battery on my SmartUps750I . Do i need fans for cooling the UPS inside.
Thanks!
The cooling capabilities depend a lot on the particular ups model. I am not familiar with yours, but if it does not have a fan, I would add one, just to be safe.
Mi se pare absolut genial cum ai un vocabular impecabil in limba engleza (mult superior unor vorbitori nativi) si accent balcanic puternic. You could be the best russian spy in america, ever.
Multumesc mult pentru cuvintele frumoase! :)
Great project, great execution! Thanks for sharing 😀
Thank you!
Nice video, will this car battery work for my setup below. With a load of 300 watts.
1. 1500 watts 24V Inverter.
2. 80ah x 2 car battery.
3. Can I use this setup every day with 3 hours run time during power cut off.
4. Will this battery last up to 1 year of usage.
Will appreciate it a lot if my questions (4) are answered as cost is an issue.
Thank you. With daily use you need special deep cycle batteries (really expensive). Car batteries don't like to be discharged so much daily.
@@UltimateDIY In fact lead acid batteries can work on much longer ups systems. Because modern UPS systems do not go below 12.5 volts to keep battery life long. thus, they do not go below 20%, which is critical for a battery. In this context, it is more accurate to use lead acid batteries in modern ups. Because gel batteries have a price tag almost 4 times higher. With the same budget 4 times more amperage lead acid battery can be bought.
99% of the other comments say that you should not use standard car batteries. As my friend is already using them, I hope you are right :)
@@UltimateDIY New generation UPS systems do not reduce the battery to less than 12.5 volts. This makes a standard battery run like a deep-cycle battery. Even if you buy a gel battery, the new generation UPS systems will not use this battery to the bottom, it will stop the operation at 12.5 volts. So where's the advantage of buying a gel battery? And 4 times more expensive.
I want to take my claims a step further, the old type wet batteries, bumper cover is better. periodically interferes with water and acid levels. This extends the battery life more than expected.
Ups has an eprom similar to those, found in laptop batteries. To upload its contents to the pc, you may need to do the same as with laptops. 10 discharges in Windows, 1 discharge in Bios (must be about 45 min). In bios, each discharge will enable one option, that may be off by default, when you buy the device. That will enable lower fan speed, less heat, higher performance, and less cpu usage. To achieve this, you may need 10x 11 discharges, depending on your computer’s health.
hii. This can be a silly question.
I have a ups that uses six 12 v 9 aH batteries, can I change them for 12v 12 aH batteries without a problem?
Hi. Depends on the model, but 99% yes.
Salut,
Am un UPS Cyber Power UT2200E 1300W si vreau sa-i pun 2 baterii exterioare. El lucreaza cu 2 la 12v7Ah, deci 24V 7Ah. Vreau sa-i pun 2 Ultracell pe Gel la 100Ah, o sa am 24V la 100Ah. M-am informat si am primit raspunsuri gen ca strica bateriile sau ca arde placa electronica a ups-ului pentru ca el incarca la curent mic pt baterii de 7Ah si daca adaugi baterii mari va fi solicitata placa si va ceda. Am urmarit diferite clipuri in care am vazut ca e posibila incarcarea bateriilor mari de catre ups, am vazut ca ai reusit si tu, nu am gasit modelul meu de UPS exact asa ca nu stiu daca o sa mearga si la mine. Daca ma gandesc logic, si as lua exemplu un redresor de baterii auto care scoate 7Ah si poate incarca o baterie de masina de 150Ah si nu s-a stricat, as zice ca e posibil sa functioneze. Astfel, te-as intreba si pe tine sa imi spui daca crezi ca ar functiona pe modelul meu de UPS.
Acesta este UPS-ul meu www.cyberpower.com/eu/en/product/sku/ut2200e
Multumesc.
Salut. Nici eu nu inteleg logica celor care zic ca se strica. Singura explicatie ar fi ca vorbesc despre unitati de o calitate scazuta cu electronica la limita.
Eu consider ca o sa iti mearga.
@@UltimateDIY Merci pt raspunsul rapid. Tocmai am vizionat un clip cu un CyberPower montat pe o baterie de 300Ah facut prin 2015. Inca ar functiona dupa 2 ani. Am sa cumpar bateriile si ma apuc de treaba. Merci din nou.
Cu placere!
What is the spacific UPS you are using? it looks like APC SMART-UPS SUA1500I. I can buy that one used without batteries for 40 euros. Is it worth it? Can I use it with a car battery like you. I just need one car battery. I want it for my 3D printers and PC.
Sadly, I don't remember the exact model. It might be specified in the video at some point. The price is good at 40e. You can use it with car batteries, but you need two in series. It does not work with only one.
Ultimate DIY ouch that sucks. Why is that. Does it need 24 V? Anyway thanks for answer :)
Nebojša Kamenčić exactly, it needs 24v.
I do that on an APC Pro 1500 (24V), but I used to do that on a TrippLite Smart 100 LCS which was 12V and only required one car battery, the problem was that it could only output 500W and it couldn't run my fridge, so I guess that wouldn't be a problem for your printer and PC.
Great.would u mind let me know that,can I use biggest battery with homepage inverter
in this way does the ups charging the car battery ?
Yes.
Good video and great explanation ,thank you👌
Welcome!
The reason for it not turning on if it previously did not get AC voltage at its input is, for one, that the AC the UPS creates must be in phase with the line AC. Primarily the required clock signal comes from an active line AC voltage. Secondly, safety.
But there is a way to force it on, if you really need to. I show it at the end of the video.
You may force coldstart as you figured out
Is the battery connected in 12v or 24v
Two 12V batteries in series resulting in a total of 24V.
what model UPS is this?
sir i use this method with APC 1500 with 65ah kung long batteries but ups gives me just half hours y? my batteries are new and they both have perfect health. i only use computer complete desktop set up. cup have 550 watt psu, 19 inches led, mouse, keyboard and headphone just
There are a few variants:
- your PC uses more power than you think;
- you are making your calculations with the full capacity of the battery, but the UPS will never drain it to 0%;
- I do not know the brand of the battery, but it might simply not have the rated capacity;
If my aproximations are right you should be getting 2.5 hours of use, but this is a really ruff estimation as I do not know what gpu you have and how you use your PC.
Do you ever smell the gases from the batteries? The charging of lead-acid batteries can be hazardous. However, many workers may not see it that way since it is such a common activity in many workplaces. The two primary risks are from hydrogen gas formed when the battery is being charged and the sulfuric acid in the battery fluid
Never smelled anything. I think modern batteries that are in a good condition release really small amount of gases. My car for example has the battery in the trunk, which is directly connected to the inside of the car. They would not have done that if the risks were too high.
Agree - wet cells should not be used indoors without a vented, explosion proof container. I have a nice RV charger to use for ham UPS nut mt wait to but the $$$ AGM battery.
Sorry, but the reality is that the hidrogen generated is way way less than people think. Yes, it's not ideal, but it's not a bomb either.
I have art tronic
It works
No problem on 12v
Doesn't need mains to stop
Its very good
I've been using a car battery with a 600 APC for a while, but the UPS evidently runs on a timer because I only get about 15 min run time before it shuts off, and the battery is still over 12.1 Volts...
I've heard that smaller ups units will not really work right with car batteries.
Does doing this damaged the ups in the long run?
No. It's still working as intended.
@@UltimateDIY sir im planning to do this build. My car battery is a used but still in good condition and still has power. What will i do after im done? I will let the ups charge the battery 1st or i can plug already my pc unto to the ups after?
You can let it charge.
@@UltimateDIY whats the model of your ups sir? I watched till the end eventually need to charge 1st.
Don't remember the exact model, but I think I show it in the video.
how many battery's can A person have connected at same time ? I plan on using car charger to charger battery's wen disconnected from UPS.
I don't think there is a limit for connecting them in paralel, as long as you charge them with something else.
I tried with UPS12-300MR C&D Dynasty Battery but It fails. Do you have any idea? Great video
Impossible to guess. It depends a lot on the ups model.
@@UltimateDIY Is the same model like you use here. Thanks
And you used 2 batteries, to get 24V, no?
@@UltimateDIY No, just one. Regards
This unit works at 24V. It can't run with a single 12V battery.
Great video. thanks for sharing!. I want to ask, i have a ups 550VA (330W) working with a 12V 9Ah AGM battery. Can i extend by adding parallel another one to increase the capacity?. The thinking is to add 2 x parallel 12V 7Ah so will be after 14Ah. Only to provide more backup time because the 12V 9Ah is more expensive than a 12V 7Ah and i can find easily good batteries in 7Ah or 7,2Ah. Thanks
Thank you for watching!
Yes, I think what you want to do will work.
Hello every one, this UPS, is it able to charge that big car battery without struggling,
And what is the value of the charging current if measured,
Is it limited or controlled...
Hello. It has worked for me for sure. Did not measure the charging current.
Battery ups , of any size , are only meant to run the system just long enough for Generators to come On line .
Battery ups were never meant to run the system for many hours or many days .
( without a Geenerator , what is one to do ? ) get a larger capacity battery .
or
to run the system just long enough to manually shut down the system and wait
for power to be restored ( typical home scenario )
True, but if power is restored before the batteries are drained, then you just got away with it :)
Is that apc ? And the topology is line interactive?. With that battery you should modified the online topology
Genes Gene yes, APC. How could a battery change the internal design of the UPS?
hi teacher one ask again
how many empire Fuse You are Used Between Tow External Battery
Hi. Sorry, but that I don't remember. But it's mentioned in the video.
How well will that nice connector stand up to acid and corrosion?
I have an APC Smart 1000, and I did upgrade with car battery but it shows time remaining of old battery's(shuts down after 22min and the battery bar is low but the battery's are fully charged), my load is 150-220W
Try to find the software disk and interface cable. If you talk to the UPS with their little program, you can tell it it has new batteries, and it will behave differently. You can even cycle them through a self-test diagnostic from there.
Its been 3 years, are you still using this?
Yes, my friend is still using it. But he did a stupid thing at one point. He left it disconected from mains with the ups powered off for a few months and one of the batteries got discharged so much that the ups could not charge it again. It needed to be charged on an old car battery charger. Now it's working again.
@@UltimateDIY I see, were the batteries charged 100% before the install? or just with the charge they had from the factory?
Just the charge from the factory.
Thank you for this info, can I use a blue gate ups 2200VA on 2x 75amps car battery?
Sorry, but I am not familiar with that brand.
But in theory, it should work.
Will it really work? Ups charging circuit usually not designed for that High charging current
The charging current is not determined by the capacity of the battery. It is the same charging current, but it takes longer to fully charge.
@@UltimateDIY how many house it's will take to full change, 0 to 100, please reply
I can't tell you that, because I never tried it.
You can calculated from the specifications of the particular UPS model.
@@UltimateDIY can you sent me the link of the specifications please, i will be very thankful to you, I'm thinking to buy the ups for our office, thanks
@@UltimateDIY i will be use 150A etch
The UPS needs a mains connection to charge the battery and to sense the presence of mains so that it can turn on when needed. You can always supplement the internal charger with solar panels simply by connecting a suitable supply directly to the batteries.
This particular model can actually power on even without mains connected.
least you take out the loud noise man, thanks for that!!!
Hi there
How do i determine the power factor
Loved you video
Hi. You want to determine the power factor of the unit while it is charging the batteries? Or the output while you have something plugged in?
I would just buy a plug in power meter. Most of them show the power factor.
I part own a wireless ISP did this on a few UPSs for our tower sites the 7 amp hour battery's just do not live long in those metal sealed boxes with the switches and power injectors to the power over Ethernet radios heat and cold kills them in less than a year I just made jumpers out of 10 gauge wire with terminals to match the UPC brand units removed the 7 amp hour batteries from them of course ran them thru the weather tight boxes with grommets to boat battery boxes from Wal Mart ive used every thing from a garden tractor battery up to a pair of deep cycle trolling motor ones to get 24 volts for the bigger back ups all have a lot longer life and power the UPSs for many hours when the power fails .
That is a really nice hack.
John Siders did you put in a fuse along the jumpers? He shows a fuse, but would think the ups would have an internal one
Does the ups ever fail after some point?Some commenters claimed the charger part of the ups will be working too hard to charge such a big battery
Mine never failed.
SeaLife TT have had one quit charging but we think it was a lightning strike that did it in also putting in a vent on the box side with a PC fan helps keep the ups cool the vents for boat bilges work well facing down with screen between the vent and sealed box all sealed with silicone to make them water tight and keeps the wasps out of the box . Yes I put a fuse inline too just in case .
Considering APC are one of the best UPS manufacturers I always have a facepalm moment when you look at the H bridge heat sink..... Why the heck to they place the electrolytic capacitors right next to the heat sink ??? Seems crazy to me !
Maybe planned obsolence.