Cheapest 48 volt LiFePO4 Battery, Pre-Built with BMS, Testing and Review, Gyll from Signature Solar
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- เผยแพร่เมื่อ 5 มี.ค. 2021
- This is the cheapest pre-built battery for 48 volt off grid powerwalls. At only $300/kwh nothing else comes close. This is a LiFePO4 battery, pre-built from the factory with a BMS, circuit breaker, all in a beautiful case. It's ready to go to work with your powerwall and off grid solar system. No need to add a BMS. It's rated for nominal 51.2v so it works with normal 48v equipment (inverters and MPPT charge controllers). This is the Gyll brand sold by Signature Solar. It's 100ah, 5,120wh. That's over 5.1kwh per battery!
Retail price as of this video is $1,500, which is less than $300/kwh.
Update: There is no longer a discount code available.
In the video I do a full capacity test. I test the BMS for over-current protection, and over-voltage protection. Finally I connect the battery to my computer to see what can be read.
Overall, I'm very impressed with the build quality of this battery. I think it's the cheapest at $300/kwh. I haven't seen any other 48v LiFePO4 batteries (pre-built with BMS) come close to this price point.
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“As an Amazon Associate I earn from qualifying purchases.”
Affiliate Links:
Growatt 5000W Inverter with 450V MPPT Charge Controller 5000ES: signaturesolar.com/growatt-48...
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EG4 Battery, 48V, 100Ah, 5.12kWh, LiFePO4, Server Rack design: signaturesolar.com/shop-all/b...
Waterproof EG4 battery: 48V LiFePO4 Lithium Battery with Bluetooth, EG4 Brand: signaturesolar.com/eg4-wp-lit...
Disclaimer:
My videos are in no way intended to be instructional "how-to" lessons. I am simply documenting my project for informational purposes. Property damage, personal injury, or death may result, even when following manufacturer's instructions. I cannot be held liable for such damage or injury. It is YOUR OBLIGATION to ensure that you are complying with any local and federal laws as well as code and permit requirements.
David Poz, LLC - แนวปฏิบัติและการใช้ชีวิต
Love the server rack usage. As an IT guy, I could mount my home power storage, server, switch and patch panels all in a single rack in my garage. Geeking out hard on this one. Nice bit of kit, thank you for taking the time to review and test this.
You can combine that with a rackmount 48 volt inverter and you've got it made.
as IT guy u should know that u have to keeep AWAY batttery banks from data banks. risk of fire pretty high on battery banks \ ups
@@riccardoz2953 No higher than any other UPS battery, and basically every rack I've ever seen has a UPS in the bottom.
@@riccardoz2953 Yeah, people lack basic common sense these days.
@@riccardoz2953 yeah so true. If i gonna have it i will have a new rack just for solar setup keep it away for my internal network and storage. 😁😁😁
Fantastic, exactly what I've been looking for... I think these will go into our next build! :)
Hopefully a glimpse at the future in regards to price vs capacity. A solid step in the right direction.
Tesla has talked about getting the price per kWh at the cell level down to the mid fifties (USD). I presume that's LFP, but don't know for sure. At any rate, that suggests there's a lot of room for home battery prices to fall.
This is truly a terrific presenter and a first class EDUCATOR. I love the integrity and style the most out of every single one of the competition. Safety, instruction with information on why you do things a certain way through a step by step technique. No nonsense approach into Facts along with a Pro's Opinion A+!
Thank you, that means a lot.
Wow, very cool! Thanks for reviewing these. Looking forward to seeing the whole rack. That would sure be nice to have.
I just stumbled across your channel. Too bad you were not around when I was doing solar when I was younger. I might get back into it though! Love the content!
Thanks for video David, these things always intresting to watch. Keep it up my man.
Great Scott had a good video on making a soft-start for inverters that automatically bypasses the resistor
@Mike Sims go back to the 7' mark
What an awesome battery. The construction quality looks very professional.
But they are not for sale 😂
They don’t have those batteries anymore.
Thank you David, I'm about a year away from putting in a off grid system, and or a backup powerwall. Finally something that doesn't say T--la, and performs right out of the box. Thank you.
T--la? What?
This video recommended by TH-cam and I'm very happy about that.
Superb experiment.
Thanks for this video! I now own one of this batteries, I'm using it on my remote off grid cabin.
I came back to the video because y want to connect the battery to my computer and I think you are the only one that shows how. Also I like that you showed your mistakes, now I know what to be careful with.
Nice find David. It is good to highlight these other options to drive competition and hopefully bring prices down for already assembled battery bank options.
David, this is an excellent review - you have my attention. This price is really good. I am looking forward to the next part. I think the key thin for many folks will be to use this as a home battery in a grid connected solar array, that lets you buffer your "own" power overnight - and if/when the grid goes down.
Yeah, I haven't been able to find a better price point for a pre-built 48v battery with BMS and with circuit breaker. I don't have time of use rates where I live, but I can see that being a big benefit for many viewers. Thanks for watching.
Congrats David!!!
You made SignatureSolar sell out of these!!!
Hope they cut you a nice check for all the great work you do!
I really dig the testing methods
The 58.2V peak during charging is perfect! Love the price too. Thanks for the review and I'll definitely reach out. -dc
For your test rig, perhaps put a label over the previous correction value and mark the date you calibrated it? If you test it later and its changed you'll have a record.
Man this is crazy, I remember when your channel was around 20k. Congrats on the growth of your chanel over the last 2 years. I finally got my solar shed up and running lol.
Thank you. And Thanks for being a long-time subscriber.
Awesome battery, Nice video as usual! 😊
Loving all your videos, David. This product looks fantastic! Do you have a favorite website that you recommend for the calculation of what sized components (batteries, solar cells, charge controllers, etc) someone needs based on their power requirements?
Generally, I like the resources at Alt-E. They are easy to understand. www.altestore.com/store/calculators/off_grid_calculator/
RS485 is a serial standard used in a lot of industrial equipment. There isn’t a preferred standard physical connector but screw terminals are very common. In this case the RJ45 socket is just a convenient commonly available connector.
As there are 2 connectors on the front of the unit I would expect you would be daisy chaining from one unit to the next (with screw terminals you would usually daisy chain from just a single pair of terminals).
David, you sold me on this with your review last night. Ordered. Thank you!
Your welcome. And thanks for watching and ordering. I hope you saved 5% with the discount code DAVIDPOZ
@@DavidPozEnergy I got the discount and bought 2 of them came in 5 days, hey Dave I got the 12 volt version and the pic on there web site shows a breaker and mine has none
Awesome as always, I may have just found my first batteries.
Wow- that's impressive! I LOVE the rack system, the compact 100Lbs. battery with breaker built in, and the communication capabilities. Looking at your 'power wall' from years of building batteries from whatevah was available- it's great but... Imagine having 6 in a rack, taking up virtually no space (well, in comparison David!), checking out cell status while eating a microwave dinner on top of the rack!!! (Are you feeling the convenience of this thing? I know I am!). Breaker, SoC, Pos. & Neg. are far apart for safety, sealed container, 103% of promised energy- what's NOT to love? It's too bad that the form factor doesn't work well for RV's, but- these folks may just consider that market as well!!! I really like this non DIY battery at $300/Kwh!!!
Hi David from your fellow New Englander. Great video. I own 3 of these bought them last year. So far so good. I also use a pc to monitor them. The dip switches are kind of backwards from the manual, but u can figure it out to assign each pack a unique id. Then it will show all the packs once u use that green cable to patch each serial connection of each pack. I just assigned them starting with Id 1 and worked my way up to id3. Good luck on your build, cannot wait till next video. I think I may be ordering another pack and the rack for my cabin setup.
@Signature Solar How is your precharge resistor wired? Is in constantly inline and adding resistance to the output terminal?
Nice. It's good to see someone experimenting with electrical circuits.
Another excellent vid Dave. Glad I subscribed!
Looks very impressive - After watching you detailed testing & tear down I went to their site and saw they had 24V & 12v versions with the same capacity even cheaper - the 12v would work brilliant in my little RV - Its so tempting : )
Was the 24v cheaper? Same price now.
How does this do with rattling inside. Want to do one in a off grid bus
@@joshuacaudell7356 rattling? I highly doubt these rack batteries rattle.
Me: “I have enough batteries.”
David: “check out this battery!”
Me: “... well another one won’t hurt”
Yes, this. LOL. I feel the same way when I see a new battery out there.
And we're so glad that you do!
enough batteries ? you can never have enough
you might be on to something.
@@DavidPozEnergy 2021 new 5kwh 48V 100ah LiFePO4 Lithium Iron Battery Pack for BTS Solar Energy Storage Power Wall Battery
$1,306.54 alot 6 x total over 7k call the cheap unless make 100k a year perfamily.
I just came across this fine u tube presentation.first of all Dave Poz is an excellent teacher,I love his sensible and no music and NO WAZZ UP BS .
Super presentation! I understood it well even at 2x speed. I don't know how yet, but I am confident that this may be part of the answer that I've been looking for a power system for my van camper. Thanks!
Wow, this is probably the first all-in-one unit I would actually consider buying rather than just DIYing it all myself as I have done so far.
@@crashoverride5107 so?
@@crashoverride5107 it's still plausible to call it DIY because it's a self-assemble system and the arrangement you use, with solar and inverters can still be DIY.
This isn't a self-contained powerwall like unit, it's just a battery. Sure, it isn't a bunch of 18650s, but as he points out the price is competitive for those without tonnes of free time.
Especially when my diy's end up costing me twice as much by buying mismatched parts and blowing things up 😂
@@BobHannent I personally would not call this in any way DIY. you can technically mount this on a wall (or place it on the floor)and have just 1 battery be a stand alone unit, making it basically the same thing as a powerwall, as there might be some cases(especially offgrid) where you can mount and hookup a Powerwall yourself. this does not qualify as DIY IMO, Its the same thing as buying a preconfigured rack server slapping it on a rackmount and plugging in the plugs. or buying a tv, placing it on a media center and plugging it in to the wall and cable box. sure you placed it yourself, but didn't make it yourself.
@@antibodyarmy It's only DIY if you customize an existing product like OCC, put some ape hangers on it and raked front end and glitter paint and then it's completely custom DIY.
Great testing. One additional test you might want to try is a low temp cutoff test. Don’t know if you have a freezer with enough room. If not, maybe leaving the unit outside overnight would work...
Thanks for the suggestion.
I had mine running during the big Texas freeze in my uninsulated power shed they didn’t get to the discharge temperature cut off. But they did get to the charging cutoff, one started charging at 32f and the other started at 33f.
If the BMS screen is to be believed it may have heaters. David, can you verify if there are heat strips on the cells?
You could undo one of the temp sensors and hold it against an ice cube or dip into glass of ice water.
David, Hello Sir Watching a lot of your videos and wanting to ask if the Gyll battery pack would work for an enclosed trailer? It would see hot and cold weather while not in use, and wondering if the battery would last by being hot/cold while being recharged by solar….. any help would be greatly appreciated
Thanks I was curious about this model. Nice to see inside and get a look at the software , features and your testing. Cheers.
Looking forward for more videos on this product. Keep up the Good Work David.
Thanks. I'm working on it. Currently powering my house with it.
Something like this is exactly what I was looking for. Hopefully more vendors will follow suit and hopefully the maker won't cheap-out on components once they start to get sales volume like so many others have.
-Matt
@Signature Solar
It's an impressive looking build from this side of the camera, David does an excellent job and your reply was perfect. I'll look into your site as I'm interested in a marine environment use with recharging via a generator and shore power.
Thank you for quality
@Signature Solar I need to run full off grid my 4000 sq foot home with 7 ton Mitsubishi mini splits, computers, propane tankless, propane stove, propane dryers, etc. Will these be able to handle the loads required?
The Pylontech US2000C are sold for a similar price, $750-800 for a 2.4kWh 2U rack unit.
@@Psi-Storm where? It is ~900-1100 eur anywhere I found.
@Signature Solar Electric sailboats are becoming a hot thing. How would this work in a bank of LiFePO4 batteries to power an electric motor on a boat?
I really appreciate you explaining the price up front. I hate it when people don't quote the price. This is a pretty good battery, I'm going to consider purchasing one immediately after Christmas. Thank you David.
You are very professional, the battery manufacturing process is very good.
That looks like a great battery & @ a great price point..!
I look forward 2 more videos on this...
Cheers & keep up ur great work.
I'm purchasing similar 100Ah 48V lifepo4 rack mount packs from Meritsun, that also have an ethernet port supporting SNMP management for $1440/piece.
btw, you can daisy chain multiple of these packs to one single USB adapter. you just use small ethernet cables between each one. left port on one going to right port on the next one, left port on the second one going to right port on the third one and so on.
That's actually a good question. RS485 is suited to run serial connections over a long distance and daisy chain should be possible.
However, is it some kind of proprietary protocol/software ? Is there a web based interface available ?
dang, this battery keeps getting more awesome. I think 4 of these for $6K would be a great little 'powerwall'.
Up to 32 devices
@Signature Solar will this support canbus?
I thought so, I should have looked at your comment before saying the same, lol
Love those experiments o you did. Love the insights you gave. Im sold!
It's always nice to get out of a product what it was rated for, instead of the usual getting less out than rated for since many companies expect most consumers to not check.
I have 4 of these batteries and Solar-Ark 12k. These batteries are absolutely great!
James, what is your PV array size and configuration?
Do they work in multiple
@@d2putman I hate when you ask a question and never get an answer.
This is probably a scam.
Yes it is a scam ....😎
You should watch his other videos ...
This guy is terrific .... Almost a wizard
Great test. That looks like a very well-engineered battery. I cringed when you plugged that RS485 cable into your Ethernet jack. I hope your Ethernet port is ok :) I look forward to seeing the full rack setup completed.
Thanks for watching. IDK computers well. It fit.
@@DavidPozEnergy lol @ "it fit"
@@DavidPozEnergy Don't worry about it too much. I've plugged USB cables into Ethernet ports before. And I _do_ know computers well.
As good as that battery looks and the way it performs I truly hope they used the best binned cells they could get there hands on.
I'm really looking forward to your content on how these continue to perform and any warranty information you find out.
Thanks for a great video...
Dang great content man. I cant wait to start my solar panel and charging bank journey someday!
Nobody seems to want to talk about "battery fade" over the cell's lifetimes, and how that interacts with the nameplate "number of cycles" a battery is supposed to yield. These are two important things you can only find out by using the battery, it seems. Maybe after 5 years it will fade to 4 kWh or even 3 kWh, depending on *how* you use it. It's well-known that if you don't use the full capacity (that is, charge it to maybe 90% and discharge to maybe 10%-15%) that you will slow down this "battery fade," and battery manufacturers will admit to this - but there doesn't seem to be good information on voltages, etc., to lengthen battery life. This is important to those of us who are trying to maximize battery lifetime in a working home solar system in island configuration.
That sounds like regulat battery conservation to me, just like EVs and phones. I guess you can set up a system that modifies charge and discharge behavior based on SOC?
Right right! I'm interested in this. I think there are certain parameters recommended for lifepo4s, based on the specific make and model. It's programmed into the bms and possibly the solar charge controller as well? Not sure as I haven't connected my system all together yet.
The G4LL LiFePower4 batteries are rated to 7000 full charge cycles (which just means it takes 7000 cycles to reach 80% of original capacity)
Just build it bigger.
There is lots of information about it everywhere online. You just have to read it.
Hey Dave! Thanks for all your hard work showing us whats up out there! I noticed in the software it mentioned heat film so I was wondering if there was a heating circuit under the battery? and if it was automated to protect in frigid environment? if so what are the temp presets and are they adjustable? Also was there a auto shut off to prevent charging in the same? Maybe use the solar vendor freezer outside to test?
Hey we could just build our own from ali for 1000$ with all the bells n whistles but that is a rocking case! I like em too!
Thanks, Brock in Myrtle Beach SC
I wish I could have seen this a week ago. I just ordered cells and bms to build my own. This certainly simplifies the precess and this battery looks awesome. Thanks for the review. I will still be buying some.
Your welcome. You can always parallel your DIY build with one of these. So long as your DIY build is also 16s LiFePO4.
@@DavidPozEnergy I was thinking the same thing. I was actually planning a 24V system but now I think I'll go 48v in order to do this.
Good call. 48v will make the overall system more efficient, and future compatible.
These look great, the 19" rackmount is just a perfect format for these batteries.
You can use a 120v incandescent light bulb to charge caps also, 40 watt and up work great, when the glow stops, the caps are charged! Nice batteries, can they be bought individual? I think I'm still at the diy level, although the 120ah LG batteries did spoil me a LOT! Building large 18650 banks get old fast!
Never mind I should have known you would cover it in the resource section. Thank You. Great battery gonna go put one on reserve.
Glad you found it. Actually, after I posted Signature Solar reached out to me. Turns out there is a pre-charge resistor built into this battery (aluminum thing right next to BMS). So I didn't need to use a resistor.
David , thanks for the experiment
Thanks David! Considering upgrading our super -C RV to a 24 volt inverter charger setup. One of these batteries would be more than enough in the 24 volt version. Just concerned that I will lose the charging ability from the truck chassis system. Probably not a big deal since I'm going to be throwing about 800 watts of solar on the roof.
"Blow out the capacitors" 😲 There is no risk of damaging the capacitors in the inverter if you hook it up directly to the battery. The question is if the internal BMS or the battery's breaker will trip. I would hope that they can handle the short high in-rush current.
Will sent me your way. Great video, can this be charged solar panel and how would you connect Shore power to it to use it in an RV setting or would it be wise to use it in the RV setting
As always great content thanks.
Awesome video again men 👍🤓
Excellent battery, thanks Dave! I think this is the best option out there as DIY'ing a battery is pretty scary, I talked to a guy the other day who DIY'd his own battery, burnt his garage and part of his house down when the battery overcharged and caught on fire. Going low-cost is great but need to be safe.
@Signature Solar ordered the 12 volt 400ah and they haven't got a breaker
Hi David. A request:
on one of these videos, can you please use an incandescent bulb instead of the resistor to pre-charge the capacitor. Would like to see that method as well. Thanks.
Thanks for the idea.
AHAHA, loved doing this in my electronics class!
Ordered 6 of the 24V 200Ah units a month ago. Liked it so much I ordered another 6 today. My system is 48V but the only ones in stock were the 24V. So I will run 2 of them in series for 48V. I was told the 24V and 48V are identical with the difference being the 24V is divided in the middle. Time to sell my 20 Valence U27-12XP Lithium Battery's!
Pretty impressive battery there... These items may finally push me over the edge into a solar system.
I think they grouped those temps sensors in pairs because one might be a low temp and the other a high temp.
That seems plausible.
or, it could be averaging between the two for better accuracy, or redundancy in case of probe failure.
That seems pretty unlikely. Temperature sensor chips are around $1 each and they can measure temperatures over the range of -40 C to +125 C.
I know the price is good but, for $1500 a correctly pre-made cable to connect to my PC is not too much to ask.
no. a lot of people already have a usb to serial converter with the correct cable. having a standard usb to serial converter is great, you can use it for other devices to.
Actually, yes, since they used a serial port. That's only really useful for enterprise or cloud - there have not been standard serial ports on consumer laptops for a decade or more. Univeral Serial Bus (USB) would have been ok - the jank solution they include is NOT standard USB. The real question I have is, why not wifi AND/or Ethernet? Or at worst Bluetooth? That is what I would expect from a pro-sumer product. Sure, connect the devices together via serial over an RJ45 Cable so they can talk to one another. But these really should communicate either via Ethernet or wifi. Or better yet, both.
They use a serial rs485 which is perfect for this. When you buy 20 of these you dont want to have 20 usb cables or bluetoth or any other crap. Just a single rs485 where you can daisychain each unit and be able to communicate 1000 meters away. On a consumer product the use of RJ45 is probably not a good idea tho.
Seems really well packaged and thought out.
Need rack mount options for all the other required components (Inverter, charger, module for monitoring and connection to network or wifi, ...)
Dude you're just going to save my life I guess. I'm going to be building a datacenter soon in the United States. And I'm kinda conservative about our budget for second backup power. I think I'ım on to something right here tho. Thanks for the amazing content! Keep on rocking!
Your welcome. Good Luck with your data center build.
Alternatives in the same price category: Pylontech (e.g. 3.3 kWh @1260€) or Sunstone (e.g. 10.2 kW @ 3290€), especially for customers in Europe, when shipping costs have to be added.
Too bad they are 0.5C rated
David, can you do a video that lays out a 5KW system using Growatt inverter and these batteries connected to grid showing how you can make a cost effective system on grid off grid. Also if possible show how we can connect a 9000 W harbor Freight generator as backup. This video done right would get over a million views. Thank you
Yes, Please!
I third this request!
These complete package battery banks are awesome! Saves time and money from having to shop around for parts. Cant wait to see where batteries will be in five years. Eventually manufacturers will have to beat out the DIY’ers and they have to come down on prices do it.
great work man 👨 pass the instructions and information ℹ️ very helpful .
Ok, #1 - Batteries out of Stock... imagine that. #2 Signature Solar - Shame that you don't have the usb cable completed for the customer. Such a small item. Poor David had to suffer.
My thought exactly
this is a game changer!
LOL, yeah they could have called it that and it would make more sense.
david thanks for this video i really learnt alot
Thank you for sharing this video, really informative , the battery is also with a reasonable price.
Except James Showalter doesn't pick up the phone when you call him! Their product is a great idea but their company owner really should return his calls.
Good to know
I would love to see some abuse testing on this one
He answered my call, talked my ear off.
When you’re shooting 100 amps through an AWG6... it will definitely heat up. 60 amps is max permissible on 6AWG.
More copper is always a good thing, less copper is a terrible thing.
100% 25mm for 100Amps 16mm for 60Amps
@@timballam3675 Let's get the units right shall we? It's not 16mm, it's an area we are talking here, it's 16mm2 (or 16mm^2).
= 16 mm squared.
mm is a distance and not a cross sectional area.
Which is why the other poster is getting confused.
I just bought 2 24V 200AH LiFePo batteries to replace my 12 lead acid bank ive had since 2014. What an improvement LiFePo makes!. Wired them together for 24V @400AH since I already had a 24V inverter. They charge fully even on cloudy days with 2 panels @265W each so easily as the capacity only drops 15% overnight running my refrigerator, internet modem, CCTV system. No more Lead acid for me!! Ill be adding a couple more in the future
Hi David, I have just put a 48 volt battery together for my 1000 watt electric bicycle. I love the battery except I can't tow it behind my bike! keep up the good work. Your safety is really good.
Have you considered one of those pull behind things they use for children or small animals? And put the battery in that and tow behind the bike?
Buy two and mount them like saddlebags on rear wheel. In a waterproof controller. You’d have. 400 mile range! Lol
Likes like a very nice battery pack. I wish I was rich so I could buy 80kwhs of them.
So 60+kWh for less than the quote I got for 2 power walls, sounds great!
So it's about $300 per kWh and a powerwall has 13.5kWh. Pure equivalent energy capacity is going to cost you $4,500 plus shipping. They sell a cabinet for three of these at $400. Looks like you could get a nice 48 volt inverter charger for about $2k with a 6kW output 120/240.
So you could get a powerwall equivalent for around $7k. If you double up to 30kWh, the inverter/charger might be another $1k and the larger cabinet an extra $100 so you would be at $12.5k . I think about the fact that you can buy a used Nissan Leaf for about $10k with a 24kWh battery in it, albeit probably a little bit degraded.
Actually, an 18kWh battery pack out of a Chevy Volt costs $3k new. That's 9kWh for $1,500. It's Lithium Ion as is the battery in the Powerwall but I think it's an interesting comparison from a price perspective.
The one thing that the Powerwall has is a compact floor space footprint - You can probably put them one above the other on a wall. Guess it depends on what you have, wall space and money or floor space.
@@errcoche
The volt battery cost has doubled. I’m not sure why.
Great videos Dave. I've found a number of them very helpful in setting up my system. I'm very interested to know what software you're using in this video to monitor the battery it appears to be very comprehensive. My software only reads SOC from the inverter which I believe is based on voltage via the inverter and is therefore not that accurate.
This is awesome. I want a few of these for my house!
Get a Powerwall if you can afford it . They are selling it at $428/KWH installed cost.
I bought 6 in the rack. A month ago. This thing is well built.
I purchased 4 and a rack. Excited to test them.
6 for me too, about a month or so ago, but still waiting for the off-grid house to be finished so they're still in the boxes.
Looks like a really solid unit. Anybody know if it has cold temperature shutoff?
I wish I had that kind of cash. That would be so awesome.
Oh man, the secret is out on these batteries. Hopefully Signature Solar doesn’t jack prices!
This is a car jack. Well of course it's a car, but my name is not Jack, it's Greg, and this is my sister Marsha.
@Signature Solar You guys will make a mint if the quality is good and the prices stay as they are. I WILL get 10 at end of summer if these test well! Well done guys!!!!
@Signature Solar good to hear! I plan on getting these later this year!
Thanks to the in-depth evaluation I just bought a 12v 400ah battery for my RV installation. Thanks for efforts David.
Cool. Did the discount work on the 12v version?
@@DavidPozEnergy Yes. And their phone sales support was outstanding.
Thanks. First time I've done a video of one of Signature Solar products, so I appreciate the feedback.
@@DavidPozEnergy My battery came without bolts for the terminals. I am sure the thread is metric. Can you tell me the specs for that thread? Thanks.
M6x1.0
Awesome video! New subscriber and love your channel. THANK YOU!
Thanks for subscribing.
Little tip for ya David, when charging, avoid connecting the clips to the screws, try to connect directly to the terminals, or a copper or aluminum lug.
Also, when you measured the Cel voltage, you measured on the screws, not on the bussbars. It is best to measure on the bussbars to avoid any steel resistance.
If you're measuring the internal resistance then yes, but if you're just measuring voltages with a high-ohm multimeter then the tiny additional resistance from the steel screws have no effect.
I like the concept, but I have some issues. They should provide the right connector for the comms package. The circuit breaker does not provide over current protection. And the cells are only rated for 7000 cycles. Newer cells have up to 20,000 cycles. This is why this unit is only warranted for 5 years. So when comparing price you should take that into account. Update: after reading the specs. you may not have run the over current test long enough.
LFP typical cycle life at 80% DOD is 6000-9000 cycles. Maybe you are thinking about LTO batteries at 20k cycles. Gyll uses cells from Jiangxi Ganfeng which is one of larger and reputable "mine to cell" manufactures.
The real life limit in most power electronics is the electrolytic capacitors. If you look at cycle ratings on Digikey, they are typically horrible!
This is how I built my modules for a 48v setup. I designed a server chassis with Protocase and they did the fabrication. Using batterybackup's 32650s. My first 2 were for a van and I have a 200kwh bank planned when my house is done being built. Not sure if I'll use the same cells but we'll see.
Really helpful video! Thanks so much for sharing.
Man, that could give an e-bike some real range!
just put it into a bag pack
just put it into the cargo area of your cargo bike!
David, Take some Acetone (finger nail polish remover) and remove your old markings from your charge box. Was a really nice trick fro calibrating it!
Thank you for the review and useful info.
Nice gear. Seems like a quality manufacturer with attention to detail.
I love mine in upstate ny have rack and six running my whole house i have on pc to monitor all the cells working 100% jim at signature solar is great fast shipping texas to ny in three days
Are you using these to run a minisplit for heating?
I've had nothing but bad experience with signature solar. They don't stand by their products. Tried telling me GrowWatt inverter isn't made for used leaf battery packs and Sunpower panels. That made me mad. If it's true why not state that nonsense in the description. Which is not true.
can you monitor all six racks with a single computer without unplugging and replugging the cable?
@@kybrancaccio kind of impossible to tell you without more information, but a heat-pump minisplit for heating is no different than for coolinh
@@stickersadd20hp I have to disagree they answer my calls and James walks me threw everything very helpful getting my system up and running and some parts are not from him
Unfortunately the owner of Signature Solar never returns phone calls. Biggest flake... Worst customer service I have ever worked with as well.
David poz you're battery powered plan capacity is good stronger. Nice ⚡⚡👍
Thanks for the great video David ! Reliable info is difficult to find & the way you present all the tech in an easy to digest way makes me feel much more confident . I have always felt like I could not trust the slick used car saleman type guys that I've seen on other channels & you may have gotten me ready for the next step of actually handing over a few bucks & joining this movement to modern self sufficiency ......
Thank you for the kind comment. Comfort level needs to be high before spending money.