This is fantastic. Would it work the same using 24v lead acid batteries in series? I really want to try this with my solar setup. Would love to get rid of the inverter.
Yes lead acid batteries would definitely work! if you connected enough of them in series to get a high enough DC voltage. You have to experiment to see witch appliance can operate directly on DC. I only used 9v batteries to do the experimental testing, but bigger battery would be the practical way to do it 😉
@@MyProjectBoxChannel Thank you for the quick reply. keep up the good work. Big Clive definatly has some competition! Would love to see a video on running leds at different voltages ie 6-12v run on 24v system using resistors.
@@MyProjectBoxChannel Thank you for this fantastic channel. If using led light strips directly to a battery would it be beneficial to add an extra resistor?
@@ArnookieVR if you're using 12-volt LED tape it should have built-in resistors. So you should be able to run it directly on a 12-volt battery. You can add a series resistor with the LED tape. This will make it slightly dimmer, but the LEDs should last longer on the lower current. Also when the battery is being charged the voltage can be as high as 14 volts. The resistors on the LED tape is designed for 12 volt operation, so 14 volts is a little bit high but still okay. You can also connect two equal lengths of 12-volt LED type in series, to run them directly from 24v. 5v led tape can run directly on a USB phone charger. Some striplights panels do not contain any resistors so you need to add resistors for current limiting for the desired voltage you operating them on.
@@lookuptv6755 what would you like to see? individual LEDs powerd from different voltages? Or LED tape (striplights) powered from different voltages? Maybe connecting more than one LED in series, for higher voltage operation.
Not long, just under an hour. But it was just an experiment not really a practical solution. And to prove my idea that you could run appliances directly on batteries. DC
I don't remember the exact figures different appliances would cut-out at different voltage thresholds. Some of them you could push pretty low, much lower than stated on the label.
@@MyProjectBoxChannel I guess it would be down to the SMPS offline switcher IC and its bootstrap circuit, well that's getting into more detail. Anyway great proof of concept.
No I'm sorry. The 9v batteries won't power a air-conditioner. The TV was just a fun experiment but not very practical. But bigger batteries will be more practical, like for instance multiple 12v car batteries connected together.
What if u jump the AC rectifier board to DC because i mean most circuits in our appliances convert AC to DC in order for components to function. Inside our appliances there are always step-down transformer than rectifier than capacitor for Halfwave cycles than distribution of small different voltages. Like computer after rectified the outputs are like 5v, 12v,24v 50v Vdc for PCB that why we just connect cellphone and charge same time. So what happens when u connect 12v direct after rectifier
Not a surprise, as you clearly show in the diagram, a smps is basically an inverter A friend of mine tried powering a PC power supply from as low as possible, he got it down to about 20 volts reliably, though he only had a light load on the output. Many electronic devices use SMPS and often list a wide range of voltages, just like the dell psu. Some cheap phone chargers or led mains lamps use a series capacitor, so those won't work either.
So what made you think of running items from DC?? And if you can run items that need 220v AC, how about American items that only require 110v AC?? Thanks for the video, very good, How about a battery and a DC buck boost.
I just wanted to get people thinking about about DC, and how AC is not as important as it used to be. As for 120Vac in the US, you have to kind of think of the DC equivalent being the peak voltage of the sine wave, so about 170Vdc. A boost converter is a great idea. It's much simpler and more efficient than a sinewave inverter.
@@MyProjectBoxChannel I am a few weeks from selling my current house, and will be building a new home that will be a DC wired, PV house, with point of use inverters for only a few items - microwave, refrigerator, etc. Is there anyway I could contact you directly?
Im wanting to wire 360 vdc solar panel string into an inverter type air conditioner. Same idea. It seems usual solar systems do some silly steps. Dc to ac to dc to ac to dc again. Craziness.
with 22 pieces of 9 volt box battery capable of turning on the laptop. can it also turn on a mini computer with 90 watts of power...? if so, how many hours can it last? or maybe it takes how many batteries to turn on the mini computer?
@@MyProjectBoxChannel does it take up to 1 hour, with a 22.9 volt battery, or does it need more battery? or maybe you can use a 3.7 volt 18650 battery, you can use a parallel circuit, do you need an additional module? Please give me a solution, I have a mini computer with a keyboard and a portable mini usb monitor, I want to use the battery like a laptop, at least 2 hours is enough, thanks
I have a 120/240v IGBT (microcontroller controlled)welder and I was been really scratching my head if it will work on dc, since it's 7kw and inverters on 7kw is not particularly cheap) I think I will try it thru a fuse.
it should work, but it all depends on the design of the circuit. Put an electric heater in series for current limiting. Just to test if it turns on okay. If it has a setting switch, set it to 240v. Some power supplies have a voltage doubler mode for 110 volt. th-cam.com/video/D9he-mVUEX4/w-d-xo.html
Check with electrical engineers. DC to AC is done mainly to avoid thick DC wires afaik, which on a small solar setup won't be too much of an issue anyway. Avoiding the inverter is a dream come true for anyone electro-sensitive. It's the worst part of the solar system for those people. Charging a phone with 120V DC is ... well. It can be charged from USB 5v? , so why bother to use the charger?
The phone charger was just for testing another appliance with a switch mode power supply. 12v to 5v is simple enough, like a car cigarette lighter phone charger. It's just interesting to see how many appliances will actually work directly on DC.
Yes Correct! But it's mostly old fashioned transformers and some types of motors, that strictly require the 50hz/60hz AC power. Most modern appliances will work on both DC and AC
All good but extremely dangerous You can arc weld at 50 volts. With a 48volt system you can easily power most dc appliances and electronic goods using step down converters and only use small inverters where needed.
Switching Higher DC voltages ⚡️ can be problematic, due the the arc not automatically extinguishing, like it would with a AC voltage, because of the "zero crossing". But this can be dealt with by putting multiple switch contacts in series. You can also add a "extinguisher magnets" that help to push/blow out the arc. You can add a "explosive" master disconnect fuse(electronicly controlled, with arc fault detection) I like to design my own solutions, but commercial solutions are available. I still think that it will be feasible for a small off-grid project experiment. Try to do it as simple and safe as possible. I want to try and eliminate as much electronic modules as possible failure points.
Unfortunately It won't work because the fridge motor requires AC to operate. Some of the new energy efficient fridges have inverter motor drives, and they might run on DC.
@@MyProjectBoxChannel I seen (repaired, actually) an electrolux drive what have an inverter driven pump, I think this one will work. Can you test out obviously applience what will not work on DC, as well some barkers, does it gona just trip a breaker or what? Let say AC motors, fridge, old washer?(most of the modern "direct drive" units runs bldc motors, so they should work). AC Dryer will work, but I think you still gonna need to feed a motor what turns a drum with AC.
@@pashko90 you would have to pick your appliances carefully. AC motors( induction motors) and transformars won't work and definitely trip the circuit breaker! brushed universal Motors work fine on DC and AC.( Like old traditional vacuum cleaners). You will also need DC capable switches fuses and circuit breakers. I think it would be possible to have a DC powered house with some careful investigation and work.
@@diannesmith7879 the problem is, 9-volt batteries don't have a very high energy density. You will lose some power charging them. Then lose even more, transferring that power into the scooter battery pack. And buying so many 9v batteries is not going to be cheap. I don't think they will hold enough charge, to fully recharge your scooter anyway. How how many were you planning on stringing together?
Just find someone selling some cheap Deep cycle 12v lead acid batteries. 9V Alkaline batteries are crap, they only have 500mah, NiMh rechargeable 9V's only have about 350mah. They'd give your scooter enough power to get to the end of your street... LOL
I thought it was pretty cool as well 🤔. I don't think it's a solution for everyone. It's nice to know that you can operate so many appliances directly from DC. It seems ideal for a very basic off-grid system. Even if it's just to do the lighting and TV. It's not like Eskom becoming more reliable 🤣
This is fascinating !
Thanks for doing this,
Thanks I have been searching for a video like your
This is fantastic. Would it work the same using 24v lead acid batteries in series?
I really want to try this with my solar setup. Would love to get rid of the inverter.
Yes lead acid batteries would definitely work! if you connected enough of them in series to get a high enough DC voltage. You have to experiment to see witch appliance can operate directly on DC. I only used 9v batteries to do the experimental testing, but bigger battery would be the practical way to do it 😉
@@MyProjectBoxChannel Thank you for the quick reply. keep up the good work. Big Clive definatly has some competition!
Would love to see a video on running leds at different voltages ie 6-12v run on 24v system using resistors.
@@MyProjectBoxChannel Thank you for this fantastic channel. If using led light strips directly to a battery would it be beneficial to add an extra resistor?
@@ArnookieVR if you're using 12-volt LED tape it should have built-in resistors. So you should be able to run it directly on a 12-volt battery. You can add a series resistor with the LED tape. This will make it slightly dimmer, but the LEDs should last longer on the lower current. Also when the battery is being charged the voltage can be as high as 14 volts. The resistors on the LED tape is designed for 12 volt operation, so 14 volts is a little bit high but still okay. You can also connect two equal lengths of 12-volt LED type in series, to run them directly from 24v. 5v led tape can run directly on a USB phone charger.
Some striplights panels do not contain any resistors so you need to add resistors for current limiting for the desired voltage you operating them on.
@@lookuptv6755 what would you like to see? individual LEDs powerd from different voltages? Or LED tape (striplights) powered from different voltages? Maybe connecting more than one LED in series, for higher voltage operation.
Wow, I wouldn't have guessed the 9v batteries would supply enough current. How long did the battery pack last?
Not long, just under an hour. But it was just an experiment not really a practical solution. And to prove my idea that you could run appliances directly on batteries. DC
9v batteries can supply about 0.5A for 1 hour, so 0.5A X 200volt = 100w for 1 hour. Give or take. The TV is probably just over 100w
Nice experiment, I was wondering how far you could reduce the DC voltage down and the appliance would still work.
I don't remember the exact figures different appliances would cut-out at different voltage thresholds. Some of them you could push pretty low, much lower than stated on the label.
@@MyProjectBoxChannel I guess it would be down to the SMPS offline switcher IC and its bootstrap circuit, well that's getting into more detail. Anyway great proof of concept.
How long will the batteries last for the TV. Can 9 v. Batteries run an air conditioner? Brilliant experiment. Thank you.
No I'm sorry. The 9v batteries won't power a air-conditioner. The TV was just a fun experiment but not very practical. But bigger batteries will be more practical, like for instance multiple 12v car batteries connected together.
What if u jump the AC rectifier board to DC because i mean most circuits in our appliances convert AC to DC in order for components to function.
Inside our appliances there are always step-down transformer than rectifier than capacitor for Halfwave cycles than distribution of small different voltages.
Like computer after rectified the outputs are like 5v, 12v,24v 50v Vdc for PCB that why we just connect cellphone and charge same time.
So what happens when u connect 12v direct after rectifier
Not a surprise, as you clearly show in the diagram, a smps is basically an inverter
A friend of mine tried powering a PC power supply from as low as possible, he got it down to about 20 volts reliably, though he only had a light load on the output.
Many electronic devices use SMPS and often list a wide range of voltages, just like the dell psu.
Some cheap phone chargers or led mains lamps use a series capacitor, so those won't work either.
20 volts! Amazing 😂🤯 I have successfully run some GU10 LED lamps down to 12v! ( The type with a SMPS inside)
So what made you think of running items from DC?? And if you can run items that need 220v AC, how about American items that only require 110v AC?? Thanks for the video, very good, How about a battery and a DC buck boost.
I just wanted to get people thinking about about DC, and how AC is not as important as it used to be. As for 120Vac in the US, you have to kind of think of the DC equivalent being the peak voltage of the sine wave, so about 170Vdc. A boost converter is a great idea. It's much simpler and more efficient than a sinewave inverter.
@@MyProjectBoxChannel I am a few weeks from selling my current house, and will be building a new home that will be a DC wired, PV house, with point of use inverters for only a few items - microwave, refrigerator, etc.
Is there anyway I could contact you directly?
@@geekstradamus1548 Oh wow that is exciting and interesting 🤔. You can contact me on Facebook messenger. facebook.com/My-Project-Box-105438131355367/
Im wanting to wire 360 vdc solar panel string into an inverter type air conditioner. Same idea. It seems usual solar systems do some silly steps. Dc to ac to dc to ac to dc again. Craziness.
Yes straight DC seems more logical. Maybe in the future it will be more common.
with 22 pieces of 9 volt box battery capable of turning on the laptop.
can it also turn on a mini computer with 90 watts of power...? if so, how many hours can it last? or maybe it takes how many batteries to turn on the mini computer?
It is possible to run your computer on 9v batteries, but not for very long! I definitely do NOT recommended it, it's not practical.
@@MyProjectBoxChannel does it take up to 1 hour, with a 22.9 volt battery, or does it need more battery?
or maybe you can use a 3.7 volt 18650 battery, you can use a parallel circuit, do you need an additional module?
Please give me a solution, I have a mini computer with a keyboard and a portable mini usb monitor, I want to use the battery like a laptop, at least 2 hours is enough, thanks
I have a 120/240v IGBT (microcontroller controlled)welder and I was been really scratching my head if it will work on dc, since it's 7kw and inverters on 7kw is not particularly cheap) I think I will try it thru a fuse.
it should work, but it all depends on the design of the circuit. Put an electric heater in series for current limiting. Just to test if it turns on okay. If it has a setting switch, set it to 240v. Some power supplies have a voltage doubler mode for 110 volt. th-cam.com/video/D9he-mVUEX4/w-d-xo.html
@@MyProjectBoxChannel Where is no switch, it's a "smart" welder, detects voltage automatically.
Check with electrical engineers. DC to AC is done mainly to avoid thick DC wires afaik, which on a small solar setup won't be too much of an issue anyway. Avoiding the inverter is a dream come true for anyone electro-sensitive. It's the worst part of the solar system for those people. Charging a phone with 120V DC is ... well. It can be charged from USB 5v? , so why bother to use the charger?
The phone charger was just for testing another appliance with a switch mode power supply. 12v to 5v is simple enough, like a car cigarette lighter phone charger. It's just interesting to see how many appliances will actually work directly on DC.
Switching relatively hi DC voltages is more difficult as well. Arcing when switching DC is more problematic
AC or DC has no significant bearing on wire diameter.
@@seemonster77 You are correct. High voltage = thinner wire for a given wattage (AC or DC)
@@seemonster77 In actual fact. DC is I bit better, with AC you have something called the skin effect.
Just a question, dc has no hz , while ac has 50hz/60hz .
Yes Correct! But it's mostly old fashioned transformers and some types of motors, that strictly require the 50hz/60hz AC power. Most modern appliances will work on both DC and AC
All good but extremely dangerous
You can arc weld at 50 volts. With a 48volt system you can easily power most dc appliances and electronic goods using step down converters and only use small inverters where needed.
Switching Higher DC voltages ⚡️ can be problematic, due the the arc not automatically extinguishing, like it would with a AC voltage, because of the "zero crossing". But this can be dealt with by putting multiple switch contacts in series. You can also add a "extinguisher magnets" that help to push/blow out the arc. You can add a "explosive" master disconnect fuse(electronicly controlled, with arc fault detection)
I like to design my own solutions, but commercial solutions are available. I still think that it will be feasible for a small off-grid project experiment. Try to do it as simple and safe as possible. I want to try and eliminate as much electronic modules as possible failure points.
Would it damage my fridge to test it ?
Unfortunately It won't work because the fridge motor requires AC to operate. Some of the new energy efficient fridges have inverter motor drives, and they might run on DC.
@@MyProjectBoxChannel Yeah I thought so. Still astounded by this experiment ! 👍
@@MyProjectBoxChannel I seen (repaired, actually) an electrolux drive what have an inverter driven pump, I think this one will work. Can you test out obviously applience what will not work on DC, as well some barkers, does it gona just trip a breaker or what? Let say AC motors, fridge, old washer?(most of the modern "direct drive" units runs bldc motors, so they should work). AC Dryer will work, but I think you still gonna need to feed a motor what turns a drum with AC.
@@pashko90 you would have to pick your appliances carefully. AC motors( induction motors) and transformars won't work and definitely trip the circuit breaker! brushed universal Motors work fine on DC and AC.( Like old traditional vacuum cleaners). You will also need DC capable switches fuses and circuit breakers. I think it would be possible to have a DC powered house with some careful investigation and work.
I was thinking of using rechargable 9v to charge my 48v scooter and recharging the 9v by solar. Any suggestions
I don't think it's very practical or efficient. Couldn't you just charge the scooter with solar directly. Possibly using a buck-boost converter.
Yes, been working on that however, the large panel is to cumbersome while an array of rechargables not. Then charge them up after.
It would at least double my range
@@diannesmith7879 the problem is, 9-volt batteries don't have a very high energy density. You will lose some power charging them. Then lose even more, transferring that power into the scooter battery pack. And buying so many 9v batteries is not going to be cheap. I don't think they will hold enough charge, to fully recharge your scooter anyway. How how many were you planning on stringing together?
Just find someone selling some cheap Deep cycle 12v lead acid batteries.
9V Alkaline batteries are crap, they only have 500mah, NiMh rechargeable 9V's only have about 350mah.
They'd give your scooter enough power to get to the end of your street... LOL
Maar my magtag, dis pretty spif
I thought it was pretty cool as well 🤔. I don't think it's a solution for everyone. It's nice to know that you can operate so many appliances directly from DC. It seems ideal for a very basic off-grid system. Even if it's just to do the lighting and TV. It's not like Eskom becoming more reliable 🤣
9v 🔋⚡🔌💡😂😂🤣🤣👏👏🤌🤌💪💪