It’s gonna work but you’re literally cooking the battery… for those interested I recommend a 5000 BTU AC and three 100Amp batteries in parallel..with a 2k inverter

73% of the rated capacity pulling above 1C for almost the whole test. I say that's pretty good.

Pulling more than 1C from that single battery is going limit the maximum output. I'm looking at a 12v or 24v split AC unit. On high power they pull 40Amps. Low power 20-25 Amps. I plan to cover every inch of my roof with solar (1400-1500 watts of solar) and 600Ah of Lifepo4 batteries. The solar panels will add some shade to the roof which should help to keep the van a bit cooler. Half the split and the pump are going under the van behind the rear axle. In theory the solar panels should allow me to run the AC on low power from lunchtime 1pm ish and top up the 600Ah battery bank fully to let me run the AC for a few hours during the night. Plus run a fridge and some low power 12v LED lights.

Good info professor brad

Just be careful. Those budget 100Ah batteries often don't have BMS's that do well at 100A continuous discharge and its not unheard of for the mosfets to easy bake oven themselves. I was actually surprised yours ran in the hundredteens for an extended period of time but sometimes the 100A BMS's wont shut off until 150A. The general rule of thumb is 100Ah per 1000W of inverting power since the vast majority of those cells have a continuous rating of 1C and a 30 second burst of 2C.There are some cells with 3C and 5C ratings but its usually the 20Ah to 50Ah cells I see with those ratings. 941wh out of 1280wh is quite good at 1C/1.2C. An industry standard 0.2C test will probably yield over 1300wh. What did you pay for that battery? I'm guessing its one of the $300 to $350 Amazon specials? Edit: oh thats not the Jita...man $500 they are taxing. You could almost get a 200Ah with a 200A BMS for that much. I see them for $600 and some change.

Solar is good for your little stuff, phone, laptops, mini pumps and lights. With my $600 propane generator and a 30 gl. tank, I can run my AC for days non stop if I wanted. 😂 I can place the generator inside a sound proof bin with lil' exhaust vent. Quiet, cheap energy. Propane is the best way! Don't have to park in the sun, worry about cloudy or rainy days. Runs my stove, hot showers and AC all night without breaking the bank.

very good explantaion .lion batteries are very powerful

I think that is a remarkably inefficient window a/c unit. Most of those should be drawing between 350 and 600 watts for a small room I would think.

Excellent👍! always Tommy🤠

Also "Inverter Compressor, Inverter A/C" is more or less marketing :) Technically, it's just a variable speed compressor, along with a variable frequency drive. VFD's are generally used in many other industrial and large scale applications that turn motors. It's not super darn fancy when you think about it :P Why am I saying this? it can be confusing in videos where you actually are showing a "Inverter", along with a "Inverter A/C", just to keep it clear. Could mix it up in speech or people can interpret the other thing than intended so hah

Run a feed line off the AC that splits off and feed back into your battery box to self cool it down

Rate of discharge matters.

The LFP battery can handle your AC unit but that high frequency, transformerless inverter will soon become a brick after repeatedly starting your AC unit. High frequency transformerless inverters are not designed to repeatedly power high inductance loads like refrigerators, microwaves, AC units and large power tools.not only will you smoke your inverter bit you can also set you AC unit on fire.

*Replace those inverter fans with Noctua I use them throughout my system, in my 3 Midnite Classic 150's my Iotal DLS chargers, and in the plethora of Inverters. THey move about 20% air but compensate run longer and way quieter.*

What if you connect solar panels to the battery via a charge controller? Will the AC run continuously as long as there is sun light?

I just want to say thank you so much for the instructional video. I’ve been running my own theoretical math on this same type of scenario. Found a kit for my semi truck that pulls supposedly 800 watts and was looking for someone on KZfaq to prove or disprove my theory that I could run it on lithium batteries. I see no reason based on your test that I couldn’t run my ac overnight and my little fridge on x3 300ah lithiums. I look forward to watching more of your videos and sincerely thank you. Also you used a 150amp fuse in your video - did your inverter not come either a fuse built in?

My widow air conditioner takes 400 watts to run… I ran my air conditioner for 11 hours on a 200 amp lithium battery.

Good to see somebody not using a 3,000W inverter on a 12V battery 😄

I love watching this video mines will be here tomorrow I'm so excited..

i think you may put 2 batteries in parallel and use at least 3000w inverter...it will more last longer and safer

I would only run it for Jazzy while in the store probably

Hey Brad! I enjoyed the content of the video. I really liked your battery monitor but didn’t see a link for it. Would you mind posting it please? Thanks!

Researching 12V air conditioning and came across this!

Just set your temp up to 75 vs 60 and get comfortable at that temp so you dont have to have a much battery power because at night it will turn on and off i power are whole tiny house with solar and when you dont have alot of cash..you use what you need not what you want lol

I have a smaller AC unit and run it off 4 100ah power Queen batteries but the wattage of the AC is always below 540 and usually 425 or less.

900wh consumed in about an hour, so you're pushing an average of nearly 100 amps, with spikes well above that number. Yes, with that inverter compressor, you "can" run it from a 100AH battery and a 12v inverter, but you'd be way better off to have a 24 or 48 volt battery, with the same or higher capacity. What you CAN do and what is prudent are often two very different things.

👍🏽Great Information Dude 👍🏽👏🏽✌🏽

100amps is crazy! I wonder what the battery discharge is rated at because that is why the Terminals are HOT the battery is maxing out be careful, peace!

Is there certain search terms to find an inverter style window air conditioner? I like the soft start and variable ramping of the compressor rather than he harsh sounding on/off of traditional compressor units. Thanks!

What I learned from watching these videos is you will be limited to around 2 hours I wonder if it’s a way to have more batteries and then them kick off when near capacity and go to the next battery

Question: what if you had a DC charger working as your powering the A/C ? Would that DC Charger extend the A/C running longer ?

Hey Brad! So your saying I can run one of those with my 2000 pure sine inverter and 2 100amh AGM batteries?

I have 8000 BTU with 500 ah. I am close, probably need an additional 100 ah to be safe. The cool thing is going zero only means refridge is nada for 2 hours max? I may try to separate my fridge, a 50 ah Jackery with a compressor 12v refreidge? It is an Everchill...it might work all night with 50 ah?

A wind a/c is pulling over 100 amps? Wtf?

Impressive

Would it have helped any if the power cord wasn't spliced together? And ...at least you didn't blow the ac unit

Thanks for sharing

What is the black status display? Looks like a nifty display. What is the lowest power draw that you can do? Maybe reduce the fan speed and econo mode?

inverter was screaming

12,000 btu is overkill you dont need such a big air conditioner for such a small room

Ty sir

This was very informative. I was wondering, could you be able to charge the battery at the same time as using it? Would it be possible to keep the charge high enough to not drain the battery completely? My daughter cannot use a window unit in her house. It is an old house and it is very hot already. I am also from Texas and this heat is hell.

Something got to be wrong here pulling a hundred amps ??? From where the battery and bms ? My 12,000 BTU mini split is 10 amps AC Max about 1100 w 10 amps DC side 40-50 I'm guess but where does a 100 amps my solar is 24v tho probably makes a difference I guess just saying that's a lot what seer and BTU is that again ?

What temperature are you trying to keep your small space at? I've mostly used a 5K BTU window unit my whole life in a small apartment and it worked fine. How come people need much more for smaller spaces?

Is it real that the correct low battery voltage rate of 12v lifepo4 battery is 10v? I just set my LVD alarm to 12v and not 10v

Is there a way to avoid going through the DC to AC inverter that then goes to the AC to DC inverter on your air conditioner? Can we somehow have an option skip the inverter on the air conditioner side so we can skip the inverter connected to the battery? Inverter is great when connected to the grid, but seems redundant when connected to DC power from battery.

Could you use your set up to run a standard side by side 2 door fridge. 1 or more 100ah batteries. Curious how much battery and inverter you need to run one. What's your opinion on getting all the battery and inverter first and recharging system once or twice a day w generator. Then slowly add solar as alt input.

You know it

Don`t they sell air conditioners that draw 500w or less?

invertor sounds like it will explode. Doubt that’s safe to run in a van on a daily basis

Hey Nomad Brad! Unique situation- I have an inverter A/C, same 14k btu on 110-120v. If my solar power without a battery stays high enough, can I directly connect the panels to a charge controller, and the charge controller to pure sine inverter (with a fuse in line too)? Then just expect the A/C to run for as long as I have enough direct sunlight? I can't currently afford a large battery setup, and I'm concerned doing something like this would overheat a battery (or being lithium, catch fire- I don't trust them or safety mechanisms inside.) Would it run? And the charge controller keep the output to inverter stable? Or would maybe 2 or 4 batts to run at 24v or 48v solve my overheating concerns? I doubt I could afford that but would be good to know! Thanks!!

Are you an electrician by trade you got to know what your doing ,not every one can wire this up ,jimmy Australia

This AC is energy efficient ?

Do you think this would work with a dual battery set up powered from the main battery with a battery isolator, and a high out put alternator?

The load of an air-conditioner on lithium ion layers a recipe made in hell

Need a 12,000 btu in a mini-bus in the Texas sun. 🙄

Good stuff! I just found your channel. Thanks for running this test. I have a 5k BTU unit for my van that pulls around 350 watts. I'm considering a similar setup so I can ditch the generator and still run my ac without the noise. If my horrible math is correct, to run my ac for 8hrs, I would need a minimum of 300ah? It's very likely I got that wrong so if someone could correct me on that, I'd appreciate it. Thanks! Now excuse me while I go hit that subscribe button!

How much for the off grid system? Not the ac.

Useless to the viewers you targeted, why not just test the 400-500w mini split you mentioned would be of use. Anyway 100ah would last 2-2.5 hours. So half as many batteries for 8 hours.

Why would you have a 12k Bru that wants almost 1500w it’s a box truck. Get a 5k btu they use 350w usually. That’s silly

About 90-92% inverter's capacity is about right b4 auto shut off kicked in。🤔

If you use a battery hard it wont last long.

why that AC pull so many amps? Is that normal ??

Can you add a link for your AC?

get about half an hour out of 100 ah ?

How how many hours were you able to run it like this

If I run my Dometic fridge at the same time?

HOW MUCH? DOES THAT WEIGH. ABT 50LBS; MEANS LADIES . CAN NOT. PICK IT UP. IN A STACK. TO MOVE IT.

how long it takes to recharge

Is there any maximun load for the battery?

Bro I have a 2 ton A/C, what inverter do I need and batteries?

The info you give is if your air conditioner was running full blast all night. Fortunately, in a van or bus, it will not be running full blast constantly. It will throttle down when you get to the desired temp thus using much less power. I feel that your statement that you would need 800 ah to run an ac all night is erroneous.

Here is a power consumption test with a small Midea inverter AC and a Jackery 1500 kzfaq.info/get/bejne/qrFiYK5mzKmaeqc.html

to much bs not enough educated info

I had the same shunt, it was max 100A, it would stop at 99A I guess you have a 200A version?

I wonder if we can just use car built in air conditioner instead of buying another separate one?

Impressive