1000W Inverter: How Many Batteries You Really Need

[@cleversolarpower]

🎁 Free diagrams: cleversolarpower.com/free-diagrams 📖 My best-selling book on Amazon: cleversolarpower.com/off-grid-solar-power-simplified 💵Use coupon code: clever6 to get 6% discount for Litime batteries: cleversolarpower.com/litime (cheaper than amazon)

[@Abiola-y3z]

Your videos are so succinct and serve as refresher for me as an experienced Solar PV Professional. However, this particular video needs reveal. For example, if an inverter is rated 12V/1000W (assuming 100% efficiency), it means it can supply max. 83A. Then a typical Lithium battery rated 12V/100AH at 1 C rate will draw maximum of 100A. The system will definitely overheat because what is required for the battery charging 100A is higher than what the inverter can supply which is 83A at 100% efficiency. Thanks.

[@cleversolarpower]

83A x 1.11 (efficiency of inverter) = 92A. Yes, the BMS will get warm, but that's what it's rated for.

[@jab376]

​@@cleversolarpower what happens if we use 4 x LifePO4 batteries with 1000 watts inverter? Will also overheat like Lead acid battery?

[@3sheds]

Thank you for simplifying and sharing your knowledge. As a direct result of your previous video, I have abandoned my Lead Acid, and moved to a Lithium to power my 1000w Inverter. It works perfectly. All I need now is for spring sunshine to come 🤣

[@AlexanderRodriguez-ym7we]

To play it safe, just get a more powerful one. It's better to be over than under.

[@budmartin3344]

To get 1000W from the AC output of the inverter, the input power to the inverter will be higher than 1000W due to the inverter efficiency, 80% is typical, so the current draw from the battery will be 83A/0.8 = 103A.

[@cleversolarpower]

Correct, when sizing wires and cables we use a 1.25 factor to account for this. I didn't include it in this video because it would make it more complicated.

[@2011italianoboy]

Ok, I'm new to inverter, solar-powered, and batteries. Your video explained it well. I WAS going to get 3k watt inverter with just one LiFePO4, rated at 100a. I know now that I would need at least 3 100amp batteries to work with a 3k w inveter.

[@cleversolarpower]

Yes, I also made a video about how many batteries for a 3,000W inverter. You can check it out.

[@jimmybrad156]

might want to go 48v.

[@jerryndembeka7682]

Please do another calculation video with 2000W inverter with 24V batteries. Your videos are very helpfully. Thank

[@cleversolarpower]

Thanks, I feel like repeating myself when I do that video. It's the same principle over again. 2000W on 24 will draw 83A. Lead acid needs to be 24v 400ah, and lithium 24v 100ah.

[@tlalotoani]

So, if I´m using my system to power 3 10w light bulbs and a 50w TV, Is the same? My guess is that IT ISN´T

[@cleversolarpower]

The total power consumed per day matters in watt hours.

[@markissboi3583]

Average person buys a good inverter to run off your car plugs into ciggie lighter socket & wonders why car catch fire :) draw on small wires bad hot like using a welder with an extension cord wound up on a spool Melts ive seen this happen in the 80s at work if we didnt make mistakes we wouldnt learn anything ok

[@cleversolarpower]

Better learn through a KZbin video than a burning car i guess.

[@BenjieEng]

Thanks for this video... I've got the answer to my question 😂

[@brandonraybern9975]

400ah lifepo4 with 2000W intverter...should I experience any issues being that much more on my battery bank?

[@cleversolarpower]

2000W/12V=166A*1.25=208A If your bms can handle 200A, then it's ok.

[@rocktech7144]

Take your four batteries and turn them into 2p2s for 24 volts. Use a 24volt inverter and smaller wire is needed.

[@cleversolarpower]

I have discussed that in my video about a 3000W inverter. If you have lead acid, you still need 4 in parallel to respect the C-rate. If you want a 24V system, then you need 8 batteries in a 4S2P configuration.

[@rocktech7144]

@@cleversolarpower I thought you were talking about 1000w. I just use 8 230A lithium cells and they run my shop and cabin with 3000w.

[@mynameisprivate158]

Yea but why can't I have 2 12v batteries connected to a 2000w inverter so the pull is 83w from each battery

[@cleversolarpower]

@@rocktech7144 3000W/24=125A (okay-ish) 230Ah*1C=230A -> under 125A, so C-rate is ok.

[@cleversolarpower]

@@mynameisprivate158 Your current will be 166A, which in my opinion is too much. It will work, but not as good as a 24V or even 48V system. I have a video about that upcoming.

[@ferencszabo3504]

Cmon, you gonna deep discharge the batteries? 😅😅 The lead batteries are the worst, you can only discharge it for 25%, the rest of it 75% must remain in the battery! They are very inefficient! The Lithium has its own quirks of course!

[@cleversolarpower]

Lead acid should be discharged to 50%. Lead acid still has its applications, but lithium is cheaper in the long run.

[@TUVIX3]

I like your video but I can't figure out how many batterys I need. I want to power a computer pulling 1500w at the wall at night. If I have a solar pannel charging the batterys during the day? Is it even posible to power for that amount of time?

[@cleversolarpower]

Check out my video about sizing an off grid solar system. It will tell you how.

[@RobinMuric]

Can you tell me how many batteries I need for a 8000 watt inverter? I tried to start up a shallow well 110 water pump but it would not work. I only have 4 rv lead acid batteries in parallel. Do I need more? Thank you.

[@cleversolarpower]

You can repeat the calculations shown in this video to your own system. You will definitely need more than 4 lead acid batteries. Why did you even get a 8000W 12V inverter. Bigger is not better.

[@RobinMuric]

@@cleversolarpower I found out that it is not an 8000 but a 4000/8000 peak.

[@Electronzap]

Good info.

[@cleversolarpower]

Glad it was helpful!

[@robertcollins5713]

Great info possible the first video I have been able to understand Thank you

[@JD-rp1fx]

Is that the required battery sizes if you run the inverter at max power? If your load is only say 200A (a fridge and some lights) you won't place a big draw on the battery, mostly inverter on idle.

[@realflow100]

I have a super budget cheap universal brand 100 amp hour capacity 12 volt sealed agm lead acid battery paired with a 1000 watt pure sinewave inverter and it works beautifully. No problems. Never took the battery below 80% depth of discharge. and it handles loads like window air conditioners. vacuum cleaners. computers. and more. with no problems. powering it for a few hours. Doesn't get hot. Voltage drop is not a problem. I used thick 1/0 awg gauge cable so even under the load of a full size window air conditioner it powers it like it's not even there. It is about 3 years old and still works like new. I respect the batteries maximum capabilities by checking the manufacturers specifications on it. and it is fully capable of handling anything I throw at it when properly set up and used correctly. I use it as a backup emergency power generator setup. where it is kept charged and maintained when not in use. and fully charged and ready for use if there is a power outage or other emergency where we need significant portable power. it is very cheap and budget but works great.

[@junior4246]

i have a 1000w Renogy inverter with a 280ah fogstar drift lithium battery is this any good ?

[@dadybig6522]

To long just say how many

[@cleversolarpower]

And learn nothing?

[@loumusa9124]

Thanks for the video. As a result I want to replace both my deep cycle 100amp lead acid batteries with 2 Lithium 100ah batteries. My inverter is a Sensata Technologies CSW1012 1000W Inverter. Will this set up work for my situation?

[@cleversolarpower]

Will work great. You will have to adjust the charging parameters of your charge controller to match the voltage of lifepo4.

[@kasperoner6988]

What if I’m using it on my truck a 1000w inverter and I’m connected to my alternator my inverter has 6 fuses on it. What size wire should I use? And I will be using my inverter only when my truck is running and the distance from alternator and the inverter is 6ft. So what size wire would I need?

[@cleversolarpower]

Probably 4awg welding cable. Check the manual of the inverter as well.

[@BenjieEng]

I have been using 12v 150ah lead acid battery on my 1000w inverter, and the results after 6 months, now, the battery drained in 30 minutes in 200w load.

[@cleversolarpower]

0.5h*200W=100Wh. Your battery can deliver 12V*150Ah*0.5=900Wh. So if the battery only delivers 100Wh while it should be 900Wh, then your battery is dead.

[@victorjoseph8948]

IF i only charge my lipo4 12v 100ah battery with solar panels i do not need the invertor right? for i just want to only charge the battery for augmenting my Bluetti EB3A 268Ahcapacity and have 1080 usable Wh with my EB3A battery. is this correct? or am i mistaking? 1080+268= approx 1300Wh. instead of just the 268 watts. since the EB3A has a charge controller mppt integrated.

[@cleversolarpower]

If you don't need AC, then you don't need an inverter.

[@tedjelsema782]

does battery amps effect pv controllers?

[@jackfromthe60s]

I like your videos. I just received your free diadgrams and am working my way through them. On page 5 of the free diagrams you say a lithium battery can provide a current of 0.5C. But at 2:10 in this video you say a lithium battery can provide 1C. Can you please clarify?

[@cleversolarpower]

Some lithium batteries are rated for 0.5C, but nowadays, this is 1C. I will change the document. Thanks for notifying.

[@grahamjohnbarr]

Ok, I'll start again. I have 4 x 12V x 300W In Series Parallel Solar Panels feeding into a Vevor 12V 60A Controller, feeding into 4x 12V x 120Ahr Batteries, In Series Parallel configuration, giving me 24V 240Ahr. The Batteries feed into a 12000/6000W Inverter. Will only having the 4 x 120Ah in Series Parallel create a problem, or do you think that will work ok?

[@cleversolarpower]

6000W/24V=250A, the max your batteries can deliver is 240A in a 2S2P configuration. So it will work. However, you should have better used a 48V system. Check my video 12,24 or 48V battery system.

[@grahamjohnbarr]

@@cleversolarpower Thank you.

[@MegaCyrik]

Im guessing you know better.. so... Why would you say lead acid is 0,2c and lithium 1c? My old lead is 0,33c but higher is quite common. I often run into 0,5c while browsing. Also lithium goes all the way up to 100c and probably higher. Some are lower than 1c thou. Most of my own are 3-5c. I'm just curious why you say 0,2 & 1c.. why not just teach people to examine their bats or examine what to buy.

[@cleversolarpower]

Checkout the data-sheet of the battery. Most lead acids are tested at C20 which is 0.2C. that is then the capacity. You can discharge quicker at a higher C rate, but then the capacity is reduced. Look at trojan battery data-sheet which shows it very clearly. Lifepo4 batteries are discharged at 1c and then the capacity is based on that discharge rate. Check my video about C rate.

[@mmawar4825]

I need to install 1000 wat sostem 1 kw natery storage lothium please jelpe how to prosode woth dhe stiif i meed to by

[@cleversolarpower]

I just made a video about it.

[@victorgallardo9763]

Thank you very much for the video, I am learning a lot, but it is not clear to me if a 200Ah (lithium) battery would be better than a 100Ah? Would it be more efficient?

[@cleversolarpower]

Having a larger battery will put less stress on the battery. One battery will draw 85A while a second battery in parallel will only draw 43A per battery. So you put less stress on the battery, leading to a longer lifespan.

[@bjarnenilsson80]

Imigh be stupid but is thst fuse before or after the inverter? That is on the av or dc side

[@cleversolarpower]

There are no stupid questions, only bad teachers 😂. It's before the inverter on the DC side. Breakers are used on the AC side.

[@geraldgm1217]

Awesome 👌

[@evanemerson89]

Thankyou

[@figuretech547]

What bothers me here is that in all the calculations how can one tells factors like How long will the Inverter supply the load capacity How long the battery will take before it is full and of course how long before the battery charge controller or inverter shutdown when i reach my targeted depth of discharge. Please help

[@cleversolarpower]

That depends on your load analysis. Check my video about it.

[@figuretech547]

@@cleversolarpower please can you do a video about it Sir. I'm a big fan. Have almost watched all your videos

[@HendrikSteenkamp-l4b]

Cant i connet 2 inverter 1 500w and 1000watt up batery 12vlt 100ah

[@cleversolarpower]

if the inverters cannot communicate with each other, don't wire the outputs together.

[@AenesidemusOZ]

Great content. 👍

[@davef.2329]

Well done. Thanks.

[@user-qc6yq1jh4j]

how to tell what the battery is agm or lead acid or deep cycle or lifium ?

[@cleversolarpower]

The battery will tell you 😉

[@user-qc6yq1jh4j]

that if the label is still there

[@ashiepfrancis8503]

Please can I use 120ah battery and 2000w invater to power up 180w tv

[@cleversolarpower]

Yes, but make sure you follow the calculations in the video.

[@ashiepfrancis8503]

Thank you

[@ashiepfrancis8503]

How many watt solar panels are recommended for 2pc of 120ah battery

[@nakorau]

a video on DCDC battey chargers. please.

[@cleversolarpower]

Thanks for the suggestion 🙏

[@nakorau]

@@cleversolarpower i assume you could talk about alternator output amps, lithium and agm , charging rates and so forth. smart altrernators is a thing now with modern cars.

[@myronmoncur]

i have 2 24 V DC lead acid batteries is that enough for my 3000W inverter ?

[@cleversolarpower]

Most likely not. If the 24v batteries are 100ah each, then you should draw maximum 40amps. 40Ax24V=960W.

[@myronmoncur]

so maybe go down to a 2500W inverter?@@cleversolarpower

[@myronmoncur]

watching your video and doing some math (hopefully correctly lol) a 2000W inverter with my 2 24V Battery 100AH should be fine (1920 W) . Is this correct ?

[@robertweekley5926]

A "100 Ah" Lead Acid Flooded Deep Cycle Battery (Trojan SCS Series) is "Rated" at 20 Hours, meaning a "5 Amp Load" (20 Hours x 5A = 100 Ah)

[@robertweekley5926]

To get a Durable Setup, if you need to pull 100 Amps just divide 100 by 5 to get your battery count! (100/5=20) So that means 20 in Parallel *For a 12V Inverter*, or 4 in Series x 5 in Parallel if you use a 48V inverter. So 2 in Series x 10 in Parallel, for a 24V Inverter!

[@cabracove]

Ok, first off, a 1000 watts is pretty useless. Get an inverter that will at least run a coffee maker.

[@cleversolarpower]

That's so American of you to say 😄 vans use less than 1000 watts.

[@cabracove]

@@cleversolarpower 2000 watt inverter and 460AH of batteries in my van. My coffee maker pulls 1200 watts.

[@adriaankoffiekar6442]

My Coffee machine pulls 2500 watt and the inverter is 3kVa 48V - 16 lfp04 280ah Est. On time 25% VICTRON Multplus 2 GX 50mm2 automotive double shielded cables 2mtr x 2 I can hardly wait for the sodium cells to become reasonably affordable, especially considering their cold qualities.

[@davef.2329]

No trying to start any arguments with anyone, just convey some useful, practical info: Mr. Coffee Mini (5 cup model) draws 635 W when on the brew cycle, then becomes intermittent, as needed with the warming plate on. That 1/2-size machine, with a 1000 W CSWEI PSW inverter, 10 Ah MPPT charge controller, 100 Ah LiFePo4 (100 Ah BMS) and 150 W of solar panels has worked successfully without any other a/c input for the past year. We make a pot in the morning, another in the evening, and sometimes another in the mid-day. It's doable.

[@cabracove]

@@davef.2329 Hey whatever works. I'm already running the fridge, I like to turn the diesel heater on in the morning, and maybe nuke a pastry with some butter to have with my coffee.. 1000 just won't cut it. Some of that stuff is 12V, but still....

[@anjelinacao6565]

I have a 2000w continuous/ 4000surge power inverter and I am not sure what battery I need and if I need two of them . Please help ?! 🫠

[@anjelinacao6565]

I’m trying to power this portable air conditioner 900w 8,000BTU

[@cleversolarpower]

It's best to use a 48V system for home applications. 12 or 24V for mobile. Don't rely on the surge protection of the inverter, this will probably not be correct. 900W/12V=75A*1.25=93A. At least a 100Ah battery.

[@hotshotter4500]

​@@cleversolarpowerf I buy a 2000 inverter and a 200ah lithium battery how long should I expect it to run a refrigerator that draws 500w?

[@vcarvewood4545]

​@@hotshotter4500your fridge consumes 500W/12V=42A. What kind of monster fridge it is, but anyway. 200Ah/42A=5 hours. But remember that fridge works in cycles. You can multiply that time by 3, I think.