20KWh DIY RackMount Backup Battery for Half price

DIY!!

Fully DIY way – https://www.pcbway.com/project/shareproject/3_6KWh_Scooter_Rack_mount_Battery_Kit_e42c8e40.html

Or PreAssembled DIY kit – https://jag35.com/products/3-6kwh-rack-mount-scooter-pack

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10 COMMENTS

Rob Vermeulen

Wonderful project! Too bad it is difficult for EU people to start on it, as shipping your batteries to here will make the whole project not as cost-effective anymore (and some of the parts will also be unavailable from the websites you selected). But it is very inspiring to see how it can work.

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ANT & TEC

Do the boxes require any cooling with the packs being tight together inside? Do the packs generate much heat?

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Alfonso Estrada

Hell ya jehu always coming thru with the best diy content …NMC is still a great chemistry🙌🏽🙌🏽🐐🐐🔋🔋👑

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CJ De Beer

Hihi. Great video as always. Do you have or can you make a video with LTO cells? We have rotational power cuts about 5 to 8 times a day, so the long cycle life is the only viable option for most bang for the buck. It’s hard to find DIY information like your videos anywhere else with proper links too. 48v LTO build would be amazing.

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Martin Mooren

For half the price you have to diy a battery with a difficult to use 36V, with around 1000 instead of 6000 cycle life (cut from the video) and without any warranty.
That doesn’t seem very attractive to me.
Nevertheless I really like your inspiring ideas and creativity on these kinds of projects and builds!

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grindychum

Very cool. Unfortuantly I have already bought my scooter batterys awhile ago when we would clip off the white connector and replace with a xt30 to wake up the bms.

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Real Sense

That’s pretty sweet, you just keep making it easier. I already did a 3kh build with the R5 batteries for my office which I made a video for. My next build will be with LiFePO4, cant wait for those to become more affordable too.

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Robin Graham

I would love to make one of these and shoot for around 40kwh. Do you have info on how to connect multiple boxes together? Do you have info on how to connect this to an inverter and connect it to your home? What inverters do you recommend? How safe are these batteries after you remove the fan? Could you just move the fan to the outside of the case?

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Bu Jin

Yes, LFP has insane cyclelife, but honestly, as far as home backup goes, that the least interesting reason LFP is better. What I find to be far more compelling is LFP’s safety profile. It’s basically impossible to get LFP into a thermal runaway condition, where you have one of those nasty lithium battery fires to contend with. Granted, it’s not very likely you’d have to deal with that with an NCM chemistry battery, but **IF** you did, 20kWh is a LOT NCM to get away from you inside your home! Otherwise, love the project.

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