LiFePo4 battery build

[100 Proof]

I built this battery from bare 3.2V cells and other assorted bits. Here are some features:

1- 460Ah/6,000Wh. All useable, but as a practical matter about 80% useable.

2- Weighs about 85 pounds.

3- Can safely charge and discharge at a 460A rate. That means I can run my microwave, toaster, art project, etc.

4- Probably last for 15 to 20 years.

5- I'm in it about $1,100 US.

Coming soon to a burn near you, or some hippie...

Love to see other LiFePo4 builds!

[ygmir]

very nice!

[burner von braun]

Thanks for sharing, 100 Proof. It's always inspiring to see what other burners are building!

[some seeing eye]

Great job!

The FB group DIY Powerwalls is a great resource for these builds.

There was a BRC camp that open sourced their battery, inverter, and charge controller in a tub, with connections to solar panels, it is not coming to hand easily at the moment.

[burner von braun]

AEZ perhaps?

[some seeing eye]

Found it: https://github.com/hotelcaliforniabm/arc

[prussianblue]

Hi,

I also build batteries. Not as big as yours. My most recent is just a 100 Ah LiFeP04. 60 amp bms. It really is fun and used to be far cheaper than buying a 12 volt LFP. However prices have come way down. I went to Renegade and powered my camp and ebikes from a Chins LFP. Worked great.

Radio

[100 Proof]

Hi,

I also build batteries. Not as big as yours. My most recent is just a 100 Ah LiFeP04. 60 amp bms. It really is fun and used to be far cheaper than buying a 12 volt LFP. However prices have come way down. I went to Renegade and powered my camp and ebikes from a Chins LFP. Worked great.

Radio

Post some pix please!

[darkfred62]

I used Will Prowse information to build my setup

https://diysolarforum.com/members/will-prowse.1/

[100 Proof]

Post some pix please!

[100 Proof]

I used Will Prowse information to build my setup

https://diysolarforum.com/members/will-prowse.1/

Post some pix please!

[FlyingMonkey]

Looks pretty nice. Are you going to use solar to charge it or will that meet all your power needs without?

I've been using 2 x 100W panels & 2 very heavy deep cycle batteries for the last few years but I am upgrading to lithium this year. I typically have more power than I need with that but my needs are modest.

[motskyroonmatick]

Right on! Battery builds are fun. I've got a 25 AH battery I put together that I am running an experiment with... Seeing if it will power some LED lights reliably off of some small solar panels. The experiment is working out and I will probably end up powering all the signage and street lights with similar systems.

[Drizzt321]

That's a really big battery!

What BMS did you find that can handle that?

And is that a Class-T fuse I see there? Good on ya!

[100 Proof]

Looks pretty nice. Are you going to use solar to charge it or will that meet all your power needs without?

I have 750W of solar panels on the roof. I have used this setup to run a 5K BTU window air conditioner for 6 hours/day on playa without the new battery. I also setup a charging station to gift power to others.

[100 Proof]

That's a really big battery!

What BMS did you find that can handle that?

And is that a Class-T fuse I see there? Good on ya!

That is indeed a Class-T fuse. I have a 100A BMS, but I bypass it for the inverter and use a SCR tied to the BMS on one end and the inverter remote switch on the other end to still allow the BMS to gracefully shutdown the inverter if my bank gets too low.