This will be my 3rd build of a lithium battery for solar but my first LifePO4 build. My first build was a 23kwh NMC build using 30ah batteries salvaged from an EV. The second was a “power wall” style using 140 21700 cells from a model 3. It powers my gate for my house and works great! I’ll show it off at some point.

For this build I am using 64 of the EVE280k cells. I have not decided exactly on the configuration yet… 4 separate banks, 2 banks made in a 2p, or 1 bank with them 4p???

Originally I had wanted to put them in a server rack I have cut down to a 27u size but I just don’t like how it looks and buying a new rack would cost too much at $900. I then thought of putting them in a harbor freight tool chest $370 but I’m not sure it would hold up well to this much weight!!! So I ended up buying a shelf from Sam’s club to put them on… it was cheap enough at $75!!


Ordered 4x JK BMS’s 150a… still not 100% on how I will configure them… keep leaning to a 16s4p configuration vs a 4 x 16s….

My take on cell compression…. A little foam, 1/2 acrylic, and a couple tie straps…


Progress has been slow…. I have been waiting on my BMS’s to show up… they finally have! 1 went with JKBMS in 1a20s15p (150 amp) x 4… added 125 amp breakers… the cross over busbars are 4gauge x 2… should be fine but will check with thermal once everything is up and running.