Nobodybusiness
Collecting the leftovers of the Great Sky Reactor.
16 x 3.2v 280ah cells is 15KWH. 16Cells @$125 Delivered plus $200 for BMS is $2200.How about some minutia, here. The ones you build, the details and layout, and exactly which commercially built units you've tested your builds against, how you've tested them, and how you can assess longitudinal performance between yours and "X" brand?
EG4 battery is 5KHW and cost $1500.00 100%DOD is 5KWH.
To equal Mine would have to be 3 EG4s @$1500 = $4500
Its a no brainer.
Yes I get full 15KWh if I want. I only use 70% of it or about 10KWH to keep the stress down.
Plus the cells in the Commercially built systems are laser welded.
If you have a bad cell good luck replacing it.
DIY you pull 2 nuts and replace the cell.
if i get anywhere near 3000 cycles that is 10 years.
Its not Rocket science.