yabert
Solar Addict
You don't have to use 8 K9 unit.Despite the thin documentation the software looks great. I would need eight K9 units = 1,400 USD plus the Core @ 254. Total 1700 bucks
A single one will work if you connect your cells in parallel.
In fact, four 100Ah cells in parallel will simply become a single 400Ah cell. OEM do this inside EV batteries
In a boat, it can be a good idea to have two batteries, but clearly not an obligation.
If I had 54 100Ah cells, I would probably build a giant 1300Ah 4S battery with a single BMS and use the $$ saved on BMS to buy a regular 12V LFP battery or two.