Lithium batteries

S Davis wrote:

StirCrazy wrote:

S Davis wrote:
“I could just take the two 4s BMS off and use a 100amp 8s BMS that turns all 8 cells into one battery instead of two in parrelell.”

Except you just made a 24 volt battery with a 8-S BMS. Eight cells in series makes 25.6 volts. To stay at 12 volts and up the ah you would have to use a 4-S BMS and use parallel sets of cells. The draw back is not being able to monitor each cell in the battery.

true, you would be monitering groups of cells, but if you get quality cells that are matched, thats not an issue.

I still recomend building seperat batteries unless you want to go to a higher capacity and use a stepdown. but in my case I would do another 310AH battery and have two of them. so when I am using my camper I would just use one as thats 10 days camping with the furnace running 24/7, but for my 5th wheel I could have two in there and just move one back and forth between the 5th and the camper. one will give me more usable capacity than I have with my four 6V batteries so it will be fine when I am using the camper, but when I am going for a longer dry camping backwoods with the 5th wheel I can put the second in and double my capacity. being only 48lbs its not a big deal either.

That is what I did, I have almost 2000ah in seven 12 volt 280ah batteries. I have two in my work truck with a few spares.