ScottG wrote:
This is very helpful Don, thanks for posting. I have been trying to decide whether to buy bats with built in BMS' or buy 4 cells and an external BMS. I have only seen a couple of assembled batterys that can be easily opened and they are much more expensive and have no other attributes - you're just paying for the case.
I think this makes the decision for me.
Another benefit of stand alone BMS' is they tend to more often have better temperature protection and blue tooth. I can also over-size the BMS to head off trouble.
That is where I ended up to, I have put together four 12 volt 280ah batteries, I am using two for a 3000 watt inverter on my work truck each has a 250amp BMS. I think I have about $1100.00 into each battery.
Battery bank
