Quote:
Originally Posted by Tytorres
They want to use just one BMS for the 8 cells inside the custom metal case. Since I bought that big inverter they actually want to change to a higher-charge BMS, but it is not a JK and doesn't have a Bluetooth feature, which was important to me. It's actually the reason I went with Eel to begin with. Not sure now if I want to proceed.
Thoughts?
|
Insist on dual JK2A8S20P-H units (or one each 'JK2A8S20P-H' and 'JK2A8S20P', without the heater interface and about $4 less costly.) For your big Inverter, you need more than 200A continuous power:
200A * 12.9 Volts = just 2580 input VA. With power lost converting to 120-VAC in the Inverter, that's probably not more than 2200 watts at the 120-VAC outlets. You should be able to provide
double that into your Inverter, with higher peaks.
SO, in the same box or not, you have two separate battery packs (with separate BMS on each 4-cell pack, separate 350A "Class-T" fast acting fuses). That allows a bit less than 700A total extremely short periods, or a bit less than 400A continuous (total). Why downgrade into cheaper BMS units with pathetically weak balancing current, no cellphone App, and the same current maximums? Even with two of them, it makes no sense.