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Battery rated capacity is 16 kwh at 388 v max if you are using the factory bms. 18kwh if you go to 4.15 v per cell.

Useable is: starting voltage x starting amp hours minus stopping voltage x amp hours.

On my pack, it is 196v x 90 ah minus 120v x 90 ah or about 7 kwh. Factory discharges lower than I do.

No bms, been doing this for 6 years so far. 26 mile total commute up & down hills series wound no regen 88 ford ranger.
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