After pawing through battery specs for what seems like the millionth time, I’m back to the A123 cells, of course. Both the cylindrical cells I’ve played with and the prismatic (pouch) cells are close enough to each other’s specs to run the numbers, but this is based on the 20ah prismatics: AMP201HD-A.
I’ve dropped the voltage down to 380 to fit within the controller’s high limit, and raised the kW target to 139, to get it up to a 7.5kWh pack, just for range sake. Also a corrected battery spreadsheet here: pack-config
The important number to get at is the kW/kg, for me. Fiddle with the numbers, (or use a battery spec comparison sheet) and find the highest kW/kg, and you’re going to find the best bang for your buck, power to weight-wise.