Here are the 5 Prius packs in my truck. They are wired in parallel. The pack impedance is so low that the rear tires can break loose during heavy regen. Each pack was good for about 1.0kwh. So the pack was good for about 5kwh’s total. Nominal pack voltage was 273 volts. The charger’s software was tweaked to account for this. The dolphin charged the packs fine.