The models do more than change the AC nameplate rating. Maximum PV input increases from 24kW to 25.6kW and 28.8kW, while peak output rises from 30kW to 32kW and 36kW. The largest model also reaches the highest battery-current capability. A HESP 15-18kW three phase hybrid inverter should therefore be chosen by the combination of phase demand, PV field size and battery-current requirement instead of selecting the highest wattage by default.