The Luminous iCruze 4000VA, 48V inverter offers a max load of 2850W and a charging current of 21A. When purchasing this unit, 4 x 12V Inverlast Tall Tubular batteries, either 150Ah, 200Ah or 220Ah are required for operation. All four batteries must have the same Ah rating and be connected in series. This is not a DIY unit as it has to be connected to your Grid.