4000W,3600Wh Capacity; 3600W/4000W AC Pure Sine Wave Output (6,000W Surge); LiFePO4 battery for over 3,500 life cycles to 80%; Expand the capacity from 3600Wh to 21600Wh with 5pcs R4000; Fast Charging:From 0-100% in 1Hours(EV charging+Solar input/Wall charger); Unique Voice Control, Smart Wifi and Bluetooth Control Function; Support touch screen operation; UPS Battery Backup; Solar Input:12V-150V,40A,2000W Max MPPT; Eco-friendly/Gas free/Quiet/Cost-effective.