The ultimate on-the-go power solution! With 3600Wh-21600Wh expandable capacity, 4000W AC output, 15ms UPS, 10-year lithium iron phosphate battery life, and a convenient pull-handle design, you'll never run out of power again.3600Wh Capacity4000W AC Pure Sine Wave Output (6,000W Surge)LiFePO4 Battery for Over 3,500 Cycles to 80%Expand the Capacity from 3600Wh to 21600WhFast Charging: From 0-100% in 1 HourUnique Voice Control, Smart Wifi, and Bluetooth ConnectionSupport Touch Screen OperationUPS Battery Backup under 15msSolar Input: 12V-150V, 40A, 2000W Max MPPTEco-Friendly/Gas Free/Quiet/Cost-Effective