Attention: Inductive loads need about 3-10 times of rated power to start, e.g. refrigerator, coffee machine, vacuum cleaner. Double check your inverter is sufficient power to start these loads. If the inverter surge power is not enough to start the load, you need to buy a higher power model. Simply it is to say that: Not a 1500W rated power inverter can start all appliances lower than 1500W. Always keep you are having sufficient DC power supply if you are using higher power output.(bigger size battery or keep your car engine is ON while running high power loads) Pure Sine Wave Inverter 1500W with dual Sockets►Continuous Power: 1500W►Max Power: 1700W►Suge power: 3000W►Output waveform: Pure Sine Wave►THD: ≤4%►Efficiency(Full load): 85%►Input voltage: DC12V (10-15V)►No load current draw: