In photovoltaic off-grid system, the power of off-grid inverter is generally determined according to the load type and power of the user.

According to the impedance property, the load can be classified into resistive load, inductive load and capacitive load. #pure sine wave solar power inverter Resistive load: the load without phase difference between current and voltage is resistive load, such as rice cooker, light bulb, electric furnace, electric soldering iron, etc. Inductive load: #power inverter dc 12v to ac 220v The load with a phase difference of current lag voltage is inductive load, such as washing machine, air conditioner, refrigerator, water pump, range hood and other loads with motors and transformers, relays, compressors, etc. Capacitive load: #5kva inverter current lead voltage a phase difference negative load for capacitive load, such as compensation capacitor, computer, TV and other home used switching power supply. The starting power of the inductive load of the motor is 5-7 times the rated power. When calculating the power of the inverter, the starting power of these loads should be taken into account.