It can be powered by battery series voltage 320-420V (note: when the input voltage is optimal, the power can reach the maximum. The lower the voltage, the less power). There is no need to connect a separate voltage auxiliary power supply to power it. Its driver board is a dedicated IGBT driver board, powered by multiple-way power supply. It is designed with negative voltage shutdown. Negative voltage shutdown can make IGBT really complete shutdown, more effective protection of IGBT due to malfunction, greater driving capacity and higher efficiency! The driver board boasts over-current, short-circuit, low-voltage and over-temperature protection. It also has an intelligent temperature control auxiliary fan socket [fan current up to 12V 0.3A]. When loaded with high power, it requires a larger fan to dissipate heat and an additional power supply to power the fan. It is a high-power sine wave inverter board. It can be used for solar inverter conversion, modified sine wave inverter to sine wave inverter, high-frequency square wave inverter pre-stage to sine wave inverter, new vehicles and RV charging piles, charging and power extraction. The 8000W board adopts a dedicated IGBT driver board using 12pcs high-power to-3PL IGBT., Weight: 3.68392439802 Pounds, Manufacturer: Fpreeza