ECO-WORTHY 1200W Grid Tie Inverter MPPT Function Waterproof MC4 Connector 22-50V to 110V Directly connected to the solar panels (do not need to connect the battery) High-precision analysing the AC phase angle .The phase shift rate is less than 1%, thus achieve high-precision with phase modulation AC output together. Pure Sine Wave Output---Use SPWM directly to make pure sine wave output. constant current and output power, without any overload, over-current phenomenon. High-precision (MPPT) operation power, automatic and immediate adjust the solar panels output power at the maximum output point,made the inverter discharge to power grid with the highest efficiency.