High-frequency 500W Solar Grid-tie Micro Power Inverter Converter (Input 10.5 - 28V DC, Output 90-140V AC) Pure Sine Wave Output,Fed the power to city net,No battery for solar systme anymore, really enviroment friendly 88-95% efficiency, LED display Max power point tracking function Wide range input voltage 10.5-28V 500W Over Current protection,Reverse polarity protection