IMAGE&reg; 300w Watt Solar Grid Tie Power Inverter Converter,High-frequency grid inverter (Input 10.5- 28V,Output 90-140V&pound;&copy; Pure Sine Wave Output,Fed the power to city net,No battery for solar systme anymore, really enviroment friendly Wide range input voltage 10.5-28V 300W Over Current protection,Reverse polarity protection Max power point tracking function 88-95% efficiency, LED display