Solar Grid Tie Inverter - SODIAL(R) 300W Solar Grid Tie Inverter with LED Display (10.8-28V DC, 90-140V AC, 88-95% efficiency) Pure Sine Wave Output, fed the power to city net. No battery for solar system anymore, really enviroment friendly. Wide range input voltage 10.8-28V 300W. Over Current protection, reverse polarity protection, max power point tracking function. LED display, 88-95% efficiency. Output current total harmonic distortion: THDIAC &lt;5% Output short circuit protection: Current-limiting Please be noted: this solar grid tie inverter only work with solar panel, can not work with wind generator. Can not work as off grid inverter. Electromagnetic Compatibility: EN50081.part1 EN50082.part1. Power System Disturbance: EN61000-3-2 EN60950-1. Network test: DIN VDE 1026