Characters: 1. Second generation of mppt function: automatic /don¡¡¥t need set mppt voltage by lcd/led. Efficiency max 30% higher than the inverter who need to setting the mppt voltage, more Output flow. 2. Fully automatic operation, non parameters to setting. 3. One key for startup/ stop: knob switcher support adjusting the output flow 4. Minimum dc input (pv output )voltage: 50~90v 5. Protection: high temperature, over voltage, over current, over load, input anti reverse, Short circuit, phase lost , dry water pumping, against lighting. 6. Automatic pv / ac / diesel switcher 7. Lcd/led display 8. Well and tank's water level detecting, optional of pressure sensor. 9. Gprs sms control on/off 10. Ip64 waterproof 11. Non battery