We are offering psd600 dc solar pump.Featureshigh efficient dc brushless motor. Rich and comprehensive benefits.optional centrifugal pump for big flow and helical rotor pump for high lift.high efficient semiconductor device used in main circuit. High reliability. Up to 98% conversion efficiency of inverter.dynamic vi maximum power point tracking (mppt) algorithm. Fast response and good stability. 99% mppt efficiency.full automatic operation. Complete protection functions. Integrated with water level monitor to prevent overflow and dry running.full aluminum alloy case. Ip52 protection grade. Ambient temperature: -20+60.