... efficency 3.7KW solar pump controller 2.LCD display 3.no need battery 4.DC/AC inverter 5.High-efficient as 98 ... point tracking(MPPT) and optimizes pure sine wave PWM control ,with fast response speed, good stability; 3. Full automatic operation, according ... pump speed ; 4. The main circuit uses digital power module,with high reliability, high conversion efficiency of 98%; 5. Have complete ...