... battery 4.DC/AC inverter 5.High-efficient as 98%. 3.7kw Solar Pump Controller1.solar pumping system consists of ... point tracking(MPPT) and maximize the use of solar energy.3.Product feature:1. Water pump is driven by three-phase ... wave PWM control ,with fast response speed, good stability; 3. Full automatic operation, according to the actual conditions,it can freely set ...