When we use Solar system we always want to connect our pumps directly to the solar panel, we do not want to use a battery. But the solar system usually is not very stable because of the unstable light condition. So if we use a weak solar panel, although the pump can work, it can not work at the best situation. If we use a very strong solar panel, the pump will be easy to be burned. Then the DC-DC Step-down Power Module could help us, it can reduce the high DC voltage to low DC voltage as we want. Usually the solar panel has 70% conversion rate, so we suggest you choose a larger solar panel and use a DC-DC step-down Power Module.
Post time: Jan-24-2017