1.permanent magnet DC brushless synchronous motor : effeciency improved by 15% to 20%
2.brass or stainless steel outlet /connector /oil cylinder
3.japanese NSK bearing:prolong the working lifespan
4.alloy mechanical seal:longer working life and High reliability
5. Intelligent water shortage protection
6.water proof grade IP 65
7.MPPT function Solar utilization rate is High