FishinRod thanks. Maybe it was where I bought the pump, the manual that came with the pump was hard to read! It is a surface pump kind of a dc version of a gas trash pump. It has a BLDC 48 v motor and controller. specs are.60-90voc. 660watt -1060watt panels. Max head24m. It states: "The solar water pump controller drives the high efficient brush-less DC pump motor, utilizing the latest MPPT technology to ensure maximum flow is delivered under all light conditions" I have 800 watts of panels. The readout on the controller is 82v. I don't know, it pumps good until I hook the 120' of pipe to it. (20' actual head). I going to install a watt meter to make sure all the numbers are right.
