Wire your pump direct to your battery with a toggle switch and a 15 amp fuse in the positive feed.
Control the flow with a tap at the end of your pole hose.
Adjust the pressure cut off on the pump (little allen screw in pressure switch cap) so that the pump doesn't cycle when you restrict the flow.
Works perfectly
Why use expensive unreliable and unnecessary electronic gizmos? We were all doing it like this before Williamsons produced the controllers