So i tested the pump again with my watt meter and its pulling about 640 watts with the nozzle i have on it now. After a short test of about 5 hours i used about 3kwh, and at my electric rates thats about 50c which is less than i remember from my last test. Extrapolated out to a modest daily schedule its closer to around $20 a month, not the $40 im remembering.

This nozzle is a much higher flow than the one i used testing last time though so this weekend im going to swap back and see if the wattage goes up with a more restricted nozzle, im hoping it does. If so im going to experiment with some sort of deflector plate to achieve different patterns rather than a restricted nozzle cap.