I wanted to figure out how much money I would save monthly if I were to switch to a 2 speed pump. This calc is done under full load so it may be a bit off but should give a good estimate.

formula:A x V x hrs (per day pump is run) x 30 (# of days in a month) / 1000 to get kWH x price per kWH.

Anyway to spare the numbers I calculated my current 1HP Sta-Rite at $50.67 for every 30 days of use running 12hrs per day at .06 cents/kWH.

Swapping to a Pentair Whisperflo 2 speed pump running at low speed for 12hrs using the same numbers as above costs $11.67 every 30 days.

Quite a savings assuming my calc's are correct. If it is correct the pump pays for itself in 10 months. Not a bad investment IMO.

Joe