I have been looking at a lot of posts trying to understand how to quantify the electric savings of replacing my one speed motor with a two speed motor. (Retain Existing Pump) Below should be all the data required to calculate the savings but I just don't have the understanding of my electrical costs to figure it out. I'm sure it's a quick calculation for someone who understands all this stuff so any input would be helpful related to the savings or my plan to change the motor.
Pool is in Michigan so it's closed in the winter months
I have a electric Cover
Pool Installed in 2004 (20x40 Hopper pool with spill over spa)
Hayward SPX2610X15 (1.5 HP Single Speed Pump) 56J Frame (Replaced Motor in 2007 and again in 2009)
Jandy Aqualink System with Aquapure
I run the pump about 9 Hours a day
Detail of my last bill that was $119.77
Power Supply Charges:
Power Supply Energy 493 KWH @ 0.06912 34.08
262 KWH @ 0.08257 21.63
Renewable Energy Plan Surchg 3.00
Other Power Supply Surcharges* 5.66
Service Charge 6.00
Distribution 755 KWH @ 0.05003 37.77
Energy Optimization 755 KWH @ 0.002664 2.01
Other Delivery Surcharges** 5.01
Residential Michigan Sales Tax 4.61
Total Detroit Edison Current Charges 119.77
Service Period Mar 15, 2012 - Apr 13, 2012
Days Billed 29
Meter Number 5447257 09
Meter Reading 17363 Actual - 18118 Actual
KWH Used 755
or around MAY 14, 2012
Questions I am trying to answer:
1. What two speed motor should I replace with ? Do they make energy efficient and non-energy efficiant two speed motors like the single speed motors? Any specific recommendations ?
2. If I change to a two speed motor how much would my monthly electric bill go down ?
3. I have extra relays in my Aqualink so can I wire the two speed motor to it and use the remote to automatically change speeds when I enter functions like "Spa Mode" ?