Just reviewed my electric bill over the last month. Our bill in September was exactly the same as our August payment, but this needs to be adjusted for the higher rate that kicked in for September and the exceptionally hot first part of the month. Given the first 2 weeks of September was essentially the 2 hottest week in the last 3 years, I ended up taking daily average electric use during weeks with no AC use before and after the installation of the variable speed pump.
Average kwh before the install was 23.7 kwh/day. Average kwh after the install was 19.7 kwh/day.
At 0.38 (new tier 4 rate) x 4 kwh x 30 = $45.6 per month saving.
After a month we just got the $200 rebate. So the pump after rebate was $600, translating to 13 month for the return on investment.
This is lower than previous projection on the ROI primarily due to the need to keep the pump at 2800 rpm one hour per day to keep the pool cleaner running and to keep the pool temp even and warm (at lower setting the water temp just under the pool cover is very warm while water at the deep end remained cold).
Still quite a worthwhile investment with the self install. ROI would be at 2 years if hiring an installer.
