We just had our pool completed, and get the luxury of watching it until next year because I'm not a polar bear. The kids did get to swim in it a day or two right before one of the earliest cold fronts in South Texas blew in. I wanted to post some results I've seen with the Hayward Variable speed units. When I ran electric for the pool equipment, I wired in a 100 amp meter service behind my primary residential meter so I could tell exactly what this pool is costing me. (bad idea to know that now)
We have a 1.85 hp Hayward TriStar variable speed on our pool and a 1.25 hp single speed on our water features. We kicked it on for the first time on November 11th full speed. On November 14th I cleaned the filters and on November 15th, I changed the run times for 4-5 hours on high speed and the remainder of the day on low speed.
Top-left graph shows the pool pump demand for full speed. If it ran non-stop that would be 1.57 x 24 hr = 37.68 kwh/day. The top-right graph shows the pool pump demand running at 50% which running non-stop would be .23 x 24 hr = 5.52 kwh/day.
The middle-left graph shows the pool pump and water feature pump kicking on yesterday morning due to the freeze protection. At approximately 5 am it kicked on and then again around 6:45 am. Combined kw for both the pool at full speed and water feature pump is 2.94 kw. The middle-right graph is the pool pump running non-stop until I changed the settings to 50% for a majority of the day. The bottom-left graph shows the KWH/day usage for the pool pump running non-stop until November 14th where I cleaned the filters and on November 15th where I changed the schedule.
Granted the water flow is relatively low on 50%, you can see the energy savings if you can still turn the water over. I plan to play around with the different % on high speed to see what the demand looks like on those as well. I may never run it on high speed if I can get the turn over and have savings on the electric meter.
Hope this is beneficial to others. Now to figuring out this water chemistry and I'll be happy.