On the two recent mornings where the outside temp hit 35, our pool water was 76-78 with the pool cover, prior to the solar kicking in, which usually happens about 9AM on a sunny day.
All 6 of our panels face south, Jack's installed, and his guarantee was 80 degree water from Feb 15 to Dec 1, if we use the pool cover.
If we want warmer water in the Dec-Feb time frame, we can put on the heater (electric), but it wont have to work as hard to bring the temp up as the solar is doing most of the work on sunny days.
But then, we dont need to get in the water when the outside temp is below 70...
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