My profile is very similar to mas985. I can get about 4 to 6 degrees a day (my panels - unfortunately - face east/slightly north, so they are not ideally positioned, that is why I added the extra panel set). But, here in the NE, I easily lose 4 a night without the cover and still lose 2 with it on. And I don't run my pump at night so the water doesn't get stirred up.
Last year, we were over 86 almost all season, into the low 90s sometimes (the boys don't like it that warm, the girl wants it as warm as possible). My biggest problem with heat is RAIN. A good day of rain can drive the temp down 10 or so degrees even with the cover on (screws up my pool chemistry too). But, as soon as the rain stops and the sun pops out, the solar kicks back on!
Overall, I love it. My system cost was pretty high because I paid for it in 2 parts, maybe 6 grand total (and I have a 120' run to the roof - thats about 1,000 just in piping!). But, we don't have gas here, propane is way too expensive and a good heat pump around here will go about 3 to 4 grand plus about 500/year operating. Last year we opened in early May, closed in late October, NOBODY else around us did that, so it has been worth it.
Bookmarks