Been very hectic around my house lately: Two weeks of vacation, then I got my knee mangled and spent the last week on crutches and hydrocodone. I've been caring for the pool by sending the kids out to take water water samples and then I test on the couch and tell them what to do.
During this last few days, we've experienced unseasonably cool weather. I turned the solar off and put the solar cover on Friday night because of the cool forecast. Saturday it didn't make 70 and was cloudy, and it was down in the mid-40s Saturday night. Sunday was cloudy and mid to upper-70s. Finally sunny and mid-80s today and I turned the solar back on this morning.
I'm getting around now and I stuck my hand in the water to test tonight, and I could feel the warmth before I touched the water. 92 degrees. I told the kids yesterday it was probably too cold to swim.
That's the biggest benefit I get from my solar. An otherwise un-swimmable week avoided.