[Jims5543]

I was careful to point out my solar panels are used for a Florida pool. Even with daytime highs in the 55-60 range I can still maintain 90°+ in my pool. The key is to keep the bubble wrap on and only take it off when using the pool. This applies to any heating in colder months. It keeps the heat in.

Before I put a controler on my solar panels, I forgot to turn them off and we did not go in the pool for a few days. This was in the spring when temps are in the low to mid 80's. The pool was 100°. Oops!!