Solar Controller Setting - Temp Differential


Active member
May 18, 2015
Cape Coral, Florida
What is everyone setting their solar controller temperature differentials at?

I'm trying to figure out a good setting that provides efficient heating with minimal valve cycling. The temp differential that I am referring to is the difference between the panel temp which is basically air temp at the panel compared to the water temp of the pool.

I currently have my start temp differential set at 6 degrees and the stop differential set to 2 degrees.


Mod Squad
TFP Expert
Platinum Supporter
LifeTime Supporter
Aug 10, 2012
No, it hasn't been an issue. It's been set like that for 4 years or so. We tend to either be hot or cold. I could see that it might be a little worse for you with more rainy or cloudy weather.