I can't really comment except that when I asked our installers about it they had the perception that solar water heating was "an 80's and 90's thing". I don't k

I can't really comment except that when I asked our installers about it they had the perception that solar water heating was "an 80's and 90's thing". I don't know much about it beyond that. I guess you could look up the insolation values and do the math on how much water you use and how hot it needs to be.