So I am visiting Florida. It is hot and Humid. My first question, do people even have heaters in there homes? I am sure they have electric resistive heaters. I would think they get used very seldom. The next question I had, why doesn’t everyone have a solar hot water heater. Just running the water thru the collector without any sun would at least get it up to ambient temperature. Which right now is 91 degrees. The next question is, why doesn’t everyone have solar modules on their roof? With the great solar insolation that Florida receives it would seem to be an easy option. It is easier to cool down from 90, then it is to heat from 20. Since it seems to rain almost every day, a rain barrel would have you covered on the days that you get missed by mother nature.