Here in South Florida, batch solar water heaters work well enough. Put a tank inside a box with a glass cover. The sun heats it to 130F during the day. If covered at night, it stays hot.
I plan to use this to feed my normal water heater. That way, on sunny days, I use very little propane to heat water.
I cannot find a good tank. I have been looking for weeks for a cheap tank to use. I need something large, like 60 gallons. But, at this point, I would consider nearly anything. My propane bills are nearing $200 per month, just for hot water!
Can someone suggest a good source for a tank that will work?
Chris