solar water heater

HiTech wrote:
The solar powered pump is an elegant solution for solar water heat since it is only pumping when there is enough sun to heat water.

It is simple and it is not going to work. I'm Ok using 80F water, and so are many other people. And it can get that warm under cloudy skies in summer. But if the pump won't work, then I can't use this water.

The whole idea is only a partial solution. No hot water in the morning when you need it the most. Not much hot water in the evening if you are wintering down South, when it's dark and cool after 6 pm but you still need some hot water for kitchen and washroom on that day.

And again, these 6 gallons on the roof... You can't leave it there, you have to drain it every time when you move. 50 pounds of water sloshing back and forth when you drive - no, thanks.

Also, how big is this thing? Like a 100W solar panel, 200W? For eco-minded folks there is barely enough roof real estate for solar panels. Paper plates or not, but propane heater really looks better than this thing.
In a shore cabin this heater makes some sense, yes.