Back in Oct 2012 I wrote an article about the problems a friend of mine was having with his solar shower. At that time we asked for some suggestion to fix his problem and received some very good ones. This morning we received another post on solar showers by a gentleman who has lived off the grid for 12 years. He gives a good fairly detailed description of how he solved the problem. I have decided to put his comment up as a post
I’m lucky, the cabins is a 1/4 mile off road up the side of the mountain and my system is all gravity fed from an artisan 80 yards up the mountain behind the cabin. Off grid 12 yrs, tired many different options. The barrel, insulated enclosures, etc., but this is where I am. I have coiled up maybe 200. could be 300 feet of 3/4 inch black well pipe into 4 separate coils. They lay connected to each other, gravity fed from the spring, in series on the black flat roof. That’s enough to get a quick but decent shower on any summer day in the NE.
The well pipe heats the water up very quickly and by 10 or 11, you should be ready to go. A step further is the aluminum 15 gallon tank, which I put into a plywood enclosure (also on the roof) with a glass facing the south side and top and rigid aluminum foil covered insulation boards tacked to the inside of the other 3 sides of the enclosure. The enclosure is tight fitting to the aluminum tank and there holes in the plywood to supply the tank and drain the tank into my eaves mounted showerhead at the rear of the cabin.
I built a wood platform to stand on (with a plywood privacy screen on one side, just in case someone pulls up the driveway too far) mounted a soap dish, back brush hook and towel rack as well.
Plastic barrels are no good for heat transfer, even if you paint them black, so your tank is best if it’s made of a thin gauge aluminum. I got the tank and rigged it with a fill port on top and the drain port on the bottom which is attached to the shower feed hose.
Sometimes the waters almost too hot to stand, during midsummer. I can open the gravity feed valve and wait if it’s too hot, the 15 gallon box, holds some warm and the colder water mixes in the tank to make it tolerable. With regard to insulation, don’t waste too much time, the water never stays warm enough to get an early AM shower out of it, unless you’re willing to put an insulated cover over the whole thing nightly and remove it every morning.
PS – Outdoor soap dishes need to be well draining….