This is very detailed instructions on building your own soda pop can solar heater. It has step-by-step instructions include the output data from the project.
Build 2KW DIY solar panels out of empty pop cans and cut down utility bills. Solar Thermal heating is becoming more popular with increasing energy prices...
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http://how-to-build-solar-panels.us/diy-power-system-review.html DIY Power System reviewed. DIY Solar Water Heater
Homemade Solar Water Heater, for what, I do not know.
Make a Solar Water Heater for Under $5 : TreeHugger
DIY Solar Water Heater From Plastic Bottles - Make a solar water heater from a pile of plastic bottles and cartons. This is great for the environment as it frees up waste trash and if you decide to build one you could use old bottles or what ever you have available.
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