Here's my newest project/ experiment. It's called the beer can solar heater. I originally saw this project on a Facebook Fan Page on Homesteading. Most of them are big outdoor units and I didn't want to make the money commitment to make a large unit.
So, what I did was made a smaller, portable unit just to see how well it works before possibly expanding on it into a bigger unit.
The Beer Can Solar Heater uses beer or soda cans that are painted black and arranged in pillars that creates upward convection. These pillars are placed in a closed black manifold and a clear front for the sunlight to enter.
The results were pretty good. The temperature within the manifold gets to 110° to 130° F.
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