My other project for the day. The worlds cheapest solar panel. - TopicsExpress



          

My other project for the day. The worlds cheapest solar panel. A 1*4 frame with a cardboard backing. The cardboard is covered in adhesive mylar but you could use household aluminum foil. Cut a 1*3 hole in the bottom and two 1 inch square holes in the two top corners. Paint the inside flat black and slip it into your window frame from the inside. Youll be amazed at how much heat this gives off on a sunny day.
Posted on: Thu, 01 Jan 2015 19:58:48 +0000

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