DIY Solar Heater Panel Mark 2. Cheaper ($5.00), hotter (170 degs F) and easier to build. That’s what we call progress. And it looks so beautiful, in a post-apocalyptic, art trasheau kinda way. Nice.
After our first attempt at a home built proof of concept solar thermal panel, we were a bit disappointed with the results. It took about 4 hours before the thing started work, and was a bit costly (at over 50 dollars) to make. I knew it could be done better and cheaper. My first mistake with the first one was purchasing everything new. With ample reusable resources at the local town dump I knew it could be done on the cheap.