One of the things I've been working on are open source designs that transform sunlight into heat. I used cardboard, black aluminum foil and tacks for much of th

One of the things I've been working on are open source designs that transform sunlight into heat. I used cardboard, black aluminum foil and tacks for much of the heat for my home this past winter. I'm also working on a simple open source design for an outdoor solar thermal panel that heats air to 130F. It can be built using diy vacuum forming and foam insulation. I have a vision of open source diy solar thermal fixing the market failure you are talking about.