Heat your garage or green house with solar power. At the bottom of the post is a link to a bigger, better soda pop panel but this is the "tutorial"
'Now here’s a true gem, shot in the 1980′s on the island of Malta. It’s a custom bodied (duh!) bread van, built on an ex-Army Bedford truck chassis, using some vintage American car parts in the process.'
Soda can solar heater, v2, completed | Hemmings Daily
Eufaula, Oklahoma, 1940 | Hemmings Daily