+ElectroPig Von Fokkengruuven I've seen those videos, and they are informative, and worth a looksee. 100+ cans hot glued together in an acrylic box with holes in the tops and bottoms. Spray painted flat black, and tilted toward the sun. Small 12V fan sucking/blowing the warm air into a house vent. That could've been a huge help during the days when Troy was in the camper or RV. It could still be an interesting side project with the tiny house on wheels this spring/autumn on the roof. Best of all, the building materials are pretty cheap, and Troy sure has the knowhow to do it. He could even make a tiny solar powered one for the chicken tractor on wheels with a thermostat to turn it off when the moving air drops below a set temp for cloudy days and nights. He could make one for his forklift batteries to keep them warmer than the outside air, so they operate more efficiently. Another for the RV golf cart batteries. Another for heating wash/shower water to a small degree. ElectroPig, great idea.
What's your input, Troy?
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