4 ms·
Where I live solar panels are limited by regulations. They pay for themselves after a couple of years so people would plaster them literally everywhere the sun
by adrianN 3y ago
Where I live solar panels are limited by regulations. They pay for themselves after a couple of years so people would plaster them literally everywhere the sun shines if they were allowed to. White paint otoh probably has worse ROI.
- benj111 3y agoWhite paint (if cheap) on a building you are actively trying to cool would seem to have a very good roi.
- mschild 3y agoI think white shingles for the roof would probably be even more effective. IIRC, a lot homes in hotter climates have started using them. Adding bifacial solar panels is probably a fantastic combination as well.
- adrianN 3y agoA lot less than 1% of the earth‘s surface is buildings.
- benj111 3y agoA negative ROI (return on investment) suggests it won't pay for itself ever, be that in cash or carbon. If you're actively trying to cool the building then painting it in something that lowers the energy needed to cool it. And as were just talking about paint, carbon and cash cost is likely to be low relative to savings. So no, painting all houses in this stuff might not reverse global warming, but that wasn't what we were talking about.
- alpaca128 3y agoThe "white paint" parent is referring to can passively cool the surface a few degrees below ambient temperature 24/7 (yes, even at night). I could imagine worse investments.