Is it worthwhile to run water through your rooftop solar panels to cool them down while pre-heating your hot water? Or maybe heating your pool? Also solar air and water heaters. As always, YMMV, but this is why I didn’t do it.
Answering a Twitter question:
https://x.com/axion2003/status/1812740667367460971
Heat Pump Hot Water vs Gas: https://www.youtube.com/watch?v=iavM2IqueM8
Heat Pump Hot Water Energy Usage: https://www.youtube.com/watch?v=WtGlolw-BxA
Pool heat pump sizing: https://www.youtube.com/watch?v=oWi6pgg1W1A
Forum: https://www.eevblog.com/forum/blog/eevblog-1630-solar-panels-for-water-pre-heating/