I can't dig up my suburbun yard...
I have PV on my all my sun-facing roof, and I'm looking at DIY converting all my PV panels to PVT panels, to opportunistically gather heat, and then make a liquid to liquid heat pump with R290 in the style of this forum.
While googling I came across this company: triplesolar.eu/en/pvt-heat-pump-with-propane-as-refrigerant/
Here is a thread on the diysolarforum that I made: diysolarforum.com/threads/interesting-product-i-came-across.35043/
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