@TimMLatimer - what residential geothermal solutions that couple with solar+storage are out there? Have a high end, do it yourself residential, in northern California consulting with me.
.@SolarInMASS Here's a link to a detailed description of a Zero Net Energy home in Northern California that combines solar with geothermal. The author, and homeowner, is Bill Martin, President of California Geothermal Heat Pump Association.
https://www.californiageo.org/wp-content/uploads/Quincy-ZNE-Performance-Final-6-6-18.pdf …