I also wondered if geothermal could be run off solar....what I see now, I doubt it. Our biggest complaint is we notice the power draw...the lights get dim (I haven't checked with the electric company as far as what their thoughts might be). I know it's real complicated with the settings, stages etc. on the thermostat and on the geothermal units but we just think the heat strips should not be coming on as often (so we feel it's in the settings). We're waiting on the installer's pro to get back but in the interim we are puzzled. We put the strips in as 'backup' but this geothermal stuff is pretty complicated.
