Also decided I don’t like this whole heat side breaking my solution; so I’m going with a Webasto 2000 St air too with the smart temp to sip off deisel so the heat pump has become less vital in harsh conditions. Dual fuel single zone; simpler than my nest setup at home. Dual electric heaters out; the d@mn 60 gallons of diesel is a second giant battery pack if the gear is quiet and efficient!
haha, the diesel tank is difficult to recharge from the sun.....you could grow soy or canola on top of your roof and press oil from the seeds .. let me know how it goes.
later j