We recently purchased a lake cabin in MN that has a Carrier heat pump (25HPA 536A0031010) plus two electric assist (I believe 18kva each) and an Infinity control. It is a 4-season cabin that we use 2 or 3 weekends per month during the winter. My initial plan was to keep the temp at 40f or 45f when we're not there and then heat up to 65f when we are. I'd like to limit the use of the electric assist to save money. Looking for advice on all of this though.
Is this a reasonable plan?
How low of outside temp will the heat pump function? EG, as long as the temps won't be below +5f or 0 or -5f or ?? can I switch to heat pump only on the thermostat and have it maintain temp (40f during week, 65f weekends)?
I assume I need the electric assist to heat it up from 45f to 65f? At what outside temp could the heat pump likely handle this alone in a reasonable time like maybe 4 - 8 hrs?
I've scoured the web and haven't come up with much.