Bore hole or ground based heat pumps is still more effective on a give/take scale, but the latest air to water pumps are getting there.
I guess for where you are, this doesn’t matter much because of the general temperature.
But for us higher up there is still the -20C and below efficiency that matters. My heat pump (500 meter ground line) has worked great for 6 years now. It has this “hotgas” exchanger that produces warm water for free as long as there is a need for heating which is based on the outside temperature. Those periods it doesn’t need to run on its warm water producing mode.
I also have a wood stove placed in a open furnace that warms up plenty, so I set the water radiators vents to turn off at 20C.
Oh how much I want solar panels, but as for now i only see it feasible if I had that money in the pocket and didn’t have to take a loan on the house.
It will be rough economically, my electric bill has already gone up plenty. It’s time to turn the heat pump down 2 degrees and put on socks