We went with heat pumps and a duct system for our primary heating source along with solar, but have a newer/well-insulated house, and a South-facing roof. The roof facing direction can make a huge difference in terms of your solar production, as does insulation. The tax credit was 26% on the solar plus an inverter upgrade when we did it, now it’s up to 30% so keep that in mind as well.

We went with Maine Solar Solutions, and they were great to work with, provided quick estimates. Happy to answer more questions if you have any.