When I went solar two years ago, my biggest energy expense wasn’t electricity — it was natural gas for heating. My solar panels were offsetting most of my summer electricity bill, but winter was a different story. Gas furnace running constantly, $180/month gas bills, and my solar production was sitting unused because my biggest loads were on a completely different energy source.
Adding a heat pump to my solar setup was the move that finally made my home energy system feel complete. Here’s exactly what I did, what it cost, and what my actual bills look like now.
The Core Problem: Solar Only Helps With Electricity
Most homes that go solar still burn natural gas (or propane) for heating and hot water. That means you’ve got two separate energy systems — one you’re generating yourself, one you’re still buying from a fossil fuel provider. The path to true energy independence — and maximum solar ROI — runs through electrifying everything.
Heat pumps make this possible because they’re extraordinarily efficient. A conventional electric resistance heater converts 1 kWh of electricity into 1 kWh of heat. A heat pump extracts heat from the outside air (even at temperatures below freezing) and moves it indoors, delivering 2-4 kWh of heat for every 1 kWh of electricity consumed. That ratio is called the Coefficient of Performance (COP), and it’s why heat pumps are the missing piece of the solar puzzle.
What I Installed and What It Cost
I already had a 10kW solar array on the roof. I added:
- A cold-climate heat pump: I went with a Mitsubishi Hyper-Heat mini-split system rated to -13°F. Four zones, 36,000 BTU total. Installed cost: $14,200.
- A heat pump water heater: Rheem ProTerra 50-gallon. This replaced a gas water heater that was burning about $40/month in gas alone. Installed cost: $1,800 after a local utility rebate.
Total out of pocket after the 30% federal tax credit (IRA clean energy credit): roughly $11,200. I also received state efficiency rebates totaling $1,500, bringing it closer to $9,700 net.
The Energy Math
Before the heat pump, my annual energy spend looked like this:
- Electricity (net, after solar): ~$420/year
- Natural gas (heating + water): ~$1,680/year
- Total: ~$2,100/year
After switching to heat pumps, my gas account is closed. Everything runs on electricity. My solar system now covers most of my heating load too, because I’m no longer running gas — I’m running efficient electric equipment that my panels can offset.
First full year with the heat pump system:
- Electricity (net, after solar): ~$680/year (higher than before because heat is now electric)
- Natural gas: $0
- Total: ~$680/year
That’s $1,420/year in savings. At that rate, the heat pump investment pays back in under 7 years — and the equipment should last 15-20 years. The real payback was faster because of the tax credits and rebates.
Does Solar Actually Cover Heat Pump Loads?
This is the question I got most from neighbors when I told them what I was doing. The concern: heat pumps run in winter, solar produces less in winter. Won’t you just shift your gas bill to a bigger electric bill?
Partially, yes. My winter solar production is significantly lower than summer. But there are a few things that make it work better than expected:
- Heat pumps are so efficient that total kWh consumption is lower than expected. Even in cold months, my heat pump uses far fewer kWh than a resistance electric heater would.
- Net metering bank: I built up significant credits during peak summer production. Those credits offset my higher winter draws. Without net metering, the math would be less favorable.
- Time-of-use optimization: With a smart thermostat — I use an ecobee SmartThermostat — I can pre-heat the house during midday when my solar is producing most, then let it coast through the evening. This maximizes self-consumption and minimizes grid draw.
What the Tax Credits Look Like in 2026
The Inflation Reduction Act (IRA) energy credits are still in effect for 2026, though the political landscape means you shouldn’t wait indefinitely. Currently available:
- Heat pump HVAC: 30% federal tax credit, up to $2,000/year (25C credit)
- Heat pump water heater: 30% federal tax credit, up to $600
- Electrical panel upgrade (if needed): 30%, up to $600
- State and utility rebates: Vary widely — DSIRE.org is the best database to check your state
If you haven’t gone solar yet and are considering doing both, the combination is especially compelling: you can size your solar system at installation to account for the additional heat pump load, which is more cost-effective than adding panels later.
What I’d Do Differently
Honestly, not much — but I wish I’d gone with a larger solar array from the start. I sized my system for my then-current electrical load, not my future electrified-everything load. Adding 2-3 more panels now would cost more per panel than it did during the initial installation.
If you’re planning a solar install and even thinking about eventually getting a heat pump or EV, size your system for the electrified future. The incremental cost of a larger system at installation is small compared to adding panels later.
The Bottom Line
Solar + heat pump is the combination that makes a home genuinely energy independent. Solar handles most of the electricity. The heat pump handles heating and hot water with exceptional efficiency. Stack in a battery and you’ve got a home that can operate largely off-grid during outages.
The economics work. The tech is mature. The incentives are still available. If you already have solar and are still burning gas for heat, this is the upgrade that completes the picture.