When Massachusetts homeowners switch from oil or gas to a heat pump, one question comes up almost every time: “Won’t my electric bill go through the roof?” It’s a fair concern. A heat pump does use more electricity than your old furnace did. But this is exactly where solar becomes a powerful partner—and why we talk about the two together so often.
Why Your Electric Bill Goes Up After Electrifying
When you stop burning oil or natural gas and start heating with a heat pump, your heating energy shifts onto your electric meter. Your oil or gas bill drops or disappears, but your electric usage climbs, especially in the coldest months.
The good news is that heat pumps are remarkably efficient—they move heat rather than create it, delivering several units of heat for every unit of electricity. But efficient or not, that electricity still shows up on your bill. Solar is how you take control of that cost.
How Solar Offsets Heat Pump Usage
Producing Your Own Power
A rooftop solar array generates electricity during daylight hours. That power either runs your home directly or flows back to the grid. Over a year, a well-sized system can offset a large share—sometimes nearly all—of the electricity your home and heat pump consume.
Net Metering in Massachusetts
This is the key. Under Massachusetts net metering, when your panels produce more than you’re using, the extra energy flows to the grid and you earn credits. On cloudy winter days when your heat pump is working hard and your panels produce less, you draw those banked credits back down.
Because solar tends to overproduce in the long summer days and heat pumps consume most in winter, net metering lets you effectively “store” summer sunshine to help cover winter heating. It’s a natural seasonal balance.
Sizing Solar for a Home with a Heat Pump
This is where a lot of homeowners get it wrong. If you size a solar system for your old electric usage—before the heat pump—you’ll come up short. We plan solar arrays around your future electrified usage, including the heat pump’s winter load, EV charging if that’s on your horizon, and any other electric upgrades.
An undersized array leaves you paying for grid power you could have offset. An oversized one may produce more than net metering rewards. Getting the size right is the whole game.
What About Roof and Shading?
Homes across Chelmsford, Andover, and North Andover vary a lot—some have big south-facing roofs, others have mature trees and dormers. We assess orientation, shading, and roof condition before recommending anything. Not every roof is a good solar candidate, and we’ll tell you honestly if yours isn’t.
Realistic Expectations
Solar won’t always zero out your bill in every month. Winter is short on daylight, and your heat pump runs hardest exactly then. What solar does is dramatically reduce your annual electric cost, smoothing out the seasonal swings through net metering credits. Many homeowners find their combined solar-plus-heat-pump energy costs are lower than what they used to pay for oil or gas heating.
Incentives
Both solar and heat pumps have incentives available in Massachusetts, and these programs evolve. Rather than quote figures that may be outdated, we point homeowners to current heat pump programs at masssave.com and review solar-specific incentives with you directly, since they come from different programs.
The Bottom Line
Going electric doesn’t have to mean a scary electric bill. Pairing a properly sized heat pump with a properly sized solar array is one of the smartest moves a Merrimack Valley homeowner can make. The two systems are designed to work together, and planning them as one project—not two separate afterthoughts—gets you the best result.
If you’re thinking about electrifying and want an honest look at how solar would offset your heat pump usage, reach out to us and we’ll run the numbers with you.