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Eliminate fossil fuel costs entirely. Solar powers your heat pump for near-zero energy bills. Save $4,020/year with combined state incentives.
Combined Bundle Economics
One Contractor, Both Systems — NuWatt installs solar and heat pumps directly in Princeton. No subcontractors, no lead sharing.
Replace oil & gas heating with a heat pump powered by your solar panels. Save $2,100/yr on fuel alone.
NuWatt designs and installs both systems together. Coordinated permitting, single point of contact, and optimized system sizing.
Combine Mass Save heat pump rebate ($8,500) with Massachusetts solar incentives ($400) for up to $10,400 off.
Heat pumps provide both heating and cooling. Combined with solar, your home stays comfortable all year at near-zero energy cost.
Bundling solar panels with a heat pump is the fastest way for Princeton homeowners to reach near-zero energy costs. A 10 kW solar system generates approximately 12,000 kWh per year—enough to power your entire home plus the additional electricity a heat pump needs to replace your oil & gas heating system. At Princeton Municipal Light Department’s rate of $0.16/kWh, this eliminates roughly $1,920 in annual electric costs while the heat pump saves an additional $2,100 per year versus oil & gas. Combined, that’s $4,020 in annual savings.
Both the federal residential solar tax credit (Section 25D) and the heat pump tax credit (Section 25C) expired December 31, 2025 under OBBBA. However, Massachusetts state and utility incentives remain strong. Massachusetts solar incentives reduce the system cost by $400. The Mass Save heat pump rebate covers up to $8,500. Princeton Municipal Light Department adds a $1,500 utility rebate. Income-qualified households may also receive HEAR rebates of up to $8,000. Combined, these incentives total up to $10,400.
NuWatt Energy designs integrated solar + heat pump systems specifically for Princeton homes. We size the solar array to account for the heat pump’s electricity consumption, ensuring maximum offset from day one. Our team handles everything from system design through Princeton Municipal Light Department interconnection and all rebate applications—one contractor, one project, one point of contact.
10 kW system (sized for heat pump load)
System Cost
$32,700
Massachusetts Incentive
-$400
Solar Net Cost
$32,300
Annual Production
12,000 kWh
Annual Electric Savings
$1,920
25-Year Solar Savings
$70,002
Whole-home system replacing oil & gas
HP Installed Cost
$12,000–$22,000
Mass Save Rebate
-$8,500
Princeton Municipal Light Department Rebate
-$1,500
Annual Oil & Gas Cost
$3,200
Annual Heat Pump Cost
$1,100
Annual Fuel Savings
$2,100
Solar + heat pump bundle for Princeton
Solar Electric Savings
$1,920/yr
Heating Fuel Savings
$2,100/yr
Total Annual Savings
$4,020/yr
25-Year Total Savings
$122,502
Both expired December 31, 2025. State and utility incentives are now the primary way to save.
State solar incentive applied to your 10 kW system.
Mass Save 2026: whole-home $2,650/ton (cap $8,500), partial $1,125/ton, basic $250/ton. R-410A systems no longer qualify — only R-32/R-454B refrigerants. Free home energy assessment included.
Utility heat pump rebate. Stacks with Mass Save.
Up to $8,000 (low-income) or $4,000 (moderate-income). Stackable with other rebates.
+ 287 more towns in Massachusetts
Save $4,020/yr. Free combined estimate, no obligation.
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