How much do solar panels cost in New Hampshire in 2026?
A home solar system in New Hampshire typically costs between $18,720 and $29,640 before any state or utility incentives, for a system sized to a typical home. Because New Hampshire's electricity is relatively expensive, each dollar spent tends to buy back more in avoided grid costs. Note that the 30% federal tax credit is no longer available for systems placed in service after December 31, 2025, so these are the amounts most homeowners will actually finance or pay.
Typical system price
$23,400
7.8 kW · before incentives
Installed price per watt
$2.40–$3.80
Mid-point $3.00/W
Price range (typical size)
$18,720–$29,640
Low to high installer pricing
What a solar system costs in New Hampshire
The spread comes mostly from system size and price per watt. In New Hampshire, a typical home needs roughly a 7.8 kW system to offset most of its usage, which lands around $23,400 at a mid-range installed price. Smaller systems cost less outright; larger systems cost more but can cover more of a high electricity bill.
Solar panel cost by system size in New Hampshire
| System size | Low | Typical | High | Est. annual kWh |
|---|---|---|---|---|
| 5 kW | $12,000 | $15,000 | $19,000 | 6,250 kWh |
| 6 kW | $14,400 | $18,000 | $22,800 | 7,500 kWh |
| 8 kW | $19,200 | $24,000 | $30,400 | 10,000 kWh |
| 10 kW | $24,000 | $30,000 | $38,000 | 12,500 kWh |
| 12 kW | $28,800 | $36,000 | $45,600 | 15,000 kWh |
Estimated pre-incentive install prices for New Hampshire at $2.40–$3.80 per watt. Annual production assumes local yield; your roof and shading will differ.
Solar price per watt in New Hampshire
Installed solar cost is usually quoted in dollars per watt. In New Hampshire we model a range of $2.40–$3.80 per watt (a mid-point of $3.00), which covers panels, inverter, racking, wiring, permits, labor, and installer margin. Getting competitive quotes is the single biggest way to move this number.
What drives solar cost in New Hampshire
What moves the price in New Hampshire: system size (bigger arrays cost more but offset more), panel and inverter tier, roof complexity (steep, shaded, or multi-plane roofs cost more to install), whether you add a battery, and your installer's pricing. Local production is about average, so sizing tracks fairly closely with your electricity usage.
Right-sizing matters more without the federal credit. Oversizing the roof to "go big" now means financing the full cost yourself. In New Hampshire, sizing the system to your own daytime usage — especially since exported energy is credited below full retail here — often gives a better return per dollar than maxing out the array.
Cost after incentives in New Hampshire
Because there is no federal residential tax credit in 2026, the numbers above are close to your net cost. Any remaining savings come from New Hampshire state programs, utility rebates, or local incentives, which vary and change often. Check the current programs for New Hampshire before you sign, and treat any installer's incentive claims as something to verify independently.
Will it pay off? Cost vs savings in New Hampshire
Cost is only half the question — what matters is the payback. Whether that cost pays off in New Hampshire depends on your rate, production, and export credit — run your own bill through the calculator to see.
Getting solar quotes in New Hampshire
The best way to control cost in New Hampshire is a simple apples-to-apples comparison: same system size, same offset target, price per watt side by side, and the full 25-year cost — cash, loan, lease, and PPA all look different once you do that.
Sources & last updated
Current estimateLast updated July 7, 2026. Cost ranges are modeled estimates, not installer quotes.
- IRS — Residential Clean Energy CreditFederal residential credit not available for property placed in service after Dec 31, 2025.
- EIA — Residential electricity price (retail-sales, RES)Fetched July 7, 2026
- Fallback estimate (representative, not live)
- DSIRE — New Hampshire incentivesVerify current state and utility incentives.