Solar Panels in New Hampshire: Eversource Rates and the Net Metering Credit System

Federal and State Solar Incentives Available in 2026

The single most powerful incentive for New Hampshire solar buyers remains the federal Residential Clean Energy Credit, commonly called the Investment Tax Credit (ITC). Under the Inflation Reduction Act, homeowners who install solar in 2026 claim 30% of the total installed cost as a direct reduction in federal income tax owed. On a $30,000 system, that is a $9,000 credit — not a deduction, but a dollar-for-dollar reduction in your tax bill. The IRS administers this credit, and NREL research confirms it is the single largest driver of solar adoption in moderate-sunlight states like New Hampshire.

At the state level, New Hampshire offers a property tax exemption for the added value solar adds to your home. A solar system that increases your assessed home value by $25,000 will not raise your annual property tax bill by a dollar — a meaningful benefit in a state where property tax rates average around $20 per $1,000 of assessed value. New Hampshire has no general sales tax, so solar equipment purchases face zero state or municipal sales tax at point of sale. For a full price breakdown by system size and region, see our guide to How Much Do Solar Panels Cost in 2026? Complete US.

The federal solar tax credit calculator can help you confirm exactly how much of the ITC you can claim based on your projected tax liability. If your credit exceeds your tax bill in year one, the remainder carries forward to the following tax year — a useful feature for retirees or lower-income households with modest annual federal tax liability.

New Hampshire does not currently offer a direct state solar rebate or a low-interest loan program through a state agency, which puts it behind states like Massachusetts and Connecticut that carry more layered incentive stacks. This makes accurate system sizing critical: an oversized array inflates upfront costs without a state rebate to cushion the difference, and a longer payback timeline follows. The DOE’s DSIRE database is the most reliable source for verifying any local utility rebates that may appear at the municipal or co-op level in New Hampshire — these small programs open and close frequently and are worth checking before finalizing a contract. Homeowners in Vermont and Maine can benchmark their incentive stacks against New Hampshire’s using state-specific guides in this series. For state-by-state payback data, our guide to Solar Panel Payback Period by State is the most complete resource.

Solar Payback Period and 25-Year Savings for NH Homeowners

With electricity at 23 cents per kWh and installed costs averaging $3.40 per watt, New Hampshire’s solar payback math has improved significantly since 2020. A 9 kW system costing $21,000 net of the ITC — based on a $30,000 gross installation — that offsets $2,070 per year in electricity delivers a simple payback of approximately 10 years. Factor in the 2–4% annual rate of electricity price inflation the EIA has documented over the past decade, and the inflation-adjusted payback shortens to roughly 8–9 years.

Over a 25-year panel warranty period, that same 9 kW system generates cumulative savings of approximately $58,000–$70,000 in present-value terms. SEIA data shows that homes with solar in the northeastern US sell for a premium of roughly 4% compared to comparable non-solar homes, adding $15,000–$20,000 in resale value on a $400,000 property — a benefit that does not appear in simple payback calculations but is real and documented.

Panel degradation is a factor in long-term savings projections. Most Tier 1 monocrystalline panels carry a linear power warranty guaranteeing no more than 0.5% output decline per year, meaning a 9 kW system produces roughly 88% of its original output by year 25. NREL performance modeling for central New Hampshire accounts for this degradation in the $58,000–$70,000 savings range cited above, so no additional discount is required.

If you are weighing a solar loan against a cash purchase, a solar payback period calculator lets you stress-test these assumptions against your actual utility bill and roof characteristics. A 6.5% loan on a $21,000 balance adds approximately $7,400 in interest over 10 years, which extends effective payback by roughly 3–4 years compared to an outright cash purchase. Low-interest financing under 4% keeps payback competitive with cash in most scenarios.

New Hampshire sits climatically between the more favorable mid-Atlantic markets and the more challenging upper Midwest. For context, Maine — with similar latitude and comparable utility rates — shows nearly identical payback windows, while sunnier New Jersey achieves payback in 7–8 years due to higher annual solar production.