Solar Panel Cost in New Hampshire (2026 Estimate)

BySunMetricLab Editorial Team·Independent solar research and calculators

Data last updated September 10, 2026 · ranks #11 of 50 states for modeled payback

New Hampshire averages about 4.2 peak sun hours a day (below the national average) with an approximate residential electricity rate near 22¢/kWh, among the higher rates in the country. In the model used here, an 8 kW system in New Hampshire produces roughly 9,810 kWh a year and trims about $2,200 off annual electricity costs, paying back its net cost in about 8.7 years. Strong sun, high electricity prices, or both put New Hampshire among the faster paybacks in this comparison, and solar tends to make financial sense here for homeowners with suitable roofs.

Estimated system cost and payback in New Hampshire

Costs assume roughly $3.35/watt installed for New Hampshire; the net column applies a 30% federal credit for comparison with quotes that include it. Savings and payback use the state's sun hours and rate above.

The 30% federal Residential Clean Energy Credit ended for systems paid for after December 31, 2025 under the 2025 federal budget law. Net-after-credit figures apply only if you still qualify (for example a 2025 expenditure, or a leased system where the installer passes a credit through). Confirm with a tax professional.

What moves the numbers in New Hampshire

Two inputs drive most of the difference between states: how much sun a system sees and what each offset kilowatt-hour is worth. New Hampshire's 4.2 sun hours set production, and its roughly 22¢/kWh rate sets what that production saves. The bigger unknowns are your roof, shading, and how your utility compensates exported power, since a lower export rate can pull real savings below the retail-rate figure above.

Net metering and export credits in New Hampshire

New Hampshire replaced full retail net metering in 2017 with a net metering tariff that credits monthly surplus at the default energy service rate plus the transmission charge plus a quarter of the distribution charge. Non-bypassable items such as the system benefits charge and stranded cost recovery are not credited, so an exported kilowatt-hour is worth less than an imported one but still captures most of the bill. Within a billing month, however, solar output offsets consumption at the full rate.

Credits carry forward without expiring, and customers can request a cash-out of accumulated credits once a year. Systems up to 100 kW qualify under the small-customer rules, and legislation since 2022 has pushed the upper limit for larger customer-generators to 5 MW, a change that matters for farms and towns more than for a typical house.

New Hampshire solar incentives beyond the federal credit

The Department of Energy administers a residential renewable electric rebate funded through the Renewable Energy Fund; it pays a per-watt amount with a cap around a thousand dollars, and it has been suspended or waitlisted when annual funding runs out, so confirm availability before you rely on it. Because the state has no sales tax, equipment is purchased tax-free, and there is no state income tax on wages that a credit could offset.

Property tax treatment is set town by town: state law lets each municipality adopt an exemption for solar systems, and most larger towns have, but some have not, so check with your town office. Utilities also offer time-of-use and battery pilot programs, including a Liberty Utilities battery program that has operated in phases.

Utilities and rate plans in New Hampshire

Eversource serves most of the state, Unitil covers the Seacoast around Portsmouth and the Concord area, Liberty Utilities handles a band from Salem to Lebanon, and New Hampshire Electric Cooperative supplies much of the rural north and Lakes Region under its own board-set net metering policy. Municipal systems in Wolfeboro, Woodsville and a few other towns round out the map. Residential rates are high, typically well above 20 cents per kilowatt-hour once supply and delivery are combined, which shortens payback even with the trimmed export credit, and default energy service prices reset twice a year, so the credit value moves with them.