| Peak sun hours per day | 3.9 – 4.5 |
|---|---|
| Annual kWh per kW installed | 1,100 – 1,350 |
| Typical system size | 8 – 9.5 kW |
| Electricity rates | Among the highest in the country |
| Export credit regime | Net billing / avoided-cost exports |
How New Hampshire credits the power you export
Exported power is credited at something closer to what the utility avoids paying to generate it, which is well below the retail rate. Power you use in the house as it is produced is worth full retail; power you send to the grid is worth considerably less.
That gap is the whole game. Self-consumption is worth multiples of export, so shifting load into daylight hours — or adding storage to move production into the evening — changes the payback materially.
Which specific tariff applies to you is a question for your utility, not for New Hampshire as a whole — several utilities operate in most states and their terms differ. Check the current rules before you sign anything.
The general mechanics are in net metering explained; this is how they land in New Hampshire.
What a system costs here
New Hampshire pricing sits broadly within the national band of $2.50–$3.50 per watt before incentives, so a typical 8 – 9.5 kW system lands somewhere around $20,000–$33,000 before credits. Local labour rates, permitting fees and whether you need an electrical panel upgrade move that more than the panel brand does. Full breakdown in what solar panels cost.
Incentives that stack in New Hampshire
| Layer | What it does |
|---|---|
| Federal clean energy credit | A federal credit against the cost of a residential system. Federal incentive law changed in 2025, so confirm the current rate and eligibility before you count on it. |
| Export credit | Net billing / avoided-cost exports — net billing is what New Hampshire generally applies, subject to your specific utility's tariff. |
| State and local layers | Property-tax and sales-tax exemptions, utility rebates and certificate markets exist in many states and change often. DSIRE lists what is live where you are. |
When solar is a poor fit in New Hampshire
- A roof with less than about ten years of life left — replacing it later means paying to remove and reinstall the array.
- Heavy shade from trees or neighbouring buildings for much of the day. Micro-inverters help at the margin; they do not manufacture sunlight.
- North-facing-only roof planes. At this latitude the production penalty is large enough to change the answer.
- A household that is out all day and will not add storage. Under an export credit below retail, exported power is worth a fraction of what you save by using it yourself.
- Planning to move within about five years. You will likely recover some of it in the sale price, but not reliably all of it.
The universal disqualifiers apply here too — renting, a roof near end of life, or moving within a few years. See roof age and solar and what happens when you sell.
New Hampshire solar questions
Is solar worth it in New Hampshire?
It depends on three things: what you pay per kilowatt-hour, what your utility credits you for exported power, and how much unshaded roof you have. New Hampshire runs net billing and residential rates land around 22–34¢ per kWh, so the honest answer is that it works well for some homes here and poorly for others. The quickest test is your own bill: the larger it is, the more there is to offset.
How many solar panels does a house in New Hampshire need?
A typical household using about 10,500 kWh a year needs roughly 8 to 9.5 kW here, which is about 20 to 24 modern 400 W panels. Your own consumption matters far more than any state average — pull twelve months of bills before sizing anything.
How much power does solar produce in New Hampshire?
Plan on roughly 1,100–1,350 kWh per year for every kilowatt installed, based on 3.9–4.5 peak sun hours a day and a normal system derate. A 8 kW system therefore produces somewhere near 8,800 kWh a year — well above that in June, well below it in December.
What does New Hampshire pay for exported solar power?
Net billing / avoided-cost exports. The exact credit depends on your utility and your tariff. Export rules are set by commissions and do change, so confirm the current terms rather than relying on any published summary, including this one.
Do solar panels work in New Hampshire winters?
Yes, at reduced output. Panels are more efficient when cold; the losses come from shorter days and lower sun angles, not from temperature. Expect production to swing substantially between summer and winter, which is what annual figures are for.
General information for New Hampshire homeowners, not financial, tax or engineering advice. Figures are planning ranges; your own quote depends on your roof, your consumption and your utility.