Solar panels in Manchester, NH: cost and payback (2026)
$24,800 installed at the New Hampshire average of $3.10 per watt.
- Payback
- 9.5 yrs
- Rate held flat
- Monthly offset
- $208
- At 25.5¢ per kWh
- Eversource Energy
- Investor-owned utility
- 4.2 peak sun hours
- Federal credit: $0, ended
Sources: EIA Electric Power Monthly, Table 5.6.A (residential retail rates)NREL PVWatts / NSRDB (peak sun hours and production)DSIRE (state and utility incentives)
Solar panels in Manchester cost about $24,800 installed for an 8 kW system, and $23,800 net. There is no federal homeowner credit in that figure — the 30% credit ended for systems placed in service after December 31, 2025. At 25.5¢ per kWh that system offsets roughly $208 a month and pays itself back in 9.5 years — assuming Eversource Energy, which serves most of Manchester, credits what you export.
- 8 kW system, installed
- $24,800
- Federal credit (IRC 25D)
- $0 — ended
- NH Residential Renewable Electric Generation Rebate
- −$1,000
- Net cost
- $23,800
- Serving utility
- Eversource Energy
- Monthly bill offset
- $208
- Payback
- 9.5 years
Cost, rate and sun hours are New Hampshire statewide figures from EIA and NREL — we do not publish a separate Manchester rate or sun-hour value we cannot source. The utility is the part that is genuinely local, and it is the part that changes the answer most. Incentives are modelled for today’s date, so nothing expired is counted.
Eversource Energy: what it means for solar in Manchester
- Serving utility
- Eversource Energy
- Ownership
- Investor-owned utility
- Bound by the state net metering rule
- Yes
Eversource Energy serves most of Manchester. It is investor-owned utility — regulated by the state public utility commission, so the statewide net metering or net billing rule below is the one that applies to you, and any change to it goes through a public docket you can read.
Because Eversource Energy answers to the state commission, the New Hampshire rule is the one that governs your exports: New Hampshire credits residential exports at the full energy and transmission charge but not distribution, so a kilowatt-hour sent back is worth a bit less than one bought.
Whichever it is, this is the first question to settle and the one installers are least specific about. Ask for the rider or tariff name, the per-kWh export credit, how long that credit is locked for, and the current interconnection turnaround — in the written quote, not in conversation. Service territories cut across city limits, so confirm against the name at the top of your own bill.
Cost by system size in Manchester
Within one city, quotes still spread. A steep or cut-up roof costs more in labour than a simple south-facing plane. A main service panel at capacity adds a four-figure upgrade before a single module goes up. Two storeys costs more than one. None of that shows up in a per-watt average, which is why the table below is a starting point rather than a quote.
- 6 kW15 panelsGross cost$18,600State incentive−$1,000Net cost$17,600Yr 1 savings$1,876Payback9.4 yrs
- 8 kW20 panelsGross cost$24,800State incentive−$1,000Net cost$23,800Yr 1 savings$2,502Payback9.5 yrs
- 10 kW25 panelsGross cost$31,000State incentive−$1,000Net cost$30,000Yr 1 savings$3,127Payback9.6 yrs
Modelled, not quoted. Production is system size × 4.2 peak sun hours × 365 days × 0.8 for inverter, wiring, soiling and heat losses. Savings value that production at 25.5¢ per kWh and hold the rate flat for year one. Panel count assumes 400 W modules. Your roof, your shade and your usage move all of it.
No federal credit is in these numbers. The 30% homeowner credit (IRC Sec. 25D) ended for systems placed in service after December 31, 2025. Net cost above is gross cost minus whatever state or local money is still open — nothing else. If a quote knocks 30% off and calls it a federal credit, ask which statute they are citing.
Your roof, not the Manchester average.
Five questions about your shade, roof age and actual bill. See the arithmetic for your own address before anyone calls you.
Permits and approvals in Manchester
Two approvals, two bodies. The Manchester building department issues the electrical and structural permit. Eversource Energy issues permission to operate once the work is inspected and, where required, the meter is swapped. Nothing generates a single legal kWh until the second one lands, and the two queues do not move at the same speed.
Permit fees and turnaround vary by jurisdiction and we do not track them, so we are not going to print a number we cannot source. Make the installer put the permit cost and the expected wait for both approvals in the written quote instead of leaving them as a line you discover afterwards.
Incentives and the full state picture: solar panels in New Hampshire.
Questions from Manchester
How much do solar panels cost in Manchester?
A 8 kW system in Manchester models at $24,800 installed and $23,800 net, at the New Hampshire average of $3.10 per watt. There is no federal homeowner credit in that — the 30% credit ended for property placed in service after December 31, 2025. Quotes inside one city still vary by several thousand dollars depending on roof pitch, panel choice and whether the main service panel needs upgrading.
Who is the electric utility in Manchester?
Eversource Energy serves most of Manchester. It is investor-owned utility — regulated by the state public utility commission, so the statewide net metering or net billing rule below is the one that applies to you, and any change to it goes through a public docket you can read. That matters more than it sounds: your utility, not your installer and not the state, sets what an exported kWh is worth and how long permission to operate takes. Service territories cut across city limits, so check the name at the top of your own bill.
Should I add a battery in Manchester?
It depends entirely on what Eversource Energy pays for exports. Where exports are credited at or near the full retail rate, the grid is already a free battery and a real one rarely pays for itself. Where exports are credited well below retail — which is the direction most tariffs have moved — storing your own afternoon production and using it at night is worth more than selling it. Get the export credit in writing first, then price the battery against it.
Does Eversource Energy pay for solar you send back to the grid?
Eversource Energy is an investor-owned utility, so the New Hampshire rule applies to it: New Hampshire credits residential exports at the full energy and transmission charge but not distribution, so a kilowatt-hour sent back is worth a bit less than one bought. Ask for the specific rider name and the credit rate in writing before you sign — it is a tariff, and tariffs get refiled.
Is solar still worth it in Manchester now the federal tax credit is gone?
On these numbers it pays back in about 9.5 years with no federal credit at all — $23,800 net against roughly $2,502 of electricity offset a year. New Hampshire still runs NH Residential Renewable Electric Generation Rebate, worth roughly $1,000 here, and that is already in the figure. What decides it in Manchester is the 25.5¢ per kWh you pay now and what Eversource Energy credits your exports at, not the subsidy that ended.
Where to look next
See your numbers before anyone asks for yours.
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