Solar Panel Cost in Londonderry, NH
Updated 2026 guide to solar panel prices, savings, and payback period in Londonderry.
Estimated Solar Savings
Solar Panel System Costs in Londonderry, NH
Below are estimated costs for different solar panel system sizes in Londonderry, including the 30% federal solar tax credit.
| System Size | Cost Before Incentives | Federal Tax Credit (30%) | Net Cost | Est. Annual Production |
|---|---|---|---|---|
| 4 kW | $12,400 | -$3,720 | $8,680 | 5,548 kWh |
| 6 kWMost Popular | $18,600 | -$5,580 | $13,020 | 8,322 kWh |
| 8 kW | $24,800 | -$7,440 | $17,360 | 11,096 kWh |
| 10 kW | $31,000 | -$9,300 | $21,700 | 13,870 kWh |
| 12 kW | $37,200 | -$11,160 | $26,040 | 16,644 kWh |
What Affects Solar Panel Cost in Londonderry?
The average cost of solar panels in Londonderry, NH is approximately $310/watt before incentives. For a typical 6kW residential system, that means a total cost of about $18,600 before the federal tax credit.
After applying the 30% federal Investment Tax Credit (ITC), your net cost drops to approximately $13,020.Londonderry homeowners typically see a payback period of 8 years and save an estimated $33,000 over 25 years.
Factors that affect your cost in Londonderry:
- System size: Larger systems cost more but have a lower cost per watt
- Equipment quality: Premium panels and inverters cost more but offer better efficiency
- Roof complexity: Steep roofs, multiple levels, or shading can increase installation costs
- Local labor rates: Installation costs vary within the Londonderry metro area
- Local permits: Permitting costs and requirements vary by municipality in Londonderry
- Incentives: State and local programs can significantly reduce your out-of-pocket cost
Solar Incentives Available in Londonderry
Federal Solar Investment Tax Credit
30% Federal Tax Credit (ITC)
New Hampshire homeowners can claim the 30% federal ITC. Combined with the state rebate program, solar becomes an excellent investment.
State & Local Incentives
NH Residential Solar Rebate
RebateNew Hampshire offers a state rebate for residential solar installations through the Renewable Energy Fund.
Property Tax Exemption
Property TaxNew Hampshire municipalities can vote to offer property tax exemptions for solar energy systems.
Net Metering
New Hampshire offers net metering at the full retail rate for residential solar systems up to 100 kW. Excess credits can be carried forward.
AvailableSRECs
New Hampshire does not have a traditional SREC market, but the state's Renewable Portfolio Standard includes a solar carve-out that supports solar development.
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Top Solar Companies in Londonderry, NH
Sunergy Solutions LLC
Green Power Energy
SUNation Energy
Solar Panel Cost FAQ - Londonderry, NH
The average cost of solar panels in Londonderry is approximately $3.10 per watt before incentives. A typical 6kW residential system costs about $18,600 before the 30% federal tax credit, bringing the net cost to around $13,020.
The typical payback period for solar panels in Londonderry is approximately 8 years. After that, you'll enjoy free electricity for the remaining 15-20+ years of your system's life, saving an estimated $33,000 over 25 years.
Londonderry homeowners can take advantage of the 30% federal solar tax credit, which reduces your system cost by 30%. New Hampshire also offers net metering, and various state-level incentive programs. Check our incentives page for the complete list.
Londonderry homeowners can save an estimated $33,000 over 25 years by going solar. Actual savings depend on your electricity usage, system size, roof orientation, and available incentives. With electricity rates averaging $0.21/kWh in New Hampshire, solar provides significant long-term savings.
Solar Costs in Other New Hampshire Cities
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