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Solar vs. Grid Electricity in New Hampshire

Compare the 25-year cost of solar energy to staying on grid electricity, accounting for utility rate escalation, panel degradation, and IRA credits.

In New Hampshire, the average homeowner pays $25.2¢/kWh for grid electricity. With historical escalation of 3-8% per year, this rate is projected to reach $67.2¢/kWh in 25 years (at 4% escalation). A 7 kW solar system locks in an effective rate of $0.177/kWh for the life of the system.

The math is straightforward: grid electricity costs more every year while solar LCOE stays fixed. By year 10, the utility rate reaches approximately $37.3¢/kWh, nearly 2.1x the solar LCOE. This growing gap is the engine that drives solar ROI.

25-Year Cost Comparison

MetricSolarGrid Only
Effective rate (year 1)$0.177/kWh$25.2¢/kWh
Effective rate (year 25)$0.177/kWh$67.2¢/kWh
25-year discounted cost$32,536$52,129
Net savings (NPV)$21,202

Solar in New Hampshire produces 1,200 kWh per installed kW per year. A 7 kW system generates 8,400 kWh annually, offsetting 80% of the average household's 10,500 kWh annual consumption. After the 7-year payback period, every additional year of operation is pure savings.

Frequently Asked Questions

Is solar vs grid worth it in New Hampshire?
With New Hampshire's average utility rate of $25.2¢/kWh and solar irradiance of 1,200 kWh/kW/yr, the 25-year NPV for a 7 kW solar system is $21,202. Use Elovane to model your specific situation.
What incentives are available for solar vs grid in New Hampshire?
The federal IRA provides a 30% ITC for solar and battery installations (through 2032) and up to $2,000 in 25C credits for heat pumps. Income-qualified households may receive additional point-of-sale rebates through the HOMES and HEAR programs.
How long does solar vs grid take to pay back in New Hampshire?
Solar panels in New Hampshire pay back in approximately 7 years. Battery payback depends on TOU rate spreads. Heat pump payback ranges from 5-12 years depending on current fuel costs and local electricity rates.

Other Comparisons for New Hampshire

Solar + Battery›Heat Pump›Full Electrification›

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