Unitil Energy Systems and solar
Unitil Energy Systems is an investor-owned utility serving about 69,081 homes in New Hampshire. Here's what its rates and export rules mean for solar: for a typical customer, solar is worth it.
- Average price (2026 est.)
- 24.8¢7% below New Hampshire average
- Typical bill
- $155625 kWh a month
- Exports credited
- ~85%Reduced export credit
- Typical payback
- 10.9 yrs6.6 kW, cash
Export rules for Unitil Energy Systems customers
Reduced export credit (New Hampshire rule).
Under New Hampshire's 'net metering 2.0' (since 2017), exported power is credited at the full supply and transmission rate but only 25% of the distribution charge - roughly 80-90% of retail. Systems in place are guaranteed these terms until 2040/2041.
Solar for a typical Unitil Energy Systems home
| System | 6.6 kW (111% of 625 kWh/month) |
|---|---|
| Cost | $21,980 |
| First-year savings | $1,996 |
| Payback | 10.9 years |
| 25-year net | $37,035 |
Uses the utility's average price.
Solar adoption
- Homes with solar (2025)
- 2,574
- Share of customers
- 3.7%
- Residential solar capacity
- 21 MW
- Residential customers
- 69,081
EIA-861, 2025. In competitive markets, some solar is reported by retail electricity providers instead.
Cities served
Questions about Unitil Energy Systems and solar
Does Unitil Energy Systems have net metering?
Unitil Energy Systems follows New Hampshire's rules: Under New Hampshire's 'net metering 2.0' (since 2017), exported power is credited at the full supply and transmission rate but only 25% of the distribution charge - roughly 80-90% of retail. Systems in place are guaranteed these terms until 2040/2041.
How much does electricity cost with Unitil Energy Systems?
Residential customers paid an average of 22.8¢ per kWh in 2025 (EIA), about 24.8¢ adjusted to 2026. The typical home uses 625 kWh a month, a bill of about $155.
Is solar worth it with Unitil Energy Systems?
For a typical customer, solar is worth it: a 6.6 kW system costing about $21,980 pays back in about 10.9 years, with $37,035 net over 25 years.
How many Unitil Energy Systems customers have solar?
About 2,574 homes had net-metered solar at the end of 2025, roughly 3.7% of residential customers (EIA-861).
Legal name: Unitil Energy Systems (EIA ID 24590). Data: EIA-861 2025 and monthly data through 2026, state policy research October 2026.