Eversource Massachusetts and solar
Eversource Massachusetts is an investor-owned utility serving about 1,274,856 homes in Massachusetts. Here's what its rates and export rules mean for solar: for a typical customer, solar is worth it.
- Average price (2026 est.)
- 32.4¢7% above Massachusetts average
- Typical bill
- $178548 kWh a month
- Exports credited
- RetailFull retail net metering
- Typical payback
- 7.3 yrs5.1 kW, cash
Export rules for Eversource Massachusetts customers
Full retail net metering (Massachusetts rule).
Massachusetts investor-owned utilities credit residential solar exports at close to the full retail rate (net metering credits), and credits roll over indefinitely. On top of that, the SMART 3.0 program pays a fixed per-kWh incentive for 20 years.
Solar for a typical Eversource Massachusetts home
| System | 5.1 kW (100% of 548 kWh/month) |
|---|---|
| Cost | $18,035, $17,035 after incentives |
| First-year savings | $2,028 |
| Payback | 7.3 years |
| 25-year net | $62,463 |
Uses the utility's average price.
Solar adoption
- Homes with solar (2025)
- 89,475
- Share of customers
- 7.0%
- Residential solar capacity
- 651 MW
- Residential customers
- 1,274,856
EIA-861, 2025. In competitive markets, some solar is reported by retail electricity providers instead.
Questions about Eversource Massachusetts and solar
Does Eversource Massachusetts have net metering?
Eversource Massachusetts follows Massachusetts's rules: Massachusetts investor-owned utilities credit residential solar exports at close to the full retail rate (net metering credits), and credits roll over indefinitely. On top of that, the SMART 3.0 program pays a fixed per-kWh incentive for 20 years.
How much does electricity cost with Eversource Massachusetts?
Residential customers paid an average of 32.4¢ per kWh in 2025 (EIA), about 32.4¢ adjusted to 2026. The typical home uses 548 kWh a month, a bill of about $178.
Is solar worth it with Eversource Massachusetts?
For a typical customer, solar is worth it: a 5.1 kW system costing about $17,035 pays back in about 7.3 years, with $62,463 net over 25 years.
How many Eversource Massachusetts customers have solar?
About 89,475 homes had net-metered solar at the end of 2025, roughly 7.0% of residential customers (EIA-861).
Legal name: NSTAR Electric Company (EIA ID 54913). Data: EIA-861 2025 and monthly data through 2026, state policy research October 2026.