Solar in Watertown, MA
With Eversource Massachusetts's electricity at about 32.4¢ per kWh and 1,286 kWh of sun per kW, solar is worth it for a typical Watertown home today: about a 7.6-year payback.
- Payback, typical home
- 7.6 yrsMassachusetts: 7.6 yrs
- 25-year net
- $64,368after paying $18,460
- Sun
- 1,286kWh per kW per year
- Electricity
- 32.4¢80% above U.S. average
A typical Watertown home, by the numbers
| Utility | Eversource Massachusetts |
|---|---|
| Electricity use | 548 kWh a month |
| Best-value system | 5.6 kW, about 13 panels, 7,201 kWh a year (110% of use) |
| Cost | $19,460, or $18,460 after state incentives |
| First-year savings | $2,087 |
| Payback | 7.6 years |
| Exported power | Full retail net metering (Massachusetts rule) |
Cash purchase, no federal credit, 4.0% yearly rate increases. Run it with your own numbers.
Homes in Watertown
- Owner-occupied homes
- 48%
- Single-family detached
- 17%
- Median home value
- $785k
- Median year built
- 1947
- Population
- 35,543
- Roofs suitable for solar†
- 86%
Census ACS 2020–2024. †Share of 6,688 buildings Google Project Sunroof rated technically suitable (2019 snapshot).
Older housing stock. Many homes here were built before 1975. Have the roof and electrical panel checked before signing; a roof or panel upgrade can add thousands. Roof first?
Installers working in Watertown
Public installation records for Massachusetts don't name installers, so we can't rank local companies here. Browse installers in Massachusetts.
Always verify the license and get at least three quotes. Compare quotes side by side.
Questions about solar in Watertown
Is solar worth it in Watertown, MA?
For a typical home in Watertown, solar is worth it at 2026 prices: a 5.6 kW system costs about $18,460 after state incentives, saves about $2,087 in year one and pays back in about 7.6 years. Enter your address for an estimate based on your roof and bill.
How much solar power does a system produce in Watertown?
About 1,286 kWh per year for each kW of panels on a south-facing roof, based on PVWatts and local weather. That's 0% less than the Massachusetts average. East- or west-facing roofs produce roughly 10–20% less.
Who is the electric utility in Watertown?
Most homes in Watertown are served by Eversource Massachusetts, at about 32.4¢ per kWh on average.
How much do solar panels cost in Watertown?
A fair cash price is around $3.35 per watt before incentives, so about $19,460 for a 5.6 kW system. There's no federal tax credit for homeowners who buy in 2026.
Nearby
- Belmont 7.2 yrs
- Newton 7.2 yrs
- Cambridge 7.1 yrs
- Arlington 7.2 yrs
- Waltham 7.2 yrs
- Brookline 7.3 yrs
- Somerville 6.9 yrs
- Medford 6.9 yrs
- All of Massachusetts
Data: PVWatts (National Laboratory of the Rockies), EIA-861 2025 adjusted to 2026, U.S. Census ACS, LBNL Tracking the Sun, state policy research as of October 2026.