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NSTAR Electric Company
NSTAR Electric Company served 306,795 residential customers in Massachusetts in 2025 (10.5% of the state's residential customers), the 1st largest of 59 utilities reporting there. Bundled service; ownership: investor owned; balancing authority ISNE.
The meter, one average month.
Scroll to run 30 days of NSTAR Electric Company's average residential use through a five-dial register.
- Used so far
- 474 kWh
- At 21.49¢/kWh
- $102
Price ruler0 to 50¢ per kWh
Where 21.49¢ sits.
NSTAR Electric Company averaged 21.49¢ per kWh against a Massachusetts residential average of 30.48¢: 29.5% below the state figure. Among the 4 investor owned utilities in Massachusetts with bundled residential sales, it ranks 1st from the lowest price.
2020 and 2025EIA-861
Five years, same meter.
In 2020 the average NSTAR Electric Company home used 532 kWh a month at 22.39¢ and paid $119. In 2025 it used 474 kWh at 21.49¢ and paid $102: the price per kWh is down 4%.
| Measure | 2020 | 2025 |
|---|---|---|
| Price, ¢/kWh | 22.39 | 21.49 |
| Use, kWh a month | 532 | 474 |
| Bill, US$ a month | 119.06 | 101.86 |
| Class | Customers | MWh sold | ¢/kWh |
|---|---|---|---|
| Residential | 306,795 | 1,744,885 | 21.49 |
| Commercial | 33,547 | 803,411 | 17.69 |
| Industrial | 298 | 50,107 | 23.13 |
Who else is on the line
Homes are one class.
Homes took 67.2% of the electricity NSTAR Electric Company sold in Massachusetts in 2025.
Rooftop solar on its linesnet metering
89,475 roofs.
- Residential net-metered PV
- 89,475installations reported for 2025
- Capacity
- 651.4 MWresidential, net metered
- Per 1,000 homes
- 291.6installations per 1,000 residential customers
Service territoryEIA-861
11 counties.
BarnstableBerkshireBristolDukesFranklinHampdenHampshireMiddlesexNorfolkPlymouthSuffolk
Counties in Massachusetts where NSTAR Electric Company reported serving customers in 2025 (11 in all; up to 24 listed).
EIA-8612025Utility 54913
The filing, line by line.
| Measure | Value | Unit |
|---|---|---|
| Average price | 21.49 | ¢/kWh |
| Massachusetts average price | 30.48 | ¢/kWh |
| Difference from state average | -29.5 | % |
| Price change over 5 years | -4.0 | % |
| Typical monthly use | 474 | kWh |
| Typical monthly bill | 101.86 | US$ |
| Residential customers | 306,795 | accounts |
| Share of MA residential customers | 10.5 | % |
| Size rank in MA | 1 of 59 | by customers |
| Price rank, investor owned peers | 1 of 4 | 1 = lowest |
Rate plans on fileOpenEI URDB
18 active plans.
- Time-of-use
- 0more than one energy period within a month
- Seasonal only
- 0price changes by month, not by hour
- Median fixed charge
- $7.50US dollars per month
- Median flat energy rate
- 12.53¢cents per kWh, one period and one tier
Active residential plans: not ended, started within the last 5 years, latest version of each plan name. Time-of-use means more than one energy period within a single month; plans whose price changes only by season are counted as seasonal.
Massachusetts: state average, five-year steps and every provider