Residential tariff · MA
Greater Boston Residential R-1 (A1)
NSTAR Electric Company · Flat · filed 2026
What this tariff charges
| Fixed charge | $7.50 per month |
|---|---|
| Structure | Flat |
| Filed | 2026-02-01 |
Energy rates
The charged price is the base rate plus its adjustment. Adjustments carry fuel and rider costs and are frequently most of the bill, so a comparison built on the base rate alone is meaningless.
Energy charge
| Tier | Up to | Base | Adjustment | Charged $/kWh |
|---|---|---|---|---|
| 1 | no limit | 0.09591 | 0.00000 | 0.09591 |
What it costs at different usage levels
| kWh per month | Annual total | Effective $/kWh |
|---|---|---|
| 500 | $665.46 | $0.1109 |
| 1000 | $1,240.92 | $0.1034 |
| 2000 | $2,391.84 | $0.0997 |
Effective rate includes the fixed charge, which is why it falls as usage rises.
Rooftop solar on this tariff
A 7 kW system costing $21,000 before incentives would save between $482 and $874 a year on this tariff, paying back in 24–44 years . No federal tax credit is included: Section 25D ended on December 31, 2025.
no sell rate filed, but this utility reports residential net metering - the range spans no export credit to full retail netting. Compare across this state →
The utility's own description
This rate is available for lighting, heating and other uses in residential premises, for service in an edifice set apart exclusively for public worship, condominium common areas (per M.G.L. Chapter 164 Section 94H), and cooperative apartment common areas (per D.P.U. 1720) excluding hotels and apartment buildings of ten or more dwelling units where the bills are not rendered by the Company directly to the individual tenants. This rate is closed for expansion to nursing homes.
URDB rate id 6987eac550272414cb04176f · utility source document · all NSTAR Electric Company tariffs