Residential tariff · MA
Cambridge Electric Light Company Residential Space Heating R-3 (04)
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 | 0.09049 | 0.00000 | 0.09049 |
What it costs at different usage levels
| kWh per month | Annual total | Effective $/kWh |
|---|---|---|
| 500 | $632.94 | $0.1055 |
| 1000 | $1,175.88 | $0.0980 |
| 2000 | $2,261.76 | $0.0942 |
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 $454 and $825 a year on this tariff, paying back in 25–46 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 all domestic uses in a single private dwelling, in an individual apartment or in a residential condominium in which the principal means of heating the premises is provided by permanently installed electric space heating equipment. Service under this rate to residential condominiums is available to the extent permitted by applicable regulations of the Massachusetts Department of Telecommunications and Energy.
URDB rate id 698916d12c26800bea08a55c · utility source document · all NSTAR Electric Company tariffs