Residential tariff · MA
Western Massachusetts Residential Space Heating Low Income Rate R-4
NSTAR Electric Company · Flat · filed 2022
What this tariff charges
| Fixed charge | $7.00 per month |
|---|---|
| Structure | Flat |
| Filed | 2022-08-31 |
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 | 0.10968 | 0.00000 | 0.10968 |
What it costs at different usage levels
| kWh per month | Annual total | Effective $/kWh |
|---|---|---|
| 500 | $742.08 | $0.1237 |
| 1000 | $1,400.16 | $0.1167 |
| 2000 | $2,716.32 | $0.1132 |
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 $551 and $1,000 a year on this tariff, paying back in 21–38 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 applicable to low-income residential customers based upon verification of a Customer's receipt of any means-tested public-benefit program or verification of eligibility for the low-income home energy assistance program (LIHEAP) or its successor program, for which eligibility does not exceed 60% of the state median income or other criteria approved by the Department.
URDB rate id 638a3bf950300148fd0521fa · utility source document · all NSTAR Electric Company tariffs