Residential
Groton Dept of Utilities · Flat · filed 2025
What this tariff charges
| Fixed charge | $26.50 per month |
|---|---|
| Structure | Flat |
| Filed | 2025-04-01 |
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 | 0.13596 | 0.00052 | 0.13648 |
What it costs at different usage levels
| kWh per month | Annual total | Effective $/kWh |
|---|---|---|
| 500 | $1,136.88 | $0.1895 |
| 1000 | $1,955.76 | $0.1630 |
| 2000 | $3,593.52 | $0.1497 |
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 $681 and $1,197 a year on this tariff, paying back in 18–31 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
Applicable to the entire electrical requirements in a single-family dwelling and appurtenances, or in an individual apartment, or in common use areas of apartment buildings or condominium buildings where residential usage exceeds 50% of monthly metered energy. The net metering rider is also applicable to any customer with approved self-generation. Purchased Power Adjustment: An adjustment will be applied to every kWh sold to reflect any difference between the base power costs included in rates and the actual power costs (not including transmission) billed to the Department for its load. TRANSMISSION COST ADJUSTMENT: An adjustment will be applied to every kWh sold to reflect any difference between the base transmission costs included in rates and the actual transmission costs charged to the Department.
URDB rate id 6877e4a0194097833107aeaa · utility source document · all Groton Dept of Utilities tariffs