Connecticut · Municipal · serves 5 ZIP codes
Groton Dept of Utilities - (CT) rate plans
2 residential plans are currently open to new customers. None of them price by hour, so shifting when you use power won’t change your bill here.
What does Groton Dept of Utilities cost at a normal month’s usage?
A household using 1,000 kWh a month pays about $1,956 a year on the cheapest of the 2 plans we can price here — Residential — and $1,972 on the priciest. Same house, same wires.
| A month of | Cheapest, a year | On which plan | Priciest |
|---|---|---|---|
| 500 kWh | $1,137 | Residential | $1,148 |
| 1,000 kWh | $1,956 | Residential | $1,972 |
| 2,000 kWh | $3,595 | Residential | $3,621 |
The same plan is cheapest at every level of use here, so the answer does not turn on how much you use. Estimates from the filed tariff, priced hour by hour on a household with central air — not a quote.
How much does the plan you pick actually matter here?
Run the same three-bedroom house with central air through every plan Groton Dept of Utilities - (CT) files, and the bill lands anywhere between $1,608 and $1,622 a year. That $14 spread is not a difference in electricity — it is the same kilowatt-hours, from the same wires, priced under different rules. Nobody sends you a letter when you are on the wrong side of it.
None of these 2 plans price by the hour, so when you use electricity here makes no difference to what you pay — only how much. That narrows your options to two levers: use less, or pick the plan whose fixed charge and tier structure suit your size of household.
How Groton Dept of Utilities compares across Connecticut
Run the same three-bedroom house with central air through its default plan at each of the 3 Connecticut utilities we cover, and Groton Dept of Utilities is the cheapest of the lot at about $1,608 a year; the state median is $2,877. The dearest, United Illuminating, charges $3,322 for identical use — a gap set by the address, not by anything either household did.
The other two households tell the same story in different sizes: a small apartment pays about $982 here against a state median of $1,537, and the same house with an electric car charging overnight about $2,106 against $3,943. Effective rate, fixed charge included, is 17.0¢ per kilowatt-hour for the family home.
Inside Groton Dept of Utilities itself, the gap between its cheapest and dearest plan for that house is $14 a year — less than the $1,714 between Connecticut's cheapest and dearest utilities. Here the address decides most of the bill; the plan decides the rest.
Every Connecticut utility we cover, priced for the same three households →
Which plan would cost you least?
No bill upload, no sign-up. Tell us roughly what a month costs you and what runs on electricity — we price every plan against the same household and show you the gap.
That adds up to 9,984 kWh a year. Compare it to the total on your bill and adjust until it’s close.
Same usage, different plan
$14a year
That is the gap between the cheapest plan you could be on — Residential — and the priciest. Not by using less power. By being billed differently for the same power.
| Plan | Per year | Vs best |
|---|---|---|
| ResidentialOne rate, every hour of the year. | $1,680 | — |
| Residential, GRTOne rate, every hour of the year. | $1,694 | +$14 |
An estimate, not a quote. Supply charges move month to month, and your real usage pattern is not exactly this one. What it does show reliably is the gap between plans — both are priced off the same assumptions.
Making sense of the bill
- How to read your electric bill
Four kinds of charge, only two of which you can do anything about.
- Fixed charges on your electric bill: what they are and why they matter
The line that makes cents-per-kilowatt-hour comparisons quietly wrong.
- How to compare electricity plans without getting it wrong
Six things that break a comparison, and the order to check them in.
Every plan, in detail
Hour-by-hour schedules, tier thresholds, and the tariff each one comes from.