Connecticut Light & Power Co
Investor Owned electric utility · Connecticut · #36 of 3,199 U.S. utilities by customers · EIA utility #4176
Connecticut Light & Power Co is a investor owned electric utility serving 1,072,114 customers in Connecticut. In 2025 it sold 10,208 gigawatt-hours of electricity for $2.81B in revenue, an average realized rate of 27.49¢ per kWh across all customer classes and 28.88¢ per kWh for residential customers. Its reported service territory covers 8 counties. EIA records its activities as: transmission, buying transmission, distribution, wholesale marketing, retail marketing.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 995,130 | 8,079 | $2.33B | 28.88¢ | |
| Commercial | 75,368 | 1,927 | $441.69M | 22.92¢ | |
| Industrial | 1,616 | 202 | $31.57M | 15.61¢ | |
| Total | 1,072,114 | 10,208 | $2.81B | 27.49¢ |
Average realized rate = revenue divided by sales as reported on EIA Form 861. It blends fixed charges, demand charges and riders into one per-kWh figure; it is not the utility's tariff rate. Estimated residential bill assumes the average residential customer's actual 2025 usage (677 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 1,043,237 | 10,379 | $2.10B | 21.30¢ |
| 2022 | 1,117,900 | 11,696 | $2.84B | 25.48¢ |
| 2023 | 1,012,596 | 9,479 | $2.90B | 31.63¢ |
| 2024 | 998,217 | 9,211 | $2.51B | 28.51¢ |
| 2025 | 1,072,114 | 10,208 | $2.81B | 28.88¢ |
Reliability (2025)
Average outage time (SAIDI): 217 minutes per customer per year
Average outages (SAIFI): 1.00 per customer
Average restoration time (CAIDI): 216 minutes
As reported for Connecticut under the IEEE standard, with major event days included where the standard reports them. Lower is better; see the reliability rankings.
Energy supply (2025)
Net generation: — GWh
Wholesale power purchased: 20,055 GWh
Winter peak demand: 3,607 MW
Energy losses: 2.1% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 0.0% of 1,346,490 meters
Customer-sited generation (net metering): 94,340 installations, 1,232.5 MW of capacity
This utility also reported 237,832 delivery-only customers (10,143 GWh delivered) in 2025. Delivery figures are excluded from the totals above because the same electricity is also reported by the energy supplier - see Methodology.
Counties served
Fairfield, CTHartford, CTLitchfield, CTMiddlesex, CTNew Haven, CTNew London, CTTolland, CTWindham, CT
Other large utilities in Connecticut
- United Illuminating Co - 277,914 customers, residential 35.40¢
- Think Energy, LLC - 90,425 customers, residential 11.78¢
- Town Square Energy - 85,979 customers, residential 13.09¢
- Town of Wallingford - (CT) - 25,123 customers, residential 17.78¢
- City of Norwich - (CT) - 20,996 customers, residential 23.35¢
- Groton Dept of Utilities - (CT) - 14,193 customers, residential 18.05¢
- XOOM Energy Connecticut, LLC - 10,627 customers, residential 13.09¢
- City of South Norwalk - (CT) - 7,439 customers, residential —
All Connecticut utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #4176 in the EIA frame.