Green Mountain Power Corp
Investor Owned electric utility · Vermont · #131 of 3,199 U.S. utilities by customers · EIA utility #7601
Green Mountain Power Corp is a investor owned electric utility serving 276,986 customers in Vermont. In 2025 it sold 4,145 gigawatt-hours of electricity for $801.90M in revenue, an average realized rate of 19.35¢ per kWh across all customer classes and 23.29¢ per kWh for residential customers. Its reported service territory covers 13 counties. EIA records its activities as: generation, transmission, buying transmission, distribution, buying 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 | 227,727 | 1,642 | $382.31M | 23.29¢ | |
| Commercial | 49,185 | 1,490 | $303.60M | 20.38¢ | |
| Industrial | 74 | 1,013 | $115.99M | 11.45¢ | |
| Total | 276,986 | 4,145 | $801.90M | 19.35¢ |
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 (601 kWh/month).
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 270,677 | 4,101 | $670.86M | 19.58¢ |
| 2022 | 271,700 | 4,129 | $702.61M | 20.37¢ |
| 2023 | 273,285 | 4,033 | $700.36M | 21.02¢ |
| 2024 | 275,494 | 4,086 | $745.86M | 22.09¢ |
| 2025 | 276,986 | 4,145 | $801.90M | 23.29¢ |
Reliability (2025)
Average outage time (SAIDI): 265 minutes per customer per year
Average outages (SAIFI): 1.75 per customer
Average restoration time (CAIDI): 151 minutes
As reported for Vermont under the Other standard, with major event days included where the standard reports them. Lower is better; see the reliability rankings.
Energy supply (2025)
Net generation: 710 GWh
Wholesale power purchased: 4,218 GWh
Winter peak demand: 755 MW
Energy losses: 4.9% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 97.3% of 290,484 meters
Customer-sited generation (net metering): 7,053 installations, 142.3 MW of capacity
Counties served
Addison, VTBennington, VTCaledonia, VTChittenden, VTEssex, VTFranklin, VTLamoille, VTOrange, VTOrleans, VTRutland, VTWashington, VTWindham, VTWindsor, VT
Other large utilities in Vermont
- Vermont Electric Cooperative, Inc - 41,444 customers, residential 24.33¢
- City of Burlington Electric - (VT) - 22,018 customers, residential 19.80¢
- Washington Electric Coop - (VT) - 12,250 customers, residential —
- The Town of Lyndon Elec Dept - (VT) - 6,297 customers, residential —
- Town of Hardwick - 4,888 customers, residential —
- Village of Morrisville - (VT) - 4,798 customers, residential —
- Town of Stowe - (VT) - 4,659 customers, residential —
- Village of Swanton - (VT) - 3,871 customers, residential —
All Vermont utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #7601 in the EIA frame.