Delmarva Power
Investor Owned electric utility · Delaware · #79 of 3,199 U.S. utilities by customers · EIA utility #5027
Delmarva Power is a investor owned electric utility serving 505,595 customers in Delaware, Maryland. In 2025 it sold 6,419 gigawatt-hours of electricity for $1.24B in revenue, an average realized rate of 19.31¢ per kWh across all customer classes and 19.69¢ per kWh for residential customers. Its reported service territory covers 13 counties. EIA records its activities as: transmission, buying transmission, distribution, wholesale marketing.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 460,632 | 5,121 | $1.01B | 19.69¢ | |
| Commercial | 44,893 | 1,277 | $229.08M | 17.93¢ | |
| Industrial | 70 | 21.3 | $2.30M | 10.79¢ | |
| Total | 505,595 | 6,419 | $1.24B | 19.31¢ |
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 (926 kWh/month).
Operations by state
| State | Customers | Sales (GWh) | Residential rate |
|---|---|---|---|
| Delaware | 305,344 | 3,838 | 18.16¢ |
| Maryland | 200,251 | 2,582 | 21.81¢ |
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 465,979 | 6,101 | $810.28M | 13.57¢ |
| 2022 | 479,240 | 6,749 | $959.31M | 14.41¢ |
| 2023 | 486,421 | 6,087 | $1.01B | 16.80¢ |
| 2024 | 491,153 | 6,166 | $1.12B | 18.43¢ |
| 2025 | 505,595 | 6,419 | $1.24B | 19.69¢ |
Reliability (2025)
Average outage time (SAIDI): 104 minutes per customer per year
Average outages (SAIFI): 0.78 per customer
Average restoration time (CAIDI): 133 minutes
As reported for Delaware 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: 7,126 GWh
Winter peak demand: 4,100 MW
Energy losses: 6.4% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 99.9% of 561,804 meters
Customer-sited generation (net metering): 22,771 installations, 299.7 MW of capacity
This utility also reported 54,628 delivery-only customers (5,606 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
Caroline, MDCecil, MDDorchester, MDHarford, MDKent, DEKent, MDNew Castle, DEQueen Annes, MDSomerset, MDSussex, DETalbot, MDWicomico, MDWorcester, MD
Other large utilities in Delaware
- Delaware Electric Cooperative - 122,301 customers, residential 13.89¢
- City of Dover - (DE) - 25,346 customers, residential 16.16¢
- City of Newark - (DE) - 13,486 customers, residential 19.75¢
- Town of Middletown - (DE) - 10,333 customers, residential 16.64¢
- City of Milford - (DE) - 9,096 customers, residential 15.86¢
- Town of Smyrna - (DE) - 6,546 customers, residential —
- City of Seaford- (DE) - 4,474 customers, residential —
- City of Lewes - (DE) - 4,087 customers, residential —
All Delaware utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #5027 in the EIA frame.