States › Delaware › Delmarva Power
investor-owned utility · EIA utility 5027
Delmarva Power
Average price is revenue divided by sales for the sector and year; it is not a tariff rate. Reliability figures are as reported by utilities to EIA on Form 861 and may use different calculation methods. Annual figures: Form EIA-861 for 2024, final release. Monthly state figures run to July 2026.
In its Form EIA-861 filing for 2024, Delmarva Power, an investor-owned utility, reported 488,318 residential customers in Delaware and 1 other state, with a service territory that touches 13 counties.
Its average residential price that year was 18.43¢ per kilowatthour, 11% above the Delaware average of 16.57¢ and 12% above the US average of 16.48¢. The figure is residential revenue divided by residential sales, so it folds in fixed charges, riders and every rate schedule the utility bills under.
That works out to an average residential bill of $167.08 a month on average use of 907 kWh a month. Across Delaware the average bill was $150.87 on 911 kWh, so a bill gap reflects how much power households use as well as what each kilowatthour costs.
The price covers the 447,026 residential customers on bundled service. A further 41,292 take delivery only and buy their energy from another supplier; EIA collects just part of their bill from this respondent, so they are left out of the average.
For reliability it reported a SAIDI of 108.4 minutes per customer with major event days included and 63.3 minutes with them excluded, calculated under IEEE 1366 standard. The median among Delaware utilities reporting was 90.1 minutes with major event days; this utility's figure is 20% above that median.
The average price is up 40.2% on 2019, against up 32.0% for Delaware as a whole, and up 9.7% on 2023.
Compared with Delaware, the US and other investor-owned utilities
| Measure, 2024 | This utility | Investor-owned utilities, US median | Delaware | United States |
|---|---|---|---|---|
| Average residential price per kWh | 18.43¢ | 16.17¢ | 16.57¢ | 16.48¢ |
| Average monthly residential bill | $167.08 | $131.47 | $150.87 | $142.26 |
| Average monthly use, kWh | 907 | 787 | 911 | 863 |
| Residential price change, 1 year | +9.7% | — | +5.3% | +3.0% |
| Residential price change, 5 years | +40.2% | — | +32.0% | +26.7% |
| SAIDI, all events (minutes) | 108.4 | 278.7 | 90.1 median | 184.5 median |
| SAIDI, without major event days | 63.3 | 106.5 | 64.7 median | 99.8 median |
State and US prices, bills and use are EIA's own averages over every customer. The ownership column and the reliability columns are medians across utilities with at least 1,000 residential customers, computed on this site from the final 2024 file. In Delaware this utility's price ranks 2 of 6, counting from the highest.
Average price by year
Delmarva PowerDelaware averageUS average
Year by year
| Year | ¢ per kWh | Delaware ¢ | Monthly bill | kWh a month | Residential customers | All sales |
|---|---|---|---|---|---|---|
| 2024 | 18.43¢ | 16.57¢ | $167.08 | 907 | 488,318 | 11.8 TWh |
| 2023 | 16.80¢ | 15.73¢ | $146.69 | 873 | 483,950 | 11.5 TWh |
| 2022 | 14.41¢ | 13.71¢ | $136.49 | 947 | 479,552 | 12.1 TWh |
| 2021 | 13.57¢ | 12.52¢ | $128.67 | 948 | 475,021 | 12 TWh |
| 2020 | 13.22¢ | 12.56¢ | $122.27 | 925 | 470,747 | 11.7 TWh |
| 2019 | 13.15¢ | 12.55¢ | $123.45 | 938 | 465,980 | 12.1 TWh |
| 2018 | 13.39¢ | 12.53¢ | $129.50 | 967 | 462,040 | 12.5 TWh |
| 2017 | 14.07¢ | 13.35¢ | $126.46 | 899 | 458,170 | 11.9 TWh |
| 2016 | 14.16¢ | 13.42¢ | $132.31 | 934 | 454,703 | 12.1 TWh |
| 2015 | 14.14¢ | 13.42¢ | $137.43 | 972 | 450,247 | 12.5 TWh |
| 2014 | 13.98¢ | 13.29¢ | $132.20 | 946 | 446,918 | 12.4 TWh |
| 2013 | 13.63¢ | 12.95¢ | $127.98 | 939 | 443,846 | 12.5 TWh |
Bundled residential service only in the price, bill and use columns. Bill = residential revenue ÷ customers ÷ 12; use = residential sales ÷ customers ÷ 12.
Month by month
Delmarva Power (DE)Delaware average
Sales by sector, 2024
| Sector | Customers | Sales | Share of sales | Revenue | ¢ per kWh, bundled |
|---|---|---|---|---|---|
| Residential | 488,318 | 5.3 TWh | 45% | $931,087,100 | 18.43¢ |
| Commercial | 66,138 | 5.2 TWh | 44% | $368,967,600 | 17.59¢ |
| Industrial | 243 | 1.3 TWh | 11% | $21,758,100 | 11.94¢ |
Customers, sales and revenue count every service type the utility reported (bundled, energy-only and delivery-only). The price column uses bundled service alone, because part-bill revenue would understate it. Sources of energy: 7.3 TWh in total, of which 0% was its own net generation and 7.3 TWh was bought wholesale; summer peak demand 4,130 MW.
By state
| State | Residential customers | ¢ per kWh | State average ¢ | Monthly bill | SAIDI, all events |
|---|---|---|---|---|---|
| Delaware | 301,950 | 17.23¢ | 16.57¢ | $152.26 | 127.0 |
| Maryland | 186,368 | 20.22¢ | 17.86¢ | $190.78 | 79.0 |
Reliability
Minutes of sustained interruption per customer in 2024, as the utility reported them under IEEE 1366 standard. SAIFI: 0.74 interruptions per customer with major event days, 0.62 without; CAIDI 147.4 minutes per interruption. EIA's Delaware total across all reporting utilities was 116.1 minutes with major event days and 65.9 without. Major event days are storms and similar events that a utility's chosen method sets apart; methods differ, so treat comparisons as approximate. What SAIDI and SAIFI mean.
| Year | SAIDI, all events | SAIDI, no major events | SAIFI, all events | SAIFI, no major events | Method |
|---|---|---|---|---|---|
| 2024 | 108.4 | 63.3 | 0.74 | 0.62 | IEEE 1366 |
| 2023 | 125.1 | 58.4 | 0.75 | 0.60 | IEEE 1366 |
| 2022 | 103.7 | 66.9 | 0.78 | 0.71 | IEEE 1366 |
| 2021 | 62.6 | 62.6 | 0.82 | 0.82 | IEEE 1366 |
| 2020 | 235.3 | 73.5 | 1.09 | 0.79 | IEEE 1366 |
| 2019 | 104.8 | 74.3 | 0.93 | 0.79 | IEEE 1366 |
| 2018 | 160.7 | 83.0 | 1.07 | 0.87 | IEEE 1366 |
| 2017 | 186.3 | 84.6 | 1.15 | 0.95 | IEEE 1366 |
| 2016 | 142.5 | 98.2 | 1.24 | 1.03 | IEEE 1366 |
| 2015 | 208.6 | 115.2 | 1.43 | 1.22 | IEEE 1366 |
| 2014 | 164.8 | 113.8 | 1.48 | 1.31 | IEEE 1366 |
| 2013 | 182.9 | 164.3 | 1.58 | 1.29 | IEEE 1366 |
Counties in its service territory
- Kent County DE
- New Castle County DE
- Sussex County DE
- Caroline County MD
- Cecil County MD
- Dorchester County MD
- Harford County MD
- Kent County MD
- Queen Anne's County MD
- Somerset County MD
- Talbot County MD
- Wicomico County MD
- Worcester County MD
Counties the utility listed on Form EIA-861 for 2024. Listing a county does not mean the utility serves all of it.
Other utilities in Delaware
| Utility | Ownership | Residential customers | ¢ per kWh | Monthly bill | SAIDI, all events | SAIDI, no major events |
|---|---|---|---|---|---|---|
| Delaware Electric Cooperative | Cooperative | 104,839 | 14.22¢ | $146.66 | 95.7 | 61.3 |
| City of Dover | Municipal | 21,601 | 15.52¢ | $126.36 | — | — |
| City of Newark | Municipal | 11,888 | 18.99¢ | $131.52 | 84.4 | 84.4 |
| Town of Middletown | Municipal | 9,071 | 17.12¢ | $158.26 | — | — |
| City of Milford | Municipal | 7,169 | 15.17¢ | $140.99 | 20.0 | 20.0 |
All Delaware utilities · Investor-owned utilities nationwide
Questions and answers
How much does electricity cost from Delmarva Power?
Residential customers paid an average of 18.43¢ per kilowatthour in 2024. EIA derives this by dividing residential revenue by residential sales; it is an average across all rate schedules and charges, not a tariff rate.
How does that compare with Delaware?
The Delaware average residential price in 2024 was 16.57¢ and the US average 16.48¢; Delmarva Power was 11% above the state figure. Among 6 utility filings with a bundled residential price in Delaware, it had the 2nd highest.
What is the average Delmarva Power bill?
$167.08 a month in 2024, on average residential use of 907 kWh a month (annual revenue and sales divided by customers and by twelve). The Delaware average was $150.87 on 911 kWh.
How reliable is Delmarva Power service?
It reported 108.4 minutes of interruption per customer (SAIDI) including major event days and 63.3 minutes excluding them, with 0.74 interruptions per customer (SAIFI) in 2024. Utilities calculate these under differing methods, so comparisons are approximate.
Is the Delmarva Power price rising?
The average residential price was up 9.7% in 2024 compared with 2023 and up 40.2% compared with 2019.
Which counties does Delmarva Power serve?
Its Form EIA-861 service territory lists 13 counties, including Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Cecil County, MD and Dorchester County, MD. A county can appear in several utilities' territories.
Provenance
Source: U.S. Energy Information Administration. Annual figures are from Form EIA-861 (sales to ultimate customers, reliability, operational data and service territory files), final release for 2024, respondent "Delmarva Power", utility number 5027. Monthly utility figures are from the Form EIA-861M sample. State and US averages are from the Form EIA-861M sales and revenue workbook, published through July 2026. All are US government works in the public domain. Page built 30 Sep 2026. Errors in processing are corrected at the next build; see corrections. For tariffs and rate schedules, consult the utility or the state utility commission.