In short: Seaford has about 9,000 people and sits in Sussex County. Delmarva Power, Delaware Electric Cooperative and City of Milford serves different parts of Sussex County, so your utility depends on your address; their 2024 home averages range from 14.22¢ to 17.23¢ per kWh (EIA). FEMA rates Sussex County coastal flooding “very high”. Rooftop solar here makes roughly 1,230 kWh a year per kW of panels by our estimate, which is about average for the U.S..
This page covers what is local to Seaford: its utility, outage records, sunshine, weather risks and charging. Statewide rules such as net metering, incentives and electrician licensing are in our Delaware energy guide and the wider area is covered in the Dover, DE guide.
Seaford at a glance
- Place: Seaford, Sussex County, Delaware; about 8,952 residents (Census Bureau estimate, July 2024).
- Utility: Delmarva Power (investor-owned). Homes paid an average 17.23¢ per kWh in 2024 (EIA-861); the average customer lost 68 minutes of power on normal days and 127 counting major storms, with 0.7 interruptions a year (utility-wide, not just Seaford).
- Utility: Delaware Electric Cooperative (member-owned cooperative). Homes paid an average 14.22¢ per kWh in 2024 (EIA-861); the average customer lost 61 minutes of power on normal days and 96 counting major storms, with 0.9 interruptions a year (utility-wide, not just Seaford).
- Utility: City of Milford (city-owned). Homes paid an average 15.17¢ per kWh in 2024 (EIA-861); the average customer lost 20 minutes of power on normal days, with 0.2 interruptions a year (utility-wide, not just Seaford).
- Sun: 4.20 kWh per square meter per day on average, from 1.91 in December to 6.34 in June (NASA POWER). Our rough estimate: about 1,230 kWh a year per kW of panels.
- Climate: about 1,450 cooling degree-days and 4,250 heating degree-days a year (base 65°F, NASA POWER), so heating and cooling both matter.
- Top hazards in Sussex County: coastal flooding “very high”, winter weather “very high” and cold waves “relatively high” (FEMA National Risk Index; overall county risk rated “relatively moderate”).
- Public charging: 14 ports at 4 locations in Seaford, 8 of them DC fast (AFDC, October 20, 2026).
Your utility and what it means
Delmarva Power is an investor-owned utility and served about 275,018 home customers in 2024; its 17.23¢ average was below the 18.48¢ statewide average for July 2026. Delaware Electric Cooperative is a member-owned cooperative utility and served about 104,839 home customers in 2024; its 14.22¢ average was below the 18.48¢ statewide average for July 2026. City of Milford is a city-owned utility and served about 7,169 home customers in 2024; its 15.17¢ average was below the 18.48¢ statewide average for July 2026. Those are utility-wide averages, not a quote for your address; your own bill is the real number.
For reliability, Delmarva Power reported 68 minutes per customer without major storms in 2024, more than the statewide figure of 66 (EIA-861). Utility-wide numbers hide a lot: a home at the end of a long rural line usually has more outages than the average.
Net metering, export rates and incentives are set at state level and by each utility. Start with the Delaware guide and then ask your utility for its current interconnection steps before you sign anything.
Backup power in Seaford
- Coastal flooding (very high): Coastal flooding means keeping batteries, generators and electrical panels above flood level; ask a licensed electrician about elevating equipment.
- Winter weather (very high): Winter storms and cold snaps combine outages with heating demand. Plan for the furnace blower or heat pump, not just lights, and keep a fuel supply you can reach in snow.
- Short outages: a portable power station covers phones, Wi-Fi, a CPAP and lights; a home battery switches over automatically.
Size your setup with the generator sizing tool and the battery backup calculator, and compare options in backup power. Generator safety (CPSC): outdoors only, at least 20 feet from the house, exhaust away from doors and windows, never in a garage, and battery-powered carbon monoxide alarms inside. A licensed electrician should install any transfer switch, with a permit; see generator installation.
Solar in Seaford
By our rough estimate each kW of panels makes about 1,230 kWh a year in Seaford (NASA sunshine data times 365 days times 0.80 for system losses). Valued at Delmarva Power’s 2024 average of 17.23¢, that is about $212 a year per kW if all of it offsets your own use (an estimate, not a promise). Production swings with the seasons: June is the sunniest month at 6.34 and December the dimmest at 1.91, a 3.3-to-1 gap, so a battery or a bigger system helps in winter.
Check your own roof with the solar potential tool, see solar costs and net metering vs net billing, and read the steps in solar installation.
Batteries and EV charging
A home battery earns its place when outages are frequent, when your utility pays little for exported solar, or when evening prices are high; compare in home batteries and battery costs. Seaford has 14 public charging ports in the federal station list including 8 DC fast, but home charging is cheaper and easier: see the EV charging cost calculator and EV charger installation.
Drive on another fuel? See every alternative fuel station in Seaford: hydrogen, propane, natural gas, E85 ethanol, biodiesel and renewable diesel.
Permits and inspections
Solar, generator transfer switches and EV chargers normally need an electrical permit from the Seaford building or permitting department, or from Sussex County if you live outside city limits, and often a utility interconnection approval. We have not verified a local permit page for Seaford, so check the city and county websites or ask your electrician, who will know the process. Hire only a licensed electrician or installer; the Delaware guide lists the state licensing rules.
Nearby guides
More local guides: Dover, DE energy guide, Georgetown, Millsboro, Milford and Clayton, or the whole Delaware energy guide.
Get help
Are you a licensed installer in Seaford? Join SolutionEnergy and get requests from homeowners and businesses →
Tell us about your project and we will connect you with a licensed, independent installer who serves the Seaford area. It is free, there is no obligation, and only the installer you choose gets your details. Read how it works.
Seaford energy FAQ
Who is my electric company in Seaford?
Delmarva Power, Delaware Electric Cooperative and City of Milford all serve parts of Sussex County. Which one serves you depends on your street, so check the top of your bill. Their 2024 home price averages differ (Delmarva Power 17.23¢, Delaware Electric Cooperative 14.22¢, City of Milford 15.17¢) so it matters for solar math.
How much power will solar make in Seaford?
About 1,230 kWh a year per kW of panels by our estimate, so a 6 kW system would make roughly 7,380 kWh. Shade, roof direction and tilt change this; run your address through the solar potential tool for a better number.
Is a generator or a battery better for coastal flooding in Sussex County?
It depends how long the outage lasts. A battery is quiet, automatic and good for short outages and for pairing with solar; a standby generator keeps going as long as it has fuel, which suits multi-day events. Many homes use a battery for everyday outages and add a generator for the rare long one.
Do I need a permit for solar or a generator in Seaford?
Almost always an electrical permit for a transfer switch, solar or an EV charger, issued by the city or county where you live. Your licensed electrician or installer normally pulls it. Never connect a generator to your house wiring without a transfer switch.
Sources: EIA Form 861 (2024) for utility prices and outages; NASA POWER climatology (2001 to 2025) for sun and degree-days; FEMA National Risk Index for county hazards; AFDC station locator for public charging; Census Bureau for population. Estimates are ours and are not promises; see our editorial policy. Prices and programs change, so check each program page.