In short: Manassas has about 43,600 people and sits in Manassas County. Virginia Electric & Power Co and City of Manassas serves different parts of Manassas County, so your utility depends on your address; their 2024 home averages range from 11.63¢ to 14.09¢ per kWh (EIA). Rooftop solar here makes roughly 1,200 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 Manassas: its utility, outage records, sunshine, weather risks and charging. Statewide rules such as net metering, incentives and electrician licensing are in our Virginia energy guide.
Manassas at a glance
- Place: Manassas, Manassas County, Virginia; about 43,616 residents (Census Bureau estimate, July 2024).
- Utility: Virginia Electric & Power Co (investor-owned). Homes paid an average 14.09¢ per kWh in 2024 (EIA-861); the average customer lost 131 minutes of power on normal days and 172 counting major storms, with 1.2 interruptions a year (utility-wide, not just Manassas).
- Utility: City of Manassas (city-owned). Homes paid an average 11.63¢ per kWh in 2024 (EIA-861); the average customer lost 28 minutes of power on normal days and 56 counting major storms, with 0.6 interruptions a year (utility-wide, not just Manassas).
- Sun: 4.12 kWh per square meter per day on average, from 1.91 in December to 6.20 in June (NASA POWER). Our rough estimate: about 1,200 kWh a year per kW of panels.
- Climate: about 1,460 cooling degree-days and 4,470 heating degree-days a year (base 65°F, NASA POWER), so heating and cooling both matter.
- Top hazards in Manassas County: hurricanes “relatively low”, heat waves “relatively low” and lightning “relatively low” (FEMA National Risk Index; overall county risk rated “very low”).
- Public charging: 44 ports at 17 locations in Manassas, 17 of them DC fast (AFDC, October 20, 2026).
Your utility and what it means
Virginia Electric & Power Co is an investor-owned utility and served about 2,383,548 home customers in 2024; its 14.09¢ average was below the 17.55¢ statewide average for July 2026. City of Manassas is a city-owned utility and served about 13,947 home customers in 2024; its 11.63¢ average was below the 17.55¢ 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, Virginia Electric & Power Co reported 131 minutes per customer without major storms in 2024, less than the statewide figure of 166 (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 Virginia guide and then ask your utility for its current interconnection steps before you sign anything.
Backup power in Manassas
- Hurricanes (relatively low): Hurricanes can mean a week without power. A standby generator on natural gas or propane, or a battery with solar, beats a stack of gas cans; check flood height before you site equipment.
- Heat waves (relatively low): Heat waves strain the grid just when air conditioning matters most. Decide what must stay cool, such as one room, medicine and the fridge, and size backup to that rather than the whole house.
- 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 Manassas
By our rough estimate each kW of panels makes about 1,200 kWh a year in Manassas (NASA sunshine data times 365 days times 0.80 for system losses). Valued at Virginia Electric & Power Co’s 2024 average of 14.09¢, that is about $169 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 6.20 and December the dimmest at 1.91, a 3.2-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. Manassas has 44 public charging ports in the federal station list including 17 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 Manassas: 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 Manassas building or permitting department, or from Manassas County if you live outside city limits, and often a utility interconnection approval. We have not verified a local permit page for Manassas, so check the city and county websites or ask your electrician, who will know the process. Hire only a licensed electrician or installer; the Virginia guide lists the state licensing rules.
Nearby guides
More local guides: Fairfax, Alexandria, Leesburg and Fredericksburg, or the whole Virginia energy guide.
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Manassas energy FAQ
Who is my electric company in Manassas?
Virginia Electric & Power Co and City of Manassas both serve parts of Manassas County. Which one serves you depends on your street, so check the top of your bill. Their 2024 home price averages differ (Virginia Electric & Power Co 14.09¢, City of Manassas 11.63¢) so it matters for solar math.
How much power will solar make in Manassas?
About 1,200 kWh a year per kW of panels by our estimate, so a 6 kW system would make roughly 7,200 kWh. Shade, roof direction and tilt change this; run your address through the solar potential tool for a better number.
Do I need a permit for solar or a generator in Manassas?
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.