In short: Bethesda is in Montgomery County. Baltimore Gas & Electric Co, Potomac Electric Power Co and The Potomac Edison Company serves different parts of Montgomery County, so your utility depends on your address; their 2024 home averages range from 13.83¢ to 20.08¢ per kWh (EIA). FEMA rates Montgomery County winter weather “very high”. 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 Bethesda: its utility, outage records, sunshine, weather risks and charging. Statewide rules such as net metering, incentives and electrician licensing are in our Maryland energy guide and the wider area is covered in the Frederick guide.
Bethesda at a glance
- Place: Bethesda, Montgomery County, Maryland.
- Utility: Baltimore Gas & Electric Co (investor-owned). Homes paid an average 17.91¢ per kWh in 2024 (EIA-861); the average customer lost 67 minutes of power on normal days and 133 counting major storms, with 0.6 interruptions a year (utility-wide, not just Bethesda).
- Utility: Potomac Electric Power Co (investor-owned). Homes paid an average 20.08¢ per kWh in 2024 (EIA-861); the average customer lost 46 minutes of power on normal days and 65 counting major storms, with 0.5 interruptions a year (utility-wide, not just Bethesda).
- Utility: The Potomac Edison Company (investor-owned). Homes paid an average 13.83¢ per kWh in 2024 (EIA-861); the average customer lost 159 minutes of power on normal days, with 1.1 interruptions a year (utility-wide, not just Bethesda).
- 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 1,350 cooling degree-days and 4,650 heating degree-days a year (base 65°F, NASA POWER), so heating and cooling both matter.
- Top hazards in Montgomery County: winter weather “very high”, heat waves “relatively high” and strong winds “relatively high” (FEMA National Risk Index; overall county risk rated “relatively moderate”).
- Public charging: 220 ports at 75 locations in Bethesda, 33 of them DC fast (AFDC, October 20, 2026).
Your utility and what it means
Baltimore Gas & Electric Co is an investor-owned utility and served about 1,025,745 home customers in 2024; its 17.91¢ average was below the 21.41¢ statewide average for July 2026. Potomac Electric Power Co is an investor-owned utility and served about 485,483 home customers in 2024; its 20.08¢ average was below the 21.41¢ statewide average for July 2026. The Potomac Edison Company is an investor-owned utility and served about 240,570 home customers in 2024; its 13.83¢ average was below the 21.41¢ 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, The Potomac Edison Company reported 159 minutes per customer without major storms in 2024, more than the statewide figure of 75 (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 Maryland guide and then ask your utility for its current interconnection steps before you sign anything.
Backup power in Bethesda
- 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.
- Heat waves (relatively high): 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 Bethesda
By our rough estimate each kW of panels makes about 1,200 kWh a year in Bethesda (NASA sunshine data times 365 days times 0.80 for system losses). Valued at Baltimore Gas & Electric Co’s 2024 average of 17.91¢, that is about $215 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. Hail and storm exposure are worth raising with installers and your insurer.
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. Bethesda has 220 public charging ports in the federal station list including 33 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 Bethesda: 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 Bethesda building or permitting department, or from Montgomery County if you live outside city limits, and often a utility interconnection approval. We have not verified a local permit page for Bethesda, so check the city and county websites or ask your electrician, who will know the process. Hire only a licensed electrician or installer; the Maryland guide lists the state licensing rules.
Nearby guides
More local guides: Frederick energy guide, Silver Spring, Takoma Park, Rockville and Hyattsville, or the whole Maryland energy guide.
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Bethesda energy FAQ
Who is my electric company in Bethesda?
Baltimore Gas & Electric Co, Potomac Electric Power Co and The Potomac Edison Company all serve parts of Montgomery County. Which one serves you depends on your street, so check the top of your bill. Their 2024 home price averages differ (Baltimore Gas & Electric Co 17.91¢, Potomac Electric Power Co 20.08¢, The Potomac Edison Company 13.83¢) so it matters for solar math.
How much power will solar make in Bethesda?
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.
Is a generator or a battery better for winter weather in Montgomery 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 Bethesda?
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.