In short: Montpelier has about 7,900 people and sits in Washington County. Green Mountain Power Corp serves the county, averaging 22.09¢ per kWh for homes in 2024 (EIA). Rooftop solar here makes roughly 1,010 kWh a year per kW of panels by our estimate, which is on the modest side, so price and incentives matter more.
This page covers what is local to Montpelier: its utility, outage records, sunshine, weather risks and charging. Statewide rules such as net metering, incentives and electrician licensing are in our Vermont energy guide and the wider area is covered in the Burlington, VT guide.
Montpelier at a glance
- Place: Montpelier, Washington County, Vermont; about 7,915 residents (Census Bureau estimate, July 2024).
- Utility: Green Mountain Power Corp (investor-owned). Homes paid an average 22.09¢ per kWh in 2024 (EIA-861); the average customer lost 281 minutes of power on normal days and 667 counting major storms, with 1.7 interruptions a year (utility-wide, not just Montpelier).
- Sun: 3.47 kWh per square meter per day on average, from 1.06 in December to 5.66 in July (NASA POWER). Our rough estimate: about 1,010 kWh a year per kW of panels.
- Climate: about 190 cooling degree-days and 8,790 heating degree-days a year (base 65°F, NASA POWER), so heating is the big load.
- Top hazards in Washington County: landslides “relatively moderate”, winter weather “relatively moderate” and lightning “relatively moderate” (FEMA National Risk Index; overall county risk rated “relatively low”).
- Public charging: 39 ports at 20 locations in Montpelier, 8 of them DC fast (AFDC, October 20, 2026).
Your utility and what it means
Green Mountain Power Corp is an investor-owned utility and served about 226,675 home customers in 2024; its 22.09¢ average was below the 23.75¢ 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, Green Mountain Power Corp reported 281 minutes per customer without major storms in 2024, more than the statewide figure of 275 (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 Vermont guide and then ask your utility for its current interconnection steps before you sign anything.
Backup power in Montpelier
- Winter weather (relatively moderate): 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.
- Heating load: a winter outage can stop a furnace blower, boiler pump or heat pump. List what your heat needs to run before choosing a generator or battery.
- 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 Montpelier
By our rough estimate each kW of panels makes about 1,010 kWh a year in Montpelier (NASA sunshine data times 365 days times 0.80 for system losses). Valued at Green Mountain Power Corp’s 2024 average of 22.09¢, that is about $223 a year per kW if all of it offsets your own use (an estimate, not a promise). Production swings with the seasons: July is the sunniest month at 5.66 and December the dimmest at 1.06, a 5.4-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. Montpelier has 39 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 Montpelier: 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 Montpelier building or permitting department, or from Washington County if you live outside city limits, and often a utility interconnection approval. We have not verified a local permit page for Montpelier, so check the city and county websites or ask your electrician, who will know the process. Hire only a licensed electrician or installer; the Vermont guide lists the state licensing rules.
Nearby guides
More local guides: Burlington, VT energy guide, Barre, Essex Junction, South Burlington and Winooski, or the whole Vermont energy guide.
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Montpelier energy FAQ
Who is my electric company in Montpelier?
Federal data lists Green Mountain Power Corp as the main utility serving Washington County. Small areas can be served by a different company or a co-op, so confirm on your bill.
How much power will solar make in Montpelier?
About 1,010 kWh a year per kW of panels by our estimate, so a 6 kW system would make roughly 6,060 kWh. Shade, roof direction and tilt change this; run your address through the solar potential tool for a better number.
Will a home battery keep my heat on in an outage?
It can keep a furnace blower, boiler pump or a heat pump running for a while, but long cold outages drain a battery fast without solar to recharge it. Pair it with a generator or wood or propane heat if outages here run for days.
Do I need a permit for solar or a generator in Montpelier?
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.