In short: Hamilton has about 64,000 people and sits in Butler County. Duke Energy Ohio Inc, Dayton Power & Light Co and City of Hamilton serves different parts of Butler County, so your utility depends on your address; their 2024 home averages range from 15.0¢ to 15.44¢ per kWh (EIA). FEMA rates Butler County tornadoes “relatively high”. Rooftop solar here makes roughly 1,160 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 Hamilton: its utility, outage records, sunshine, weather risks and charging. Statewide rules such as net metering, incentives and electrician licensing are in our Ohio energy guide and the wider area is covered in the Cincinnati guide.
Hamilton at a glance
- Place: Hamilton, Butler County, Ohio; about 63,953 residents (Census Bureau estimate, July 2024).
- Utility: Duke Energy Ohio Inc (investor-owned). Homes paid an average 15.0¢ per kWh in 2024 (EIA-861); the average customer lost 103 minutes of power on normal days and 321 counting major storms, with 0.8 interruptions a year (utility-wide, not just Hamilton).
- Utility: Dayton Power & Light Co (investor-owned). Homes paid an average 15.32¢ per kWh in 2024 (EIA-861); the average customer lost 106 minutes of power on normal days and 503 counting major storms, with 0.9 interruptions a year (utility-wide, not just Hamilton).
- Utility: City of Hamilton (city-owned). Homes paid an average 15.44¢ per kWh in 2024 (EIA-861); the average customer lost 90 minutes of power on normal days, with 1.7 interruptions a year (utility-wide, not just Hamilton).
- Sun: 3.99 kWh per square meter per day on average, from 1.54 in December to 6.20 in June (NASA POWER). Our rough estimate: about 1,160 kWh a year per kW of panels.
- Climate: about 1,030 cooling degree-days and 5,380 heating degree-days a year (base 65°F, NASA POWER), so heating and cooling both matter.
- Top hazards in Butler County: tornadoes “relatively high”, cold waves “relatively high” and lightning “relatively high” (FEMA National Risk Index; overall county risk rated “relatively moderate”).
- Public charging: 39 ports at 16 locations in Hamilton, 7 of them DC fast (AFDC, October 20, 2026).
Your utility and what it means
Duke Energy Ohio Inc is an investor-owned utility and served about 294,084 home customers in 2024; its 15.0¢ average was below the 19.45¢ statewide average for July 2026. Dayton Power & Light Co is an investor-owned utility and served about 132,522 home customers in 2024; its 15.32¢ average was below the 19.45¢ statewide average for July 2026. City of Hamilton is a city-owned utility and served about 26,964 home customers in 2024; its 15.44¢ average was below the 19.45¢ 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, Dayton Power & Light Co reported 106 minutes per customer without major storms in 2024, less than the statewide figure of 133 (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 Ohio guide and then ask your utility for its current interconnection steps before you sign anything.
Backup power in Hamilton
- Tornadoes (relatively high): Tornado-season storms cut power quickly. A battery that switches on by itself, or a portable generator ready to go, covers the first night; sirens and weather radios need power too.
- Cold waves (relatively high): Cold waves raise demand and can cause both outages and frozen pipes. Keep at least one room warm with a battery-run heater circuit or a generator.
- 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 Hamilton
By our rough estimate each kW of panels makes about 1,160 kWh a year in Hamilton (NASA sunshine data times 365 days times 0.80 for system losses). Valued at Duke Energy Ohio Inc’s 2024 average of 15.0¢, that is about $174 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 1.54, a 4.0-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. Hamilton has 39 public charging ports in the federal station list including 7 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 Hamilton: 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 Hamilton building or permitting department, or from Butler County if you live outside city limits, and often a utility interconnection approval. We have not verified a local permit page for Hamilton, so check the city and county websites or ask your electrician, who will know the process. Hire only a licensed electrician or installer; the Ohio guide lists the state licensing rules.
Nearby guides
More local guides: Cincinnati energy guide, Fairfield, Middletown, Kettering and Beavercreek, or the whole Ohio energy guide.
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Hamilton energy FAQ
Who is my electric company in Hamilton?
Duke Energy Ohio Inc, Dayton Power & Light Co and City of Hamilton all serve parts of Butler County. Which one serves you depends on your street, so check the top of your bill. Their 2024 home price averages differ (Duke Energy Ohio Inc 15.0¢, Dayton Power & Light Co 15.32¢, City of Hamilton 15.44¢) so it matters for solar math.
How much power will solar make in Hamilton?
About 1,160 kWh a year per kW of panels by our estimate, so a 6 kW system would make roughly 6,960 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 tornadoes in Butler 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 Hamilton?
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.