In short: Iowa City has about 76,700 people and sits in Johnson County. MidAmerican Energy Co, Interstate Power and Light Co and Linn County REC serves different parts of Johnson County, so your utility depends on your address; their 2024 home averages range from 11.01¢ to 17.9¢ per kWh (EIA). FEMA rates Johnson County strong winds “very high”. Rooftop solar here makes roughly 1,180 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 Iowa City: its utility, outage records, sunshine, weather risks and charging. Statewide rules such as net metering, incentives and electrician licensing are in our Iowa energy guide and the wider area is covered in the Cedar Rapids–Iowa City guide.
Iowa City at a glance
- Place: Iowa City, Johnson County, Iowa; about 76,710 residents (Census Bureau estimate, July 2024).
- Utility: MidAmerican Energy Co (investor-owned). Homes paid an average 11.01¢ per kWh in 2024 (EIA-861); the average customer lost 88 minutes of power on normal days and 219 counting major storms, with 0.8 interruptions a year (utility-wide, not just Iowa City).
- Utility: Interstate Power and Light Co (investor-owned). Homes paid an average 17.9¢ per kWh in 2024 (EIA-861); the average customer lost 99 minutes of power on normal days and 116 counting major storms, with 1.0 interruptions a year (utility-wide, not just Iowa City).
- Utility: Linn County REC (member-owned cooperative). Homes paid an average 14.23¢ per kWh in 2024 (EIA-861); the average customer lost 116 minutes of power on normal days, with 1.5 interruptions a year (utility-wide, not just Iowa City).
- Sun: 4.03 kWh per square meter per day on average, from 1.54 in December to 6.33 in July (NASA POWER). Our rough estimate: about 1,180 kWh a year per kW of panels.
- Climate: about 1,010 cooling degree-days and 6,280 heating degree-days a year (base 65°F, NASA POWER), so heating is the big load.
- Top hazards in Johnson County: strong winds “very high”, tornadoes “relatively high” and hail “relatively high” (FEMA National Risk Index; overall county risk rated “relatively moderate”).
- Public charging: 85 ports at 40 locations in Iowa City, 17 of them DC fast (AFDC, October 20, 2026).
Your utility and what it means
MidAmerican Energy Co is an investor-owned utility and served about 632,436 home customers in 2024; its 11.01¢ average was below the 15.99¢ statewide average for July 2026. Interstate Power and Light Co is an investor-owned utility and served about 417,153 home customers in 2024; its 17.9¢ average was above the 15.99¢ statewide average for July 2026. Linn County REC is a member-owned cooperative utility and served about 30,323 home customers in 2024; its 14.23¢ average was below the 15.99¢ 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, Linn County REC reported 116 minutes per customer without major storms in 2024, more than the statewide figure of 90 (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 Iowa guide and then ask your utility for its current interconnection steps before you sign anything.
Backup power in Iowa City
- Strong winds (very high): High winds knock out lines on ordinary days. A battery or portable power station handles the common short outages; add a generator for multi-day repairs.
- 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.
- 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 Iowa City
By our rough estimate each kW of panels makes about 1,180 kWh a year in Iowa City (NASA sunshine data times 365 days times 0.80 for system losses). Valued at MidAmerican Energy Co’s 2024 average of 11.01¢, that is about $130 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 6.33 and December the dimmest at 1.54, a 4.1-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. Iowa City has 85 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 Iowa City: 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 Iowa City building or permitting department, or from Johnson County if you live outside city limits, and often a utility interconnection approval. We have not verified a local permit page for Iowa City, so check the city and county websites or ask your electrician, who will know the process. Hire only a licensed electrician or installer; the Iowa guide lists the state licensing rules.
Nearby guides
More local guides: Cedar Rapids–Iowa City energy guide and Marion, or the whole Iowa energy guide.
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Iowa City energy FAQ
Who is my electric company in Iowa City?
MidAmerican Energy Co, Interstate Power and Light Co and Linn County REC all serve parts of Johnson County. Which one serves you depends on your street, so check the top of your bill. Their 2024 home price averages differ (MidAmerican Energy Co 11.01¢, Interstate Power and Light Co 17.9¢, Linn County REC 14.23¢) so it matters for solar math.
How much power will solar make in Iowa City?
About 1,180 kWh a year per kW of panels by our estimate, so a 6 kW system would make roughly 7,080 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 strong winds in Johnson 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.
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 Iowa City?
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.