Rockford Energy Guide: Solar, Batteries, Backup Power and EV

In short: Rockford is ComEd country, with Rock Energy Cooperative serving rural parts of Winnebago and Boone counties. Rock Energy reported just 18 minutes of outages per customer in 2024, against 132 for ComEd systemwide (EIA). Winnebago County’s top risks are cold waves, then ice storms, hail, flooding and strong wind (FEMA).

Here is what matters for backup power, solar, batteries and EV charging in and around Rockford. Statewide rules, such as the 2025 net metering change, Illinois Shines and installer certification, are in our Illinois energy guide.

Rockford at a glance

• ComEd: about 15.2¢ per kWh on average in 2024 for homes buying power from ComEd; 132 minutes of outages per customer with major events, 36 without, across its whole system (EIA-861, 2024).
• Rock Energy Cooperative: about 15.0¢ per kWh in 2024; 18 minutes of outages per customer with major events, 16 without, and about one interruption every two and a half years on average (EIA-861).
• Supplier choice: ComEd customers may buy supply from another company; about one in five ComEd households did in 2024 (EIA-861).
• Sun: about 3.9 kWh per square meter per day (NASA POWER, 2001 to 2020). Our rough estimate: about 1,150 kWh a year per kW of panels, a little more than in Chicago.
• Top hazards: Winnebago County is “very high” for cold waves and “relatively high” for ice storms, hail, flooding, lightning, strong wind, tornadoes and winter weather (FEMA National Risk Index, December 2025).
• Public charging: 93 ports at 22 locations in Rockford (39 Level 2, 54 DC fast), plus a few in Loves Park and Machesney Park (AFDC, October 3, 2026).

Your utility and what it means

• ComEd (most of Rockford): new solar systems since 2025 earn export credits on the supply part of the bill. On ComEd’s fixed price you pick kWh or dollar credits; on Hourly Pricing, exports are paid at that hour’s price. Credits don’t expire, but they don’t reduce the customer and meter charges. ComEd pays a one-time $300 per kW rebate for solar with a smart inverter, and $300 per kWh for a battery paired with solar. Since June 1, 2026 the battery rebate requires ComEd supply on a qualifying rate for the battery’s life and a place in ComEd’s scheduled virtual power plant, expected from March 2027 (ComEd terms, 2026). If you buy from another supplier, ask it how it credits exports.
• Rock Energy Cooperative (rural areas): co-ops set their own net metering and interconnection rules, and ComEd’s rebates do not apply. Ask the co-op before you design a system. EIA counted 72 home solar systems on its Illinois lines in 2024.

Backup power in Rockford

FEMA puts ice storms among Winnebago County’s higher risks. Ice on lines and branches causes the slow kind of outage: many breaks at once, in the cold, when a furnace blower and a sump pump both need power. Spring brings hail, wind and tornadoes, and FEMA also rates river and inland flooding “relatively high” here.

For a few hours of outage, a portable power station covers lights, Wi-Fi, phones and medical devices. To keep heat and a sump pump going on their own, look at a home battery or a standby generator on natural gas; a portable generator with a transfer switch is the budget route. Compare all four in backup power options, and size them with the battery backup calculator and generator sizing tool.

Ice-storm safety: the U.S. Consumer Product Safety Commission says to run a generator outdoors only, at least 20 feet from the house, with exhaust away from doors, windows and vents, and never in a garage, even to keep it out of the ice. Use battery-backed carbon monoxide alarms. Wiring a generator into the house takes a transfer switch or interlock from a licensed electrician and a permit; see generator installation.

Solar in Rockford

By our rough estimate, a kW of panels in Rockford makes about 1,150 kWh a year on a flat surface; a south-facing tilted roof without shade usually does better, and December sunlight is only about a quarter of June’s (NASA POWER). With ComEd’s supply-only export credit, the best-paying systems are sized to your own daytime use. Get a roof-specific estimate with the solar potential tool, then test quotes in the solar savings calculator.

Inside the city, Rockford’s Community and Economic Development department publishes solar permitting guidance and a 2026 solar permit checklist. In unincorporated Winnebago County, the county Building Division has its own solar permitting checklist. Either way, the installer needs Illinois Distributed Generation Installer certification, and ComEd or Rock Energy must approve the connection. More in solar installation and how net metering works.

Batteries in Rockford

A battery earns its keep twice here: winter backup for heat and the sump pump, and storing midday solar for the evening instead of exporting it for a supply-only credit. ComEd’s $300 per kWh rebate is generous, but it ties you to a ComEd supply rate (the Citizens Utility Board lists Hourly Pricing) and to its virtual power plant. If you prefer a fixed-price supplier, the rebate may not fit. Homes on Rock Energy’s lines should ask the co-op how it treats batteries. See home battery installation and home battery cost.

EV charging in Rockford

Rockford’s 93 public ports lean toward fast charging: 54 DC fast against 39 Level 2 (AFDC, October 3, 2026). For daily driving, home charging is cheaper. ComEd’s EV Charger and Installation Rebate requires a flexible rate such as Hourly Pricing for at least three years, and ComEd says charging between 1 and 5 a.m. on Hourly Pricing could save about 25% on supply versus its fixed price. Check ComEd for current rebate amounts. A Level 2 charger needs a licensed electrician and a city or county electrical permit; see EV charger installation and the EV charging cost calculator.

Drive on another fuel? See every alternative fuel station in Rockford: hydrogen, propane, natural gas, E85 ethanol, biodiesel and renewable diesel.

Permits and inspections

• City of Rockford: Solar Permitting and Solar Installation Inspection pages (Community and Economic Development).
• Unincorporated Winnebago County: Winnebago County Building Division, including its solar permitting checklist.
• Electrical work: generators, battery systems and EV chargers need a licensed electrician; ask the permit office which local license it checks.
• HOAs: if you live in a subdivision with an association, get its written approval before you sign.

Cities we cover

• Rockford

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Rockford energy FAQ

Who supplies electricity in Rockford?

ComEd delivers power in the city, and you can buy the supply from ComEd or from another licensed supplier. Some rural homes in Winnebago and Boone counties are served by Rock Energy Cooperative instead. Your bill shows which applies, and the solar and battery rules differ between the two.

Do I need a permit for solar panels in Rockford?

Yes. The City of Rockford handles solar permits and inspections through its Community and Economic Development department and publishes a 2026 solar permitting checklist. Outside city limits, Winnebago County’s Building Division issues the permit and has its own checklist. Your installer also needs utility approval to connect.

Is a generator or a battery better for Rockford winters?

For a long ice-storm outage, a natural gas standby generator runs the longest. A battery is quieter, runs indoors and switches over by itself, and with solar it can recharge, but winter sun is weak. Start by listing what must run, usually the furnace blower, sump pump and fridge, then size with our calculators.

Can Rock Energy Cooperative members get ComEd’s solar rebate?

No. ComEd’s distributed generation rebates are for ComEd delivery customers. Rock Energy, like other Illinois co-ops, sets its own net metering and interconnection policy. Ask the co-op what it offers and what it requires before you sign a solar or battery contract.

Sources

Utilities, prices, outages and solar counts: U.S. Energy Information Administration, EIA-861 data for 2024. ComEd net metering FAQ, DG Rebate page and 2026 terms, and Hourly Pricing EV page, read October 3, 2026; Citizens Utility Board fact sheet, March 2026. City of Rockford and Winnebago County permit pages, October 3, 2026. Sun: NASA POWER, 2001 to 2020. Hazards: FEMA National Risk Index, December 2025. Charging: Alternative Fuels Data Center, October 3, 2026. Generator safety: CPSC.