St. Clair County · Ameren Illinois
Solar Panel Installation in O'Fallon, IL
Custom solar, battery storage, and EV charging for O'Fallon homes and businesses, with Illinois utility paperwork and permits handled for you.
Local Solar Installers Serving O'Fallon, IL
Cox Solar Solutions designs and installs solar for homeowners and businesses in O'Fallon and throughout St. Clair County. Every system is engineered for your roof, your annual usage, and the Illinois rules that apply to O'Fallon homes today.
Ameren Illinois customers who interconnect today receive supply-only net metering credits and are eligible for Ameren's $300-per-kW Distributed Generation Rebate on qualifying smart-inverter systems.
What to Look for in a O'Fallon Solar Company
Choosing an installer matters as much as choosing equipment. Before you sign, make sure your installer:
- Is an ICC-certified distributed generation installer
- Works with an Illinois Shines Approved Vendor and explains the disclosure form
- Pulls permits with O'Fallon or St. Clair County and handles inspections
- Manages interconnection with Ameren Illinois
- Models savings using post-2025 Illinois net metering rules
- Provides written workmanship and roof penetration warranties
Solar Incentives for O'Fallon Homeowners
O'Fallon homeowners can combine Illinois Shines REC incentives with Ameren Illinois's $300-per-kW Distributed Generation Rebate and Illinois' solar property tax alternate valuation, filed with the St. Clair County assessor on form PTAX-330. Income-eligible households may qualify for Illinois Solar for All.
Roof First, Then Solar
Solar panels stay on a roof for 25 years or more, so the roof under them should last as long. Through Cox Roofing & Restoration, we can inspect your roof, repair or replace it, and install solar as one coordinated project, which avoids paying to remove and reinstall panels later.
Battery Backup for Storms and Outages
Severe summer storms and winter weather can knock out power across St. Clair County. A home battery keeps essentials like the sump pump, refrigerator, furnace blower, and Wi-Fi running, and lets you use more of your own solar in the evening.
Services in O'Fallon
Solar Services for O'Fallon Homes & Businesses
Illinois Incentives
Ways O'Fallon Homeowners Save
- $300per kW
ComEd & Ameren solar rebate (smart inverter)
- $300per kWh
Utility battery storage rebate
- 15years
Illinois Shines REC contract
- 50%upfront
Of small-system REC value paid at energization
FAQ
Solar in O'Fallon: Common Questions
Is solar worth it in O'Fallon, IL?
For many O'Fallon homeowners, yes. Illinois Shines incentives, Ameren Illinois's $300/kW rebate, and property tax protection reduce the cost, while solar offsets rising supply charges. A free proposal shows your exact numbers.
Do I need a permit to install solar in O'Fallon?
Yes. Solar installations require building and electrical permits from O'Fallon or St. Clair County, plus utility interconnection approval. Cox Solar handles all of it.
How long does solar installation take in O'Fallon?
Installation usually takes one to three days. The full process, including design, permits, utility applications, inspection, and permission to operate, commonly takes 6 to 12 weeks.
Who is the electric utility in O'Fallon?
Most O'Fallon addresses are served by Ameren Illinois. We confirm your provider and its current net metering rules during your consultation.
Can you replace my roof before installing solar in O'Fallon?
Yes. Cox Roofing & Restoration handles roof inspections, repairs, and full replacements, so the roof and the solar array can be planned and installed as one project.
More Metro East Service Areas
Free solar quote
Get Your Free O'Fallon Solar Plan
See your system design, Illinois incentives, and estimated savings — no pressure, no obligation.