Carol Stream homeowners in DuPage County benefit from Illinois Shines SREC incentives and ComEd DG rebates that can reduce solar+battery system costs by 40–55%. Under Smart Solar Billing, battery storage maximizes the value of every kilowatt-hour your system generates.
Buffalo Grove, IL
320 reviews
Certasun is the highest-volume residential solar installer in Illinois, verified through Illinois Shines project application data. Headquartered in Buffalo Grove, they serve the entire Chicago metro and northern Illinois. Every aspect of the project — sales, design, permitting, installation, and incentive processing — is handled in-house with no subcontractors. They guarantee system production over its lifetime and process all Illinois Shines SREC payments and ComEd DG rebates on behalf of customers. Certasun also offers Prio, a prepaid solar service product designed for ComEd customers navigating post-ITC economics.
Chicago, IL
185 reviews
RxSun is a Chicago-founded, locally owned residential solar company consistently ranked among the top five Illinois installers on EnergySage. Known for competitive pricing, premium REC+Enphase systems, and an industry-leading 30-year SolarInsure™ warranty covering parts, labor, and roof penetrations with zero deductible. All installations are performed in-house by NABCEP-certified installers. RxSun handles full SREC and ComEd rebate processing on behalf of customers.
Disclaimer: Company rankings are based on publicly available data including customer reviews, BBB ratings, years in business, and service offerings as of February 2, 2026. Featured companies may include paid placements.
ComEd serves Carol Stream under Smart Solar Billing, with export credits at ~6.8¢/kWh on supply charges only. DuPage County offers streamlined solar permitting. Illinois Shines SREC program and ComEd DG rebates remain the primary incentives for new solar installations.
Commonwealth Edison (ComEd)
Average Rate: $0.16/kWh
Smart Solar Billing (effective Jan 1, 2025). New solar customers receive export credits applied to supply and transmission charges only — not delivery. Credits roll over monthly and settle at avoided cost at end of annual cycle. Legacy customers who completed installation by Dec 31, 2024 retain full retail net metering for the life of their system. Supply rates are elevated (9.5–10.5¢/kWh) through May 2026 due to the 2024 PJM capacity auction spike; total all-in residential rate is approximately 15–16¢/kWh including delivery. A CEJA Carbon-Free Energy Resource Adjustment (CFRA) credit of ~4¢/kWh partially offsets supply costs for non-solar customers. ComEd launched a new Delivery Time-of-Day (DTOD) rate in February 2026 offering set delivery pricing across four daily time periods.
A solar+battery system in Carol Stream averages $37,800 for a 10.5kW solar system with a 10kWh battery. Illinois Shines SREC incentives can reduce net costs by 40–55%.
Carol Stream homeowners with a solar+battery system typically save $1,615 annually on electricity bills under Smart Solar Billing.
Illinois Shines SREC upfront payments, ComEd DG rebate ($300/kW solar + $300/kWh battery), Illinois property tax exemption, and sales tax exemption on solar equipment.
Learn more about solar energy in your area
AI data centers are driving Illinois electricity rates to record highs. Learn how residential solar panels, Illinois Shines SRECs, and battery storage can protect your household from rising ComEd and Ameren bills in 2026.
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