Solar in Joliet, IL
With ComEd's electricity at about 19.3¢ per kWh and 1,344 kWh of sun per kW, solar is worth it for a typical Joliet home today: about a 12.4-year payback.
- Payback, typical home
- 12.4 yrsIllinois: 13.5 yrs
- 25-year net
- $24,589after paying $16,500
- Sun
- 1,344kWh per kW per year
- Electricity
- 19.3¢7% above U.S. average
A typical Joliet home, by the numbers
| Utility | ComEd |
|---|---|
| Electricity use | 622 kWh a month |
| Best-value system | 5 kW, about 12 panels, 6,722 kWh a year (90% of use) |
| Cost | $18,000, or $16,500 after state incentives |
| First-year savings | $1,232 |
| Payback | 12.4 years |
| Exported power | 9¢/kWh (ComEd) |
Cash purchase, no federal credit, 3.5% yearly rate increases. Run it with your own numbers.
Homes in Joliet
- Owner-occupied homes
- 74%
- Single-family detached
- 70%
- Median home value
- $266k
- Median year built
- 1985
- Population
- 150,445
- Roofs suitable for solar†
- 83%
Census ACS 2020–2024. †Share of 35,795 buildings Google Project Sunroof rated technically suitable (2019 snapshot).
Installers working in Joliet
Public installation records for Illinois don't name installers, so we can't rank local companies here. Browse installers in Illinois.
Always verify the license and get at least three quotes. Compare quotes side by side.
Questions about solar in Joliet
Is solar worth it in Joliet, IL?
For a typical home in Joliet, solar is worth it at 2026 prices: a 5 kW system costs about $16,500 after state incentives, saves about $1,232 in year one and pays back in about 12.4 years. Enter your address for an estimate based on your roof and bill.
How much solar power does a system produce in Joliet?
About 1,344 kWh per year for each kW of panels on a south-facing roof, based on PVWatts and local weather. That's 0% more than the Illinois average. East- or west-facing roofs produce roughly 10–20% less.
Who is the electric utility in Joliet?
Most homes in Joliet are served by ComEd, at about 19.3¢ per kWh on average.
How much do solar panels cost in Joliet?
A fair cash price is around $3.40 per watt before incentives, so about $18,000 for a 5 kW system. There's no federal tax credit for homeowners who buy in 2026.
Nearby
- Lockport 12.6 yrs
- Romeoville 12.5 yrs
- New Lenox 12.6 yrs
- Plainfield 12.5 yrs
- Bolingbrook 12.5 yrs
- Oswego 12.5 yrs
- Naperville 12.5 yrs
- Woodridge 12.6 yrs
- All of Illinois
Data: PVWatts (National Laboratory of the Rockies), EIA-861 2025 adjusted to 2026, U.S. Census ACS, LBNL Tracking the Sun, state policy research as of October 2026.