Solar Panel Savings in Joliet, IL
Calculate how much you can save with solar panels in Joliet, Illinois. Based on 3.8 peak sun hours/day and 14.4¢/kWh average electricity rate.
3.8
Peak Sun Hours/Day
14.4¢
Avg Rate (¢/kWh)
12.9 yr
Payback Period
$12k
25-Year Savings
Joliet Solar Overview
Calculate Your Joliet Solar Savings
Joliet average: $129/mo
South-facing roofs produce the most energy
Add $8,000-$12,000 for whole-home battery backup
Annual Production
kWh/year
Annual Savings
per year
Net System Cost
after 30% ITC
Payback Period
break-even time
25-Year Total Savings
$32,757
Monthly Savings
$80
Federal Tax Credit
$5,292
Cumulative Savings vs System Cost
Cost Breakdown
| Item | Joliet | National Avg |
|---|---|---|
| Gross System Cost (6kW) | $17,640 | $17,100 |
| Federal Tax Credit (30%) | -$5,292 | -$5,130 |
| Net System Cost | $12,348 | $11,970 |
| Cost Per Watt | $2.94/W | $2.85/W |
Solar Potential in Joliet
Sun Hours vs National Average
Joliet gets 16% less sun than the national average, but high-efficiency panels compensate.
Climate Advantages
- 189 sunny days per year
- Average temperature: 59.4°F — cooler temps actually improve panel efficiency
- Average roof size: 2,091 sq ft — enough for a 116-panel system
Joliet Solar Incentives & Programs
Federal Investment Tax Credit (ITC)
30% of total system cost deducted from federal taxes. For a $17,640 system, that's a $5,292 credit. Valid through 2032.
Illinois State Incentives
Illinois SREC program (Adjustable Block Program); $80-$90/MWh SRECs.
Net Metering — ComEd
ComEd offers net metering in Joliet. Earn credits for excess solar energy sent to the grid, reducing your electric bill further.
Environmental Impact in Joliet
2.8
Tons CO2 Offset/Year
46
Equivalent Trees Planted
0.6
Homes Worth of Energy
Based on 6,658 kWh annual production with a 6kW system. EPA average: 0.417 metric tons CO2 per MWh, 10,632 kWh per US home.
Solar Energy in Joliet, Illinois
Joliet, Illinois receives an average of 3.8 peak sun hours per day, offering adequate solar resources for homeowners looking to reduce their electricity bills. With electricity rates averaging 14.4¢ per kWh from ComEd, near the national average, solar provides competitive returns on investment.
A typical 6kW solar system in Joliet produces approximately 6,658 kWh per year, saving homeowners an estimated $959 annually. The system pays for itself in about 12.9 years, after which you enjoy essentially free electricity for the remaining 12+ years of the system's warranty life.
Joliet has a solar penetration rate of 4.6% — indicating early-stage solar adoption with tremendous growth potential as prices continue to fall. The cost of living index of 92 (national average: 100) reflects a lower cost of living, keeping installation costs competitive.
Other Cities in Illinois
Champaign, IL
Chicago, IL
Naperville, IL
Peoria, IL
Rockford, IL
Springfield, IL
Frequently Asked Questions
How much do solar panels cost in Joliet, IL?
The average cost of a 6kW solar panel system in Joliet is approximately $17,640 before incentives ($2.94/watt). After the 30% federal Investment Tax Credit, the net cost is about $12,348. Illinois SREC program (Adjustable Block Program); $80-$90/MWh SRECs.
How many peak sun hours does Joliet get?
Joliet, IL receives an average of 3.8 peak sun hours per day and approximately 189 sunny days per year. While below the national average, solar panels can still provide significant savings due to advancing panel technology.
What is the solar payback period in Joliet?
The average solar payback period in Joliet is approximately 12.9 years. After payback, your solar panels generate essentially free electricity for the remaining 15-20 years of their warranty. Over 25 years, total savings can reach $11,627.
Does Joliet have net metering?
Yes, Joliet has access to net metering through ComEd. This allows you to earn credits for excess solar energy sent to the grid, significantly improving your solar investment returns.
Is solar worth it in Joliet, IL?
Yes, solar is a solid investment in Joliet. While the 12.9-year payback is moderate, you'll still save $11,627 over 25 years. The 30% federal tax credit and local incentives help make solar financially attractive.