Solar Payback Calculator Illinois – 6 kW System
Estimate your solar panel payback in Illinois: a 6 kW system at 4.3 peak-sun hours and $0.16/kWh, with local incentives. Runs 100% in your browser.
Runs locally in your browser — no upload, no trackingTry: System size=6, Peak sun hours=4.3, Performance ratio (0–1)=0.85, Electricity rate=0.16, Installed cost=2.8, Federal ITC=30, State incentive=300, Annual elec. price rise=0.03, Net metering credit (0–1)=0.9 → 8,004 kWh/yr, $1,153/yr, $11,460, 9.9 years, $42,024
How to use
Illinois's Illinois Shines (adjustable block) program pays a lump-sum incentive for 15 years of renewable credits, on top of net metering. This page pre-fills a 6 kW system with Illinois's 4.3 peak-sun hours, $0.16/kWh rate and a net metering credit of 0.9. Adjust the system size, installed cost and federal ITC, then press Calculate.
The simple payback divides your net cost (after the 30% federal ITC and the $300 state incentive) by your first-year savings. Because electricity prices usually rise, the 25-year total understates your real savings if you leave the 3% default in place.
FAQ
What is the solar payback period in Illinois?
It depends on system size, your 0.16/kWh rate and local incentives, but Illinois's 4.3 peak-sun hours make a 6 kW system produce roughly 8,004 kWh a year. Enter your details above for the exact break-even year.