SUMMIT Energy Solutions

Lisle city reference

Solar in Lisle, checked against utility math.

A city-level guide for DuPage County homeowners comparing quotes, system size, incentive timing, and Commonwealth Edison billing assumptions.

Reference ZIP
60532
Utility
ComEd
Focus
Illinois Shines + utility billing

Local numbers

The Lisle baseline

A 7 kW south-facing system in Lisle produces about 9,200 kWh/year per NREL PVWatts. Pre-incentive install cost runs $19,600 to $23,800, with cash payback around 7 to 8 years before financing markup.

9,200 kWh/year

Annual production

PVWatts v8, 7 kW south-facing.

~$9,100

Net cash cost

After incentives, before financing.

7 to 8 years

Cash payback

No dealer-fee markup.

12 to 15 years

Financed payback

With typical dealer fees.

Utility context

The bill rules are local.

Most of Lisle is served by Commonwealth Edison. Net metering, rate trajectory, and program timing differ by utility; the Illinois state hub covers the cross-utility picture.

ComEd DuPage County Verified 2026-05-29