SUMMIT Energy Solutions

Oak Forest city reference

Solar in Oak Forest, checked against utility math.

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

Reference ZIP
60452
Utility
ComEd
Focus
Illinois Shines + utility billing

Local numbers

The Oak Forest baseline

A 7 kW south-facing system in Oak Forest produces about 9,400 kWh/year per NREL PVWatts. Pre-incentive install cost runs $19,600 to $23,800, with cash payback around 7 to 9 years before financing markup.

9,400 kWh/year

Annual production

PVWatts v8, 7 kW south-facing.

~$9,100

Net cash cost

After incentives, before financing.

7 to 9 years

Cash payback

No dealer-fee markup.

13 to 15 years

Financed payback

With typical dealer fees.

Utility context

The bill rules are local.

Most of Oak Forest 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 Cook County Verified 2026-05-29