High-voltage transmission lines at dusk

Market Intelligence

Illinois Energy Market

PJM capacity prices, the 2025 Resource Adequacy outlook, the CRGA Act, and the rate trends driving commercial energy decisions across ComEd and Ameren territory.

In this series

Decision-grade guides, kept current.

Rooftop solar at GEC’s Precision CNC Manufacturer project in Illinois

Illinois Energy Market

Illinois Commercial Solar in 2027: What Can It Reduce on Your Electric Bill?

Start with the power your facility uses during solar hours. Then connect bill savings, Illinois incentives and the federal credit to a realistic 2027 operating plan.

October 23, 2026 · 10 min read
GEC commercial battery guide: ComEd rebate dispatch rules, savings and backup

Illinois Energy Market

ComEd Battery Rebate Dispatch Rules: Savings and Backup

A practical guide to ComEd’s rebate-linked dispatch commitment, seasonal payment and battery reserve for commercial facilities planning for 2027.

October 10, 2026 · 14 min read
GEC editorial graphic: PJM capacity price chart jumping 833 percent from $28.92 to $269.92 per megawatt-day, then three bars held at the price cap, above a night industrial skyline

Market Insights

The Capacity Squeeze, Part 1: How PJM Capacity Prices Rose 833 Percent and Why They Are Not Coming Down

PJM's capacity price went from $28.92 to $269.92 per megawatt-day in a single auction, and the three auctions since have all cleared at the cap. What happened, what it is doing to real manufacturers in Ohio and Pennsylvania, and why northern Illinois has more at risk than its current bill shows.

July 27, 2026 · 11 min read

Illinois Energy Market

ComEd Demand Charges and Battery Payback: The Worked Guide for Illinois Businesses (2026)

ComEd bills three separate charges that matter to a commercial account: energy, the Distribution Facilities Charge, and PJM capacity. A battery can attack two of the three. Here is the actual math, worked against a representative 500 kW facility, including where it does not pay back.

July 16, 2026 · 15 min read

Market Insights

Why Illinois Commercial Electricity Costs Keep Climbing in 2026, and What Manufacturers Can Do About It

Illinois commercial power costs are rising for structural reasons: PJM and MISO capacity charges and fast-growing data center load. Here is what changed in ComEd and Ameren territory, what is filed for summer 2026, and the one cost lever a manufacturer actually controls.

June 1, 2026 · 9 min read

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