I.What CEJA actually did for storage
CEJA is a broad law. It set retirement dates for coal and gas plants, propped up the state's nuclear fleet with credits, and expanded the renewable programs that pay for solar. On storage specifically, it leaned toward study and planning rather than one large purchase. It directed state agencies, including the Commerce Commission and the Illinois Power Agency (the state office that buys renewable energy credits on ratepayers' behalf), to examine how to value batteries and encourage them.
What CEJA did not do, at least at last public report, was create a big standalone storage target with dedicated dollars the way it built out solar through Illinois Shines (the state program, also called the Adjustable Block Program, that pays owners for the renewable credits their panels produce). That gap, storage without its own procurement, is the thing the current fight in Springfield is trying to close.
II.What the incentives look like
Today a Chicago battery project stacks its revenue from a few places. Northern Illinois, including the city and ComEd's territory, sits in PJM (the regional grid operator that runs the wholesale power market across much of the eastern United States). PJM pays batteries for capacity, the promise to be available when demand peaks, and for fast services like balancing supply and demand second to second. Those payments move with the market, so no honest developer quotes a fixed number.
State-side, standalone storage gets thinner support than solar does. A battery paired with panels can ride Illinois Shines. A battery on its own leans mostly on the federal investment tax credit, which since the 2022 federal climate law can cover a meaningful share of a standalone storage project's cost, plus whatever PJM pays. So the math today tilts toward federal and wholesale-market money, with state storage-specific dollars still pending.
III.Why developers watch Springfield
The open question is whether Illinois adds a storage procurement, a program that would have the Power Agency buy storage the way it buys renewable credits, giving projects a predictable state revenue line. Versions of that idea have moved through recent legislative sessions and stalled, so treat any real movement as news rather than routine. The players are familiar: the Power Agency and the Commerce Commission on the state side, ComEd in the north and Ameren in central and southern Illinois, and the labor and environmental coalitions that shaped CEJA in the first place.
Even with state money, the harder bottleneck may be the grid connection itself. The PJM interconnection queue (the line projects wait in to plug into the grid) has been backed up for years, and reforms are still working through. A battery can be funded, sited, and permitted and still wait a long time for a connection date, which is why timelines here deserve heavy hedging.
IV.Worth watching this month
1. Watch the Illinois Power Agency's long-term renewable resources plan process, updated on a roughly two-year cycle, for any language that would add storage-specific procurement (the item most likely to actually change the math).
2. Watch the spring session in Springfield for a storage procurement or target bill, since several have been introduced and stalled before, so movement would be real news rather than routine.
3. Watch open Commerce Commission dockets on utility grid plans for how batteries get treated on interconnection and rates, mostly routine but worth a scan.
4. Watch PJM's interconnection queue reform updates for any sign that northern Illinois storage projects can connect faster.
5. Watch ComEd's filings at the Commerce Commission for storage pilot proposals, which are usually small but occasionally signal a bigger shift.