Illinois doubles capacity of solar incentive program ahead of federal ITC phase-out

A community solar project in Illinois by Ampion.

On October 17, the Illinois Commerce Commission (ICC) approved major updates to the Illinois Power Agency’s Long-Term Renewable Resources Procurement Plan (LTRRPP) 2024 – 2026 to expand solar capacity and protect Illinois consumers from rising energy costs.

The ICC’s decision allows for an immediate expansion of the ICC Adjustable block program by 100% – doubling the community, commercial and small-scale solar categories – and promoting new competitive procurement for utilities, ahead of the phase-out of federal investment tax credits (ITC). The ruling allows developers to bring hundreds of additional megawatts of affordable, clean energy online while securing lower costs for ratepayers through efficient use of existing funds.

“This decision is a major win for Illinois’ clean energy future,” said Andrew Linhares, senior manager for the Central Region at SEIA. “By expanding solar capacity now, the Commission is helping ensure that Illinoisans benefit from lower costs, greater reliability and good-paying local jobs. It’s exactly the kind of progressive action we need to keep Illinois on track as a national leader in renewable energy.”

Illinois’ approach stands out nationally. While many states have slowed procurement in response to federal uncertainty, Governor Pritzker’s administration and the ICC have moved quickly to accelerate renewable energy investments that create local jobs, stabilize bills, and strengthen the reliability of the electric grid. The expanded capacity will also prioritize projects that can begin construction before the ITC sunset, ensuring maximum economic value for Illinois consumers and workers.

News release from Solar Powers Illinois

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