IL SB3246

Requires the Illinois Power Agency to procure at least 1,038 megawatts of stand-alone energy storage systems (excluding hydrogen batteries) that can achieve commercial operation by December 31, 2029, or no later than December 31, 2030

Excludes hydrogen batteries from net metering eligibility for energy storage systems with nameplate capacity up to 5,000 kilowatts

Establishes distributed generation rebates of $300 per kilowatt-hour for energy storage systems (excluding hydrogen batteries) until a threshold date, then $250 per kilowatt-hour afterward

Requires counties to apply NFPA 855 standards for general energy storage facilities and NFPA 853 standards specifically for hydrogen battery installations

Amends decommissioning plan requirements to allow facility owners to follow either NFPA 855 or NFPA 853 (for hydrogen batteries) standards