Missouri Public Service Commission

JEFFERSON CITY---The Missouri Public Service Commission has approved an application filed by Union Electric Company d/b/a Ameren Missouri to adjust the Renewable Energy Standard Rate Adjustment Mechanism (RESRAM) charge that appears on the monthly bills of its electric customers. The charge appears as a separate item on the monthly electric bills of Ameren Missouri
customers. The RESRAM charge is designed to recover costs associated with Missouri’s Renewable Energy Standard (RES).

A RESRAM allows electric companies to adjust rates outside of a general electric rate case to reflect prudently incurred renewable energy standard costs (such as solar and wind). These costs would be costs above renewable energy costs already included in the company’s base rates.

According to Ameren Missouri, this case reflects RES compliance costs incurred by the Company during the period of August 2022 through July 2023. For a residential customer using 1,000 kWh (kilowatt-hours) of electricity a month, the RESRAM charge will increase from approximately $0.35 a month to approximately $2.04 a month. The adjustment is expected to take effect on February 1, 2024.

Ameren Missouri serves approximately 1.2 million electric customers in Missouri.

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Case No. ER-2024-0112