IL SB1879

Requires alternative retail electric suppliers to submit annual rate reports to the Illinois Commerce Commission and Attorney General by May 31, 2020 and June 30 each year thereafter, detailing all rates charged to residential customers and any additional fees.

Mandates that alternative retail electric suppliers make rate information publicly available on their websites without customer login requirements, including variable, time-of-use, and fixed rate contracts with all associated charges.

Establishes strict consumer consent requirements for alternative retail electric suppliers to access customer interval meter data, requiring separate authorization through letter of agency, third-party verification, or recorded enrollment with clear disclosures in the consumer's language.

Prohibits alternative retail electric suppliers from releasing, selling, or disclosing customer interval data except for specific limited purposes including billing, service administration, and pricing, with prohibition on disclosure to sales agents for targeted marketing.

Requires electric utilities serving over 500,000 retail customers to electronically transmit interval meter usage data to authorized alternative retail electric suppliers within one business day of monthly billing validation, at a reasonable fee set by the Illinois Commerce Commission.