The Midwest Renewable Energy Tracking System (M-RETS) tracks renewable energy generation in participating States and Provinces and assists in verifying compliance with individual state/provincial or voluntary Renewable Portfolio Standards (RPS) and objectives. M-RETS is an important tool to keep track of all relevant information about renewable energy produced and delivered in the region.

Currently, several States and Provinces participate in M-RETS: Illinois, Iowa, Manitoba, Minnesota, Montana, North Dakota, Ohio, South Dakota, and Wisconsin have policies in place requiring or strongly encouraging utility development of renewable resources. Additional States and Provinces in the region are expected to join M-RETS after launch. M-RETS uses verifiable production data for all participating generators and creates a Renewable Energy Credit (REC) in the form of a tradable digital certificate for each MWh.

M-RETS production data is provided by the Midwest Independent Transmission System Operator, Inc. (Midwest ISO).

The M-RETS system is administered by APX, Inc which was awarded a contract by the Public Service Commission of Wisconsin to implement, operate and administer the program.