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, 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 (MISO).

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.