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Constellation challenges Ameren in downstate Illinois

Constellation Energy Group of Baltimore, through its subsidiary Constellation NewEnergy Inc., announced a plan to offer more than 330,000 downstate Illinois residential electric consumers up to 16 percent savings compared to rival energy supplier Ameren’s winter electric supply rates.

The offer expands the residential electric choice and savings offers Constellation Energy unveiled in February and extended this summer to 1.3 million ComEd residential customers.