Energy Supply Options (Residential) 
Customers of Ameren Illinois have three options for their energy supply. The Basic Generation Service (BGS) option is described below.
Basic Generation Service (BGS)
This default supply option represents the energy price obtained by Ameren Illinois through the independently managed and state-monitored (Illinois Commerce Commission) auction.
More about the BGS energy supply option:


  • Energy is provided to the customer at a fixed price by Ameren Illinois.
  • Service is for residential and small non-residential customers who do not choose a Retail Electric Supplier (RES).
  • Service does not include summer and non-summer charges.
  • Rider BGS - Basic Generation Service
Basic Generation Service (BGS) option, Basic Generation Service. bgs
Follow Us