For the purposes of the Ameren Energy Master Agreement, On-Peak hours include Hour Ending (“HE”) 0700 through HE 2200 Eastern Standard Time (“EST”) Monday through Friday, excluding North American Electric Reliability Corporation (“NERC”) holidays.  Off-Peak hours are all hours of all calendar days in EST that are not On-Peak hours. Ameren does not make any adjustments for Daylight Saving Time.

For the purposes of the ComEd Energy Master Agreement, On-Peak hours include HE 0800 through HE 2300 Eastern Prevailing Time (“EPT”) Monday through Friday, excluding NERC holidays.  Off-Peak hours are HE 0100 through HE 0700 EPT and HE 2400 Monday through Friday, EPT; and HE 0100 through HE 2400 EPT Saturdays, Sundays, and NERC holidays.

For a list of NERC holidays please click here.