Off-Peak vs. On-Peak

The term “Peak”, as it relates to electricity use, refers to the period of critical energy demand during any given day. This “peak period” can generally be described as the time during the day when the consumption of electricity is at its highest point. In UI’s service area, peak electricity demand occurs from late morning until late evening especially in the summer. Using electricity during this time is referred to as on-peak consumption.

Rate RT offers seasonal and time-of-use differentiated charges. Under Rate RT the rate charged during off-peak periods is lower than the rate charged during on-peak, reflecting the fact that the total cost of electricity is lower during the off-peak. This is also true of the seasonal differences in the rate. Rate RT charges are lower during the cooler winter months than during the summer when the demand for electricity is the greatest.

Rate RT offers seasonal and time-of-use differentiated charges

*    The summer period is June – September inclusive
** As of April 1, 2007 On-peak hours are:  12 p.m. – 8 p.m. Monday – Friday