Coincident peak

A coincident peak (CP) is your demand measured at the exact interval when the entire system hits its maximum — as opposed to your non-coincident peak, which is whenever you happen to use the most. In ERCOT, transmission costs are allocated to consumers based on their share of system load during four summer peaks (4CP). If your facility is idle during those intervals, you pay dramatically less for transmission all next year. That is why predicting when the system peak will land is worth real money.