LOLEV. The number of events in which some system load is not served in a given year.
Last Updated: June 20, 2025
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Loss-of-Load Events (LOLEV) is the number of events in which some system load is not served in a given year. A LOLEV can last for one hour or for several contiguous hours and can involve the loss of one or several hundred megawatts of load. TRE-ERCOT is the only Assessment Area to provide this metric in its regional assessment.