Loss-of-Load Probability

LOLP.

Last Updated:  June 20, 2025

Definition by NERC

Source:

Loss-of-Load Probability (LOLP) is the probability of system demand exceeding the generating capacity during a given period. If LOLP is the number of days on which there is expected to be a shortfall per year, it is the same as LOLE. However, other definitions of LOLP are also used.