Bruce A Turbine Hall December 2002” by Pencefn is licensed under CC BY 3.0

an industry term for transmission or distribution utility, load aggregator, power marketer, or other entity that has a contractual or regulatory obligation to sell and/or deliver electric energy to end users.


Provides a point of control and organizational reliability for transmission system operators.


Becoming an LSE is a protracted and potentially quite expensive process.

Real Talk

California ISO recently updated the term to include any entity granted authority to serve its own loads (such as Bay Area Rapid Transport or BART), potentially setting up legal and financial implications for communities moving to organize their own energy futures.