This subchapter applies only to the ownership or operation of electric energy storage equipment or facilities in the ERCOT power region that are intended to:
(1) provide energy or ancillary services at wholesale, including electric energy storage equipment or facilities listed on a power generation company's registration with the commission or, for an exempt wholesale generator, on the generator's registration with the Federal Energy Regulatory Commission; or
(2) provide reliable delivery of electric energy to distribution customers.