Main power plant
The main power plants, also known as main power banks were energy-production components aboard certain Federation starships.

In 2267, Captain James T. Kirk received a full damage evaluation from Lieutenant Commander Spock about the  in which all power plants were dead. ()

In 2268, Doctor Richard Daystrom ran tests on the M-5 multitronic unit in engineering and determined that it must be hooked into the 's main power plants in order to be operative. Chief Engineer Montgomery Scott wouldn't allow the necessary power without orders from Captain James T. Kirk. ()

See also
Power plant
Reserve energy bank
Energy technology
Propulsion technology