Kings Plaza has its own cogeneration plant on the roof of the mall, dubbed the Kings Plaza Total Energy Plant. The plant uses four Deutz AG natural gas engines to produce the mall's entire electricity needs, while the heat from the engine exhaust is used to heat and cool the building. As part of a recent sustainability effort, Macerich has equipped the plant with an interconnection to provide up to 6 MW of excess power to the local Con Edison grid if and when needed, which has been used particularly in the summer heat season. The plant, which was built with the mall, originally used five Nordberg-built diesel engines.