Power core
From Wookieepedia, the Star Wars wiki.
A power core was an energy production facility that provided energy for buildings and starships. Cities had numerous power cores built within their boundaries to provide power to the various homes, facilities, and businesses established within. Colonies and encampments often had a more primitive form of power core that was little more than an oversized energy cell; rather than produce energy, it supplied it until it ran out. These smaller power cores were often used by survey teams due to their much smaller impact on the environment.
