Facilities are enhancements which built at bases. They often give multipliers for a specific base output such as Econ or Psych, or give morale boosts to units produced at that base, though many facilities have unique and complex effects. Each base can only contain one of each facility (though Satellites which are unconnected to specific bases can be built multiple times by each base, and Stockpile Energy is never actually built, it's more of a process). Many facilities require a maintenance cost in energy per turn which can sometimes outweigh their benefits in small bases. Facilities can be granted to all bases by faction bonuses or Secret Projects, and these do not require maintenance. When a base is captured facilities will be destroyed, making life especially hard for the occupying forces especially if drone control facilities are lost.