"At the GM’s discretion, some larger starships might have onboard recharging stations. These might offer recharging at low or no cost, but they typically take 1 minute per charge to recharge a battery or power cell."
— Core Rule Book p234
Our group wants to have a Starship - either a stock build or a custom build - that has one of these "onboard recharging stations" but I could not locate such rules in the Ship Builder rules of the Core Rule Book, nor in the Starship Operations Manual.