Trouble Beyond the Borders
Most items and vehicles run on rechargeable energy cells, from a simple flashlight to a star ship. These E-Cells are made in standard sizes.
E-Cells can be charged a lot higher than a modern-day battery.
One of the first things that are built when the Empire has interest in a system is a large energy collection device that collects energy from the local sun. Often this energy is beamed to a number of planets and habits within the system. At least one of these will have an E-Cell charging center for Ships, usually at one of the high ports.
Ships are recharged at a rate specific to each ship. In order to facilitate charging, often a ship will have a small bank of capacitors that will hold part of the charging energy so that the charging can be done as fast and efficiently as possible.