Vessel Power Sources:

The power generation aboard a vessel is dependant on it's nation of origin and purpose.

Technologies in use:

 * Antimatter reactors: most races utilise antimatter-matter annihilation reactors as the primary source of power on vessels, due to the high levels of energy created from matter-antimatter interactions.


 * Fusion reactors: due to a lack of antimatter, or insufficient technological advancements, some races may use fusion reactors for in-system flight. The energy requirements of FTL mean that a fusion reactor is required on most interstellar vessels.


 * Solar panels: used by civilian craft and stations to conserve energy (and fuel) when transiting an inner star system. Too fragile to be used as a power source aboard military vessels.

Obsolete technologies:

 * Fission reactors: The cost of fuel, the low power output and the consequences of failure mean that fission reactors are not used aboard vessels, apart from museum pieces. The only scenario where a fission power source could be considered is emergency equipment designed to run for over a year without interruption, in the form of an RTG. Even then, an extensive solar array can usually be considered instead.


 * Chemical generators: when vessels can be required to go weeks to months without ressuply and energy costs for basic propulsion and FTL are extreme, chemical generators went obsolete before fission.