Fusion reactors may be found on Derelict Ships when salvaging via logistics drones. They require Deuterium as a fuel source, which may be bought from traders.
The deuterium requires a loader to be transfered to the fusion reactor, and can be stored in tanks
A fusion reactor requires 100 power to spin up, but charges like other equipment. After spinning up, it begins to intake deuterium. Once powered, they remain powered if fueled
Fusion reactors generate upto 500 power