Powering the Ship

I've been working on a knighthawks campain and came up with some questions that I couldn't really find in the rules so I brought 'em to you guys<br /><br />-Are the ships engines also the power generator? (That was the expression that I got)<br />-If so do ships (or should they) have backup power systems in the form of genortators or prehaps  parabatteries on smaller ship?<br />-This leads to: How much power does it take to run a ship? How many SEUs does a shot with a laserbattery take?