Depends on your shields, google Erkul in google and get your loadout up on there and see what your power usage is. This is my current loadout and you can see I have 1 power to spare but if I change the mirage shield to an Fr-66 I would use the Overdrive gen instead due to power generation and startup time. P.S. make sure you have shields set to charging when checking power usage, shields switch to idle when at full and don't give a true power usage reading lol.
Hope this helps!