Saving energy is silly; the bottom line is money (was Forklifts tip

>> PS, for station keeping reasons, you want a power satellite to be as
>> efficient as possible (to reduce the area). And the more mass the
>> better. Lots of mass averages the light pressure acceleration over a
>> year. Really light power sats require many tons every year of station
>> keeping reaction mass to prevent light pressure from blowing them away
>> like dandelion fluff.
> You could use a power satellite like a solar sail spacecraft.
> In fact, a solar power satellite IS a spacecraft producing at least half
> the thrust which a solar sail spacecraft produces also.
> Why not using this thrust to steer the craft and sort of tack it to keep
> station?