Artisan Archive

OK I dropped some harvestors last night on Dathomir and filled them up with 24 hours of power. When I returned to fill them up tonight all of them were still running but some of them had run out of power. I'm dropping radioactive power with 922 PE. Is this the way it has always worked? Sorry this is my first time using anything with a PE over 500. If this is the way it has always worked they need to add another field to the status window. One that shows the actual amount of energy left not just the Units left in the power reserve.

Is anyone else experiencing this?