I understand the confusion and frustration in this power transition, I\'ll try to help.
The current power tanks don\'t hold any power yet, this was an intentional move to allow ships to continue to function while players obtained and placed tanks on existing ship. The current load is stored in each ship block (an unfortunate oversight of buildings/ stations/land not having mass a mass value assigned and thus no power storage) this will shortly switch over to the tanks holding the actual power load, which should then fix the stations and other non ship buildings.
As for the power regen block, it will continue to use box dimension to calculate its regen rate, as far as I know there is no plan to remove that mechanic.
Beetle has mentioned a complex new \"atom\" mechanic, no real details on that tet but I\'m guessing that the 64 sub particles he mentioned in chat will drastically change factory\'s (this is an assumption on my part) leading to a redesign of how factories work, I hope this will streamline the process and ease your woes.