Even a maximum sized power plant in the red area needs ~41 hours to produce 99,999,999 units of power... and this is only for the lowest level with the ability of having a building differing from the tutorial (this level is merchant

).
So to be realistic: You need at least be entrepreneur to have got a maximum sized power plant, more likely billionaire to finance the expansion.
Then you will need ~59 hours to produce 99,999,999 units of power.
An ambitious player should be able to login every 59 hours to check his account.
I guess raising the maximum amount for productions makes you able to produce the easiest product, make lots of money and only need to login once a month or whatever.
Raising the maximum amount would lead to some kind of automatism - and less active players have the same chances as very active ones.
So: This won't come in this version.
