Power outage is such kind of thing for which one country needs to pay a huge price because power up means hampering each work and give maximum damage to the production of a country.
I think it's really difficult for us to stay a long time without power because we are not used to with it.
Scientist believe, one day our sun will be out of power hence they are preparing artificial sun and moon.
As well as I know the term is related to thermodynamics and the name of it is the thermal death of the world. But I never read about preparing an artificial sun in any scientific journals for that reason and making sun is not a solution of it. Besides I think making an artificial sun is impossible in my opinion.
!PIZZA