It is all about the sustainability of the "base" energy supply, the part about what is the bare minimum power output needed for power generators to be running b

It is all about the sustainability of the "base" energy supply, the part about what is the bare minimum power output needed for power generators to be running before kicking in extra power generators. If the baseline base power supply is not maintained, then no amount of cyclic power supply can help out there. Solar and wind power generators are never considered as a base power supply unless they run 100% 24/7/365. Only Antarctica science bases can boast the steadiest wind supply but is more prone to mechanical failures. And solar power is keyed only to daylight hours.