In Adelaide and Melbourne, demand could double in a heatwave due to air conditioning, Mr Skinner said.
"At about 7:00pm or 8:00pm on a typical Victorian weekday, the demand would be about 5,000 megawatts; on an absolute extreme stinker of a day, maybe 43 degrees or something, it would be around 9,500 megawatts.
In 2050, as much energy will be used for world air conditioning as the whole of China uses today to produce all its electricity.
2050 kommer lika mycket energi att användas till världens luftkonditionering som hela Kina använder i dag för att producera all sin elektricitet
Sydney records hottest November night on record