Australia will need a four-fold increase in rooftop solar capacity, 10,000 kilometres of new and upgraded transmission lines, and a seven-fold increase in renewables, in order to deliver a safe, reliable and affordable energy network and net zero emissions by 2050.

That's according to the latest report from Australia's Energy Market Operator, the draft Integrated System Plan, which is Australia's roadmap for the National Electricity Market's transition away from fossil fuels.