Australia plans to have renewable energy completely sustain its electrical grid at certain parts of the day within the next four years. The Australian Energy Market Operator (AEMO) has released a report signalling that a surge in rooftop solar will drive up renewable energy generation across the National Electricity Market (NEM). A forecasted 8.9 gigawatts (GW) of commercial and residential solar will be installed across the NEM by 2025, adding to Australia’s existing 50 GW energy fleet. AEMO outlined that this alone could supply up to 77 percent of total electricity demand at points throughout the day, potentially reaching 100 percent renewable generation when combined with planned and existing utility-scale solar and wind farms. “By 2025, there will be periods of time when all customer demand could be met by renewable generation,” said AEMO CEO Daniel Westerman in a media release. “This underscores AEMO’s priority to develop grids that are …