Tesla founder and CEO Elon Musk has long predicted the imminent end of the fossil fuel era. But it took a couple of tweets between him and another billionaire, Australia’s Mike Cannon-Brookes, on Friday to highlight just how close this is.

At 94, the co-inventor of the lithium-ion battery is still at the forefront of the energy storage revolution; leading a team that has developed a new battery technology promising better performance.

More than 100 Canberra homes and businesses have installed heavily subsidised battery storage systems through the ACT’s Next Generation Renewables Energy Storage Grants program.

The Victoria Labor government has announced that it is calling for expressions of interest to build a 20MW battery storage array, in what would likely be Australia’s first grid scale battery storage facility.