South Australia has just chalked up what is undoubtedly a world first – a run of more than 10 consecutive days over which the average production of wind and solar accounted for 100 per cent of local demand.South Australia does not yet have enough storage to soak up the excess load, but that may be at least partially solved by the addition of at least three new big batteries – at Blyth, Bungama and Tailem Bend – and likely more – and the completion of the new link to NSW with an export capacity of up to 800MW.Excess wind and solar could also be absorbed by green hydrogen electrolysers – which will both soak up surplus output, but also feed into one of the world’s first large scale hydrogen power plants, to provide green power back into the grid when the wind blows less and the sun is not shining.Meanwhile, another energy expert, David Osmond, who works at Windlab and produces a weekly simulation of Australia’s potential for renewables with just five hours of storage, across the whole National Electricity Market, not just South Australia.“Record high solar production along with good wind resulted in record excess generation, and almost no need for any storage during the entire week,” he says, adding that this meant the whole grid could have been 100 per cent renewable, assuming enough capacity is actually built, and 99 per cent over the last 69 weeks."