It’s one of the common themes of studies that look at the challenge of the transition to 100 per cent renewables. The hardest bit is going to be the last five or ten per cent. Every grid, large or small, needs a lot of excess capacity to ensure there is enough electricity supply at all times – even those that operate largely on coal or gas. The challenge of variable wind and solar is how much extra capacity, and/or storage, is needed to deal with the possibility of an extended wind or solar drought. Enter green hydrogen. Or, to be specific, renewable hydrogen. The scale of the projects being proposed around Australia, and overseas, is phenomenal. One project alone, the Western Green Energy Hub north of Esperance, would include 50 gigawatts of wind and solar – not far short of the capacity of Australia’s main grid.
Renew Economy 7th Sept 2021 read more »