In a Net Zero world, what will we do when the wind isn’t blowing? Environmentalists like to point out that we will have solar power as well, but of course the sun doesn’t shine at night, so windless nights are a big problem.
Next, it is suggested that we can store electricity. But in winter we frequently get long wind lulls, and with the sun low in the sky, there will be little or no solar power either. These so-called “dunkelflautes” mean little or no electricity supply from the renewables fleet.
A dunkelflaute can last for weeks. That means you need huge, unfeasible quantities of electricity storage. The Royal Society recently concluded we’d need enough to cover more than two months’ demand, and, whatever storage technology is adopted, this isn’t going to be affordable or probably even possible. The Royal Society’s numbers suggest we’d need to deliver a project equivalent in size to HS2 every year, forever.…/green-energy-solar-wind…/

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