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On May 1, Germany ran almost entirely on renewables energy during the day
(transparency.entsoe.eu)
Some fossil-fuel-burning power plants were kept on at minimum operating levels (they're likely not designed for daily restarts) but provided less power than was used to pump water uphill in hydoelectric storage facilities.
That's awesome!
As a UK person working in battery energy I often take a look at the awesome https://grid.iamkate.com/ in a sunny and windy day to see how high renewables go. It's not uncommon for.them to jump past 90% in the right conditions.