Meteorologically speaking, it was a bad day for renewable energy. A dense fog enshrouded downtown Austin so completely that the Capitol wasn’t visible from two blocks away. Wind was nonexistent. My expectations were low as I took a short walk to the remote operations center of the second-largest wind-and-solar power producer in the state.But Texas, you may have heard, is big. Austin may have been mired in its own version of a Dunkelflaute, but elsewhere skies were blue and muscular breezes turned the giant blades of wind turbines. I knew this because my phone app for ERCOT, the main grid operator, told me that renewables were generating nearly a quarter of all the state’s electricity. It was an underwhelming performance. During the Goldilocks days of…