Yesterday, the Department of Energy took to social media to try and make a scandal out of a well-known fact: Solar panels do not generate power at night. During the early-July heat wave, ​“99% of solar power” in the mid-Atlantic ​“failed after sunset,” according to the graphic Wright’s Energy Department shared on X. As Wright and others at the DOE well know, solar may not work at night — but it excels in the day. AC is a lifesaver but also an electricity guzzler, and so all that cooling pushed the Texas grid to new highs. On Tuesday the state’s main power grid broke its all-time electricity-demand record.