Or you can over-provision with renewables (which are cheap and getting cheaper all the time), or have utility/grid/home power storage, or balance renewable generation from different parts of the country/globe - it's always windy/sunny somewhere. There are lots of options.
Although that might _seem_ reasonable on its face, during peak periods (i.e. mid-winter during a cold snap), usually that other place you can get extra wind/sun supply from is on the other side of the globe.
