We can analyze this issue with historical weather data, and it turns out it's tractable. Using solar + wind + batteries + non-fossil fuel turbines enables 365/

We can analyze this issue with historical weather data, and it turns out it's tractable. Using solar + wind + batteries + non-fossil fuel turbines enables 365/24/7 "synthetic baseload", 100% renewable. See https://model.energy/ https://model.energy/ for a web site that will solve this optimization problem for you in various places.