I'm using Kopernicus and I didn't wanted to uninstall it. So I placed this file in GameData/Kopernicus/Config/Kopernicus.cfg and now Solar Panels (Photovoltaic) are working again. // Why we are disabling the Kopernicus custom module implementing their multi-star fix: // - we can't leverage it for background simulation // - warp fixer de-facto replace their computations anyway // - a lot of our code assume a single star, multiple stars support is planned for a future release // - lack of time