Germany already does that quite a lot (>30% of their production in average come from renewable), but there is a distribution issue. The north generates a lot of electricity using a combination of windmills and solar panel, but the south doesn’t for some reasons (I guess the environment isn’t adapted? Not sure why). And there are a lot of problems (not necessarily technical) to bring the electricity from the north to the south. As far as I understood, the government need to get the authorization from each land owner on the way to be able to install new cables and infrastructure, and that takes crazy amount of time. Nobody want to have this going through their property.