Solar and batteries are great for any region where solar production align with electricity consumption and where the battery solves the issue of night time.

Wind is great to reduce fossil consumption to around 50% in regions where the conditions of solar is not great. After 50% the cost increase significantly as overproduction competes with existing investments and prices drops below zero (see Denmark as an example). Batteries is also prohibitively expensive to cover months of poor production, which is why regions that heavily invest into wind also construct thermal power plants for equal capacity that burn carbon rich fuel for electricity and heat (see all of central/northern Europe). Regions with colder climates also has inverse consumption behavior than warmer climates, which mean that solar produce the least when consumption is highest. This is where nuclear can be economical viable, but only if we discontinue building more thermal power plants that burn cheap fuel. EU voting to have natural gas defined as "green" demonstrate this perfectly well, as well as the complete lack of any political party advocating to building battery as the solution for low wind production.