Germany would be a good fit for a battery factory for several reasons:
- Long standing tradition for high quality, high tech, high volume manufacturing.
- Most serious EU country when it comes to making a truly green transition (see solar incentives for one)
- Domestic car manufacturers will definitely want to secure access to volume production of high quality, state of the art, best bang-for-buck batteries. I'm thinking WV, BMW, Mercedes, Audi (for mainly press release reasons when it comes to Audi). These big OEMs are vital to the German national economy, employment etc. And the government are large owners. Trust me Germany's national interests and the interests of BMW/Audi/Daimler/VW do overlap to a large extent.
Slovenia could be a dark horse. They have some very attractive tax incentives in place to attract large foreign investors in modern industry projects.