I'm now one step further:
V2H (Vehicle-to-Home, i.e., bidirectional charging) is obviously extremely interesting for me as a photovoltaic owner without a battery storage system. Unfortunately, this is still in its infancy, and the few wall boxes that support it cost a small fortune (from what I've read, starting at €5,000). Since we won't be using the charging stations for at least 2 to 3 years anyway, I will now forgo additional features and install the cheapest eligible charging stations to take advantage of the subsidy.
If the whole topic becomes market-ready in a few years, it should be relatively easy to retrofit.
I think this makes more sense for our scenario than paying several hundred euros extra now for features that I don't use yet and that will eventually become outdated.