Tesla has been rolling out its latest V4 Supercharger throughout Europe since March, and from April some of these have been opened up to non-Tesla vehicles which support CCS2. So far, Tesla has been mum on the V4's maximum charging capacity, but rumor had it it was 350 kW.
Now, that number has finally been confirmed - but not by Tesla, mind you. Instead, the confirmation comes from paperwork filed in relation to adding 16 V4 chargers in the UK town of Swindon. Since it's rather unlikely that Tesla will publish detailed specifications for these chargers, this is probably the best confirmation of their abilities that we're ever going to get.
Tesla's V3 Superchargers only go up to 324 kW, so V4s are definitely more powerful - if not by all that much. 350 kW is about the fastest mainstream charging speed supported by EVs right now, and so with Tesla opening up its Supercharger network to other brands it's no surprise that the new modules would support exactly that capacity. Note that no Tesla currently sold can charge at 350 kW, but the upcoming Cybertruck will be a different story.
The new V4 Supercharger has a more minimalist design than its predecessor, as well as a longer cable.