[ndc55]

are there so many? I know of: ChaDeMo - Japan; GBT - China; Type2 - EU; Type1 - US; Tesla - US.

Type1 and Type2 have the same signalling so they're compatible via adapters (you can import EU/US-only EVs to either region and they can be charged with adapters).

You can find some Chademos around EU and US due to the popularity of the old Nissan Leaf. Tesla uses Type 2 in the EU as do all other manufacturers, including Nissan with their new EVs.

In the EU Type2 is mandated since 2015 on all newly homologated EVs. In the US Type1 is recommended by the SAE since 2009. Early EVs imported to the EU had Type1. No such mandate in the US for using Type1, but Tesla is the only outlier which chooses to use another standard. Tesla has adapters to use on ChaDeMo and Type1 so, little issues there. Idk about the regulations in China and Japan.

Do you know of more plugs/sockets that are in use in the US and EU?