This is a classic example of stupid science reporting. For decades now the classic diesel engine locomotive used in trains and the electric trains themselves are the largest electric vehicles of any kind. The Komatsu heavy truck is anything but accurate example of "World's largest electric vehicle".
https://en.wikipedia.org/wiki/Electric_locomotive
https://en.wikipedia.org/wiki/Diesel_locomotive
And by the way all Diesel Submarines and Ships are also electric drive trains.
https://en.wikipedia.org/wiki/Diesel%E2%80%93electric_transm...