May be a manufacturers requirement, but it does not make sense to me. I don't know why everyone makes a big deal about EV charging stations, I mean its just a load or an appliance, right. Read instructions, install per NEC, cash check, repeat.
A lot of people on here installed red boxes, etc. last year, did they have to have Red Box certification?
I can attest, however, that I have tried to get EV charger info. from the manufacturers and they are very reluctant to speak with you, they do sam to have their preferred installers in a make shift sales territory around here.
My reply is not intended to be negative, just my thinking.