240v 30A circuit breaker trips

Whenever I plug my charger into the car. The main question I have is that since the 240v plug for my Volvo XC-40 is a 14-50p, would using a 14-30 (dryer plug) to 14-50 converter be causing it? The drop was installed by a licensed electrician and rated for 240v @ 30A, and it runs my 240v homebrewing controller just fine.

EDIT 1: I'll reset the breaker and turn the car down to charge at 24A and report back.