My Employer says "Leave your ev at home or you go home!"

I drove my '72 super beetle to work last week for the first time and with the encouragement of my supervisor plugged it in to an outdoor outlet to recharge. I also parked in a ride share spot to better access the power outlet.

Well, I have been given a letter saying "bring it again and we send you home" saying they feel the car is unsafe, but they don't say why. It is a 72 volt system with 12 golf cart batteries. Not rocket science but they act like it's a bomb waiting to go off. My supervisor now says he never encouraged me to do anything... to my suprise.

Anyone one else ever have this problem? Oh, I work for a government agency that is supposed to be green!