That's why I included an exhaust hose in my proposed "redneck Volt" design, to satisfy the lawyers' possible objection to poisoning the passengers with CO from my range-boost generator
OH - The charge plug could really use a built-in LED flashlight and charge indicator, too!
The first night I tried to charge the car, I was puzzled why the plug wouldn't mate to the socket. It was a pitch-black night, so I didn't notice that the rubber cover was still on the plug. I removed that, but I seemed to still have problems sticking it in, so I finally retrieved my flashlight from the glove box. I wasn't aware that it had an interior cover too.
Then after I got it all plugged in, I bumped my head on the open hatchback gate trying to see whether the little red charge indicator on the dashboard was lit or not (BTW, the steering wheel has to be turned at the precise angle, otherwise the concussion will be in vain)
To this day, I still also forget to flip the charge cover release under the dash when I get out of the car at night - every weeknight for the last three months. I may have to do some redneck engineering on the charge cover latch, so it can be opened from the outside, at which time 10w white LEDs blast the whole area with 1,000 lumens of light so I can see how to plug it in.
Then it needs some cool blue LEDs chasing around the charge port to indicate it's charging, so I won't get another concussion on the hatchback gate trying to see the little red charge indicator on the dashboard with the steering wheel turned at the wrong angle.