Is it possible to charge one's Bolt from a portable generator? If so, what rated generator would one need for such? All this talk of hurricanes and long-term power outages got me to thinking about getting a generator "just in case" so I could keep the refrigerator and freezer cold, plus have a light or two so I don't break a toe in the dark. Then I got to wondering if it would be possible to use one to charge my Bolt. Thoughts?