I have wondered same thing, but have been unable to find a listing of my bike's electrical output. It would NOT surprize me if it has little extra for stuff, because bikes are shooting for small/compact/light all the time. Some day I will run across the info.
You could probably figure that it has at least enough wattage to cover an electric jacket and pants and look up the power requirements for those. If your extras didn't exceed the electric suit, you'd likely be fine.