It's not that there is no concept of efficiency, it's that an electric car gets a free 2x reduction in emissions. And sure you can't use a normal plug very wel

It's not that there is no concept of efficiency, it's that an electric car gets a free 2x reduction in emissions. And sure you can't use a normal plug very well, whatever. Even without any amp increase, going up to 240 volts will let you charge up that commute and more.