The pusher has been built before. Is this one supposed to charge the EV while pushing it? Factory-built EVs will not allow externally charging while driving. As I've said before, I'm in favor of the pusher concept. Start your trip with fully charged batteries. Don't worry about range. Arrive at your destination at whatever state of discharge you desire. You get the benefits of a PHEV except you get to leave the ICE at home if you're knocking around locally.