I do not hear anyone else talking about this, but the real solution is On The Move Charging. Electrical pickups for this have been around for more than a hundred years (Think electric buses, trollys, and rail locomotives. First I would propose that EV and Hybrid vehicle manufactures agree on charging rates and a standard pickup assembly that could be bolted under or at the rear bumper of these vehicles. Second, build the infrastructure for road bed, overhead, or (I like this the best) guard rail mounted electrical feeds. I think that a right hand or dedicated toll lane (think rear view mirror mounted ID packs) would, once authenticated, deploy your vehicle pickup for an arbitrary number of miles of charging. So for an EV with a range of 100 miles for two cities, 200 miles apart, they would need one or two charging sections of roadway between these two destinations. No trailer, no gasoline. Any EV (or Hybrid who wants to save gas) could use this lane. An autopilot that takes control of your vehicle in the charging lane would be a nice touch. This is all old technology. Automakers always make more profit on options so they should love this. The bolt on pickup would only have electrical connections, electronic connections to the cars computer and some pivot points and/or an electric or hydraulic cylinder to deploy and the rest is electronics with a couple of replaceable contact pads. A continuing source of income for the dealerships! Too poor to buy the pickup? The other side of the rail would be a great place to locate stationary plug in charging stations. But then what do I know? I am just an out of work engineer. Electric freight trucks are in the works. Up hill grades would be great locations for electrical power feeds for trucks. No interchangeable battery packs and no generators needed. Neat!