I’ve seen talk before about EVs with gas range-extenders as a possible design. But in a rough sense, we’re at that point with all the new PHEVs on the market. Usually they have 20-45 miles of all-electric range, and then have normal regeneration beyond that. I understand that the power/weight/efficiency trade offs of a PHEV are not the same as having a range extender, but I wonder whether it doesn’t matter, that the economies of scale of current PHEVs and iterative improvements will provide most of the benefit at lower cost.

A nice thing about current PHEVs is that they have smaller batteries than full EVs, which could matter in a battery-constrained market.