Society Of Automotive Engineers Defines EREV & PHEV
It’s unlikely that the EREV or PHEV battle will ever come to an end, but recently the Society Of Automotive Engineers provided a definition for both classes of vehicles in a paper title “Chevrolet Volt Electric Utilization.”
Here are the SAE-provided definitions:
E-REV: “A vehicle that functions as full-performance battery electric vehicle when energy is available from an onboard RESS [rechargeable energy storage system] and having an auxiliary energy supply that is only engaged when the RESS energy is not available.”
PHEV: “A hybrid vehicle with the ability to store and use off-board electrical energy in the RESS.”
So, where does the first-gen Volt fit in? Should the next-gen Volt be classified differently? BMW i3 REx? What classification does it get?