To estimate the electric drive share of a PHEV of any particular range, EPA has relied on a study published by the Society of Automotive Engineers (SAE). In theory, drivers should rely more heavily on electricity the longer the electric range of a PHEV-they can go further before the battery runs out. To date, EPA has given PHEVs the benefit of the doubt both in consumer labeling and in regulation. Environmental Protection Agency (EPA) now plans to do something about it. As laid out in its proposed regulation for light- and medium-duty vehicles released on April 12, the U.S. The problem is that when drivers don’t plug in, a PHEV is just an extra-heavy gasoline car. These cars and SUVs are basically an electric vehicle and a gasoline vehicle in one, with both powertrains and the ability to switch fuels. Plug-in hybrid electric vehicles (PHEVs) may seem like the best of both worlds-they can run on electricity but won’t strand drivers if there’s nowhere to charge.
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