Due to their efficiency, plug-in electric vehicles (PEVs) reduce the amount of energy used by light-duty vehicles compared to their internal combustion engine counterparts. Estimates show that the energy savings in the United States due to light-duty PEVs in 2019 was 44.8 trillion Btu, up 47% from 2018. The reduction of energy use by plug-in electric vehicles translates to a savings of 470 million gallons of gasoline in 2019.
Notes: Gasoline conversion to Btu using gross heating value 125,000 Btu/gallon. Electricity conversion to Btu using 3,412 Btu/kWh.
Source: Argonne National Laboratory, Assessment of Light-Duty Plug-In Electric Vehicles in the United States, 2010 – 2019, June 2020.