As of October 2018, one million plug-in vehicles (PEV) have been sold in the United States, according to the US Department of Energy (DOE).
PEV sales began in December 2010 with sales of the Nissan Leaf and Chevrolet Volt. Other PEV models followed, but PEV sales remained below 5,000 per month until September 2012.
Cumulative PEV sales reached 500,000 in September 2016. Sales have been greater than 20,000 per month since May 2018, with the highest being 45,000 in September 2018.