Abstract
California is home to approximately half of electric vehicles (EVs) in the United States, yet policymakers attempting to guide transportation electrification lack rigorous estimates of how much electricity these vehicles are using because the majority of charging occurs at home, where it is difficult to distinguish from other household uses recorded on the electricity meter. This brief highlights research findings from developing the first at-scale estimate of EV home charging. Previous estimates were based on conflicting surveys or extrapolated from a small, unrepresentative sample of households with dedicated EV meters. Research highlighted in this brief combined billions of hourly electricity meter measurements with address-level EV registration records from California households, including roughly 40,000 EV owners.
