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Evaluating Electric Vehicle Charging Impacts and Customer Charging Behaviors - Experiences from Six Smart Grid Investment Grant Projects

November 2014
U.S. Department of Energy Office of Electricity Delivery and Energy Reliability
Progress Energy Service Company, Duke Energy Business Services LLC, Indianapolis Power & Light Company, Sacramento Municipal Utility District, City of Burbank Water and Power, Madison Gas and Electric CompanyElectric Vehicles (EV), Interoperability Issues, Customer Systems, Demand Response, Pricing Program, Plug-in Electric Vehicle Charging Points, customer experience, Consumer Behavior Studies, Smart Grid Investment Grant Program, SGIG

The electric power industry expects a significant growth in plug-in electric vehicle sales by 2023, which may substantially increase electricity usage and peak demand in high-adoption areas. This report presents results from six Smart Grid Investment Grant (SGIG) projects that deployed in-home and/or public vehicle charging stations and assessed customer charging patterns. The utilities evaluated the technical performance of the charging systems, the potential grid impacts of charging during peak periods, and the potential need for distribution system upgrades and capacity additions to meet expected electricity demand growth from rising adoption of plug-in electric vehicles. As expected, project results showed negligible grid impacts from small-scale electric vehicle charging today, but gave utilities important insights into the demand growth and peak-period charging habits they can anticipate if electric vehicle adoption rises as expected over the next decade.