The study examined how EV growth in the western United States will impact the regional electric grid by 2035. If current trends persist, with the majority of charging occurring at home overnight, peak electricity demand could surge by up to 25%. This increase would necessitate significant investments in new generation and storage capacity, likely involving natural gas—a counterproductive measure for decarbonization efforts. Optimizing the placement of public charging stations has been a focus of research, but long-term solutions require accurate modeling of charging behaviors, including where, when, and how frequently drivers charge their vehicles.