What speed is an electric car most efficient?<br />The efficiency of an electric car can vary based on several factors, including its design, battery technology, driving conditions, and more. However, there is a general efficiency sweet spot for most electric cars, which is typically around 30 to 50 miles per hour (48 to 80 kilometers per hour).<br /><br />At this speed range, electric cars tend to achieve their best energy efficiency because they are operating in a relatively low-speed regime where aerodynamic drag is minimized, and they can take advantage of their electric drivetrain's efficiency characteristics. Additionally, the regenerative braking systems in electric cars can recapture more energy during deceleration at these moderate speeds.