This paper presents a comprehensive analysis of regenerative braking in electric vehicles (EVs) with rear-wheel drive, with a focus on both series and parallel configurations. Regenerative braking is a critical technology that enhances energy efficiency by capturing kinetic energy during braking and converting it into electrical energy, which is subsequently stored in the vehicle’s battery. The study provides a comparative assessment of the performance and energy efficiency of vehicles equipped with regenerative braking systems versus those without, emphasizing variations in power consumption and driving range under diverse operational conditions. Additionally, the paper investigates the impact of different regenerative braking configurations series and parallel on overall vehicle performance, taking into consideration factors such as road conditions and traffic scenarios. The results highlight the pivotal role of regenerative braking in extending driving range and reducing energy consumption, while offering valuable insights into the benefits and trade-offs associated with series and parallel braking systems in rear-wheel-drive EVs.