With the benefit of reduced exhaust emissions, electric vehicles provide a substitute for conventional vehicles. Nevertheless, the battery capacity of electric cars is still constrained, which limits their driving range. Technology has been created to increase the electric vehicle's restricted range in order to solve this issue. A range extender is a portable electrical generator that only kicks on when the battery runs low or is not fully charged. In this study, the working performance and effectiveness of the range extender are examined following modifications to the throttle and control system. The prototype, which is powered by a 3500-watt BLDC motor with a speed of approximately 3500 rpm and an operating voltage of approximately 48V to 60V, was used in two states of experimentation: no load and track load. The results demonstrate how the range extender vehicle's performance is impacted by the suggested throttle control system. The engine can deliver up to 3kW of power with the suggested throttle controller on the name plate. The system managed to deliver 2.93 kW of power without experiencing a major voltage loss or engine rpm while climbing a 2.1% sloped road. © 2024 IEEE.