One of the most important features of an electric bus (E-bus) is the ability to recover electricity generated during the braking and deceleration phase of the vehicle’s movement. The specificity of the bus operation in urban transport is reflected in the dynamic mode of vehicle’s operation, especially in terms of frequency and intensity of acceleration and braking. Recovered electricity during the braking and deceleration phase of E-bus drive is determined by the performance of the drive electric motor, the strategy choice (algorithm) for regenerative braking control, driving cycle, terrain configuration, the ability of the supercapacitor to receive as much electricity as possible and the driving style of the driver. The researches of the electricity recovered on the EKO 1 line was performed in 2018 and 2019. The time of year has been chosen when heating and air-conditioning systems were not used or minimally used only in certain periods of the day, in order to more realistically look at the effect of the achieved recovery and the impact on the energy efficiency of the E-bus. The measured values of the supercapacitor voltage, the discharge and recuperation current of the supercapacitor and the SOC (State of Charge) values were taken from the SD memory card BMS (Battery Management System) of the control unit that performs data acquisition from the V-CAN of the E-bus. The value of the recovered electricity, under the assumption that the regenerative braking system is used correctly, is mostly affected by the terrain configuration, i.e. the presence of inclined sections.