An electrical vehicle system with detachable power supply unit (EVDPU system) has at least two vehicles one of which is an electrical vehicle with detachable power supply unit (battery/batteries) and normally at least one vehicle has an aerial system readily retractable from the tram/trolley power supply network, which supplies driving power to all the vehicles via at lest one aerial connexion and intervehicular electricity transfer connexion system (except when an organic/non-electric fuel vehicle is used to drag an electric vehicle; the electric vehicle has all the necessaries for AC/DC intake and re-charge/discharge mechanisms, including invertor/convertor, regenerator, and electronic control and signal device: such electronic devices including speed/brake control, energy recovery/storage device and automatic shift switches and detachment attachment device. Energy recovery/storage device includes detachable solar panels.
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