A vehicle can achieve a reduction of laod of a storage battery device (105) and reduce a loss in connection with a charge/discharge of the storage battery device (105). In the vehicle, an engine output is equal to or less than an energy for driving a motor (107), or, the vehicle is driven without a charge of the storage battery device (105) from an engine (101) by way of controlling the engine output so as to be consumed all in a device except for the storage battery device (105).