in which the vehicle reached the charging site will be explained below where the control processing shown in fig2 is started first an engine state recognition processing is conducted s 10 the processing of s 10 is executed by the determination unit 12 of a site allowing charging to determine whether the engine has been stopped or the vehicle is stopped in the charging site present site the determination unit 12 of a site allowing charging acquires the engine on off state which has been outputted by the engine control unit 34 via the information input unit 11 and determines whether the engine has been stopped alternatively the determination unit of a site allowing charging acquires the vehicle speed information which has been outputted by the vehicle speed sensor 31 via the information input unit 11 and determines whether the vehicle 3 has been stopped in the processing of s 10 a transition is made to soc determination processing s 12 when the vehicle 3 or the engine is determined to be stopped the processing of s 12 is executed by the determination unit 12 of a site allowing charging to determine whether the battery soc in the charging site has changed by a predetermined value or a larger value within a unit time the determination unit 12 of a site allowing charging acquires the battery soc at the charging site.