A stationary charging system for charging a battery mounted in a vehicle with direct-current charging power generated from alternating-current input power, comprising: a power unit for generating the direct-current charging power from the alternating-current input power; a plurality of charging units that constitute the power unit; a control unit for controlling the charging units; and a CAN communication line (6, 7) for allowing data exchange between the control unit and the charging units, wherein the direct-current charging power is the sum of the output power provided by the charging units, the charging units being configured to conduct fault diagnosis on themselves to create charging unit status data concerning results of the fault diagnosis, and to transmit the charging unit status data to the control unit, and the control unit being configured to classify the charging units into a plurality of charging unit groups (4-1, 4-2, 4-3), each charging unit being part of only one charging unit group, and to change the output statuses of the charging units for each of the charging unit groups (4-1, 4-2, 4-3) upon reception of the charging unit status data indicative of a fault, such that the charging units that constitute the same charging unit group (4-1, 4-2, 4-3) are rendered into the same output status, wherein, when there is a fault in one of the charging units that constitute the same charging unit group (4-1, 4-2, 4-3), the control unit changes output statuses of the other charging units without a fault in the charging unit group (4-1, 4-2, 4-3) in accordance with the status of the charging unit with the fault, and the output state includes a state of halt in output and a state in which the output current value of the charging unit is decreased, wherein the alternating-current input power is three-phase alternating-current power, and the charging unit groups (4-1, 4-2, 4-3) each consist of any three of the charging units to which an arbitrary one of the three phases of the alternating-current power is inputted. a power unit for generating the direct-current charging power from the alternating-current input power; a plurality of charging units that constitute the power unit; a control unit for controlling the charging units; and a CAN communication line (6, 7) for allowing data exchange between the control unit and the charging units, wherein the direct-current charging power is the sum of the output power provided by the charging units, the charging units being configured to conduct fault diagnosis on themselves to create charging unit status data concerning results of the fault diagnosis, and to transmit the charging unit status data to the control unit, and the control unit being configured to classify the charging units into a plurality of charging unit groups (4-1, 4-2, 4-3), each charging unit being part of only one charging unit group, and to change the output statuses of the charging units for each of the charging unit groups (4-1, 4-2, 4-3) upon reception of the charging unit status data indicative of a fault, such that the charging units that constitute the same charging unit group (4-1, 4-2, 4-3) are rendered into the same output status, wherein, when there is a fault in one of the charging units that constitute the same charging unit group (4-1, 4-2, 4-3), the control unit changes output statuses of the other charging units without a fault in the charging unit group (4-1, 4-2, 4-3) in accordance with the status of the charging unit with the fault, and the output state includes a state of halt in output and a state in which the output current value of the charging unit is decreased, wherein the alternating-current input power is three-phase alternating-current power, and the charging unit groups (4-1, 4-2, 4-3) each consist of any three of the charging units to which an arbitrary one of the three phases of the alternating-current power is inputted.