Vehicle and charging system

A charging system comprising:

• a vehicle comprises a power storage and the power storage is mounted on the vehicle;
• and
• a charging facility that supplies electric power to the power storage, wherein
• the charging facility transmits a first voltage value indicating a maximum outputtable voltage value of the charging facility to the vehicle, and
• when a second voltage value indicating a maximum voltage value of the power storage is larger than the first voltage value, the vehicle transmits to the charging facility, a third voltage value equal to or smaller than the first voltage value as a charging voltage upper limit value, wherein
• the vehicle transmits the second voltage value as the charging voltage upper limit value before the vehicle obtains the first voltage value,
• when the vehicle obtains the first voltage value and the second voltage value is larger than the first voltage value, the vehicle transmits a retry message, and
• after the vehicle transmits the retry message, the vehicle transmits again to the charging facility, the third voltage value as the charging voltage upper limit value, and
• when the first voltage value is equal to or larger than the charging voltage upper limit value received from the vehicle, the charging facility transmits a charger output readiness state message,
• when the first voltage value is smaller than the charging voltage upper limit value received from the vehicle and the charging facility receives the retry message, the charging facility transmits the first voltage value to the vehicle, and
• when the first voltage value is smaller than the charging voltage upper limit value received from the vehicle and when the charging facility does not receive the retry message, the charging facility transmits an error message to the vehicle.