Method for monitoring and optimizing the operation of a terminal for charging an electric vehicle, said terminal having connection means that are capable of being connected to a vehicle for an electric charging operation and for conversing by means of a signal transmitted on a control wire, said method consisting in: - generating an "output" voltage equal to a first DC voltage value; - connecting an electric vehicle to the charging terminal, the "output" voltage changing from the first DC voltage value to a second DC voltage value; - checking the aptitude of said terminal for charging; - authorizing charging of the electric vehicle by modulating the "output" voltage between a positive value equal to the second voltage value and a negative value equal to the opposite of the first voltage value (-V1), the modulation of PWM type having a duty cycle that is fixed according to an authorized maximum charging current (I max); - checking the aptitude of the electric vehicle to be recharged by monitoring a positive value of the modulated "output" voltage, said positive "output" voltage changing from the second voltage value to a third voltage value when said vehicle is apt; - supplying what is known as a "charging" voltage to said vehicle by modulating the "output" voltage between a positive value equal to the third voltage value and a negative value equal to the opposite of the first voltage value (-V1), the duty cycle of the modulation allowing the maximum charging current to be fixed at a first value (I max1); characterized in that the method consists in: - initializing a first timer (timer#1) concomitantly with the authorization of charging of the vehicle; - noting a first diagnostic time that has elapsed between: - the initialization of the first timer (timer#1) and - the changing of the "output" voltage from the second voltage value to a third voltage value; - comparing the value of the first diagnostic time with "standard" values recorded in a database; - determining a type of charger for the electric vehicle according to a comparative state between said first diagnostic time and the "standard" values; - taking into account the characteristics of the charger identified for the electric vehicle in order to optimize energy management locally. - generating an "output" voltage equal to a first DC voltage value; - connecting an electric vehicle to the charging terminal, the "output" voltage changing from the first DC voltage value to a second DC voltage value; - checking the aptitude of said terminal for charging; - authorizing charging of the electric vehicle by modulating the "output" voltage between a positive value equal to the second voltage value and a negative value equal to the opposite of the first voltage value (-V1), the modulation of PWM type having a duty cycle that is fixed according to an authorized maximum charging current (I max); - checking the aptitude of the electric vehicle to be recharged by monitoring a positive value of the modulated "output" voltage, said positive "output" voltage changing from the second voltage value to a third voltage value when said vehicle is apt; - supplying what is known as a "charging" voltage to said vehicle by modulating the "output" voltage between a positive value equal to the third voltage value and a negative value equal to the opposite of the first voltage value (-V1), the duty cycle of the modulation allowing the maximum charging current to be fixed at a first value (I max1); - initializing a first timer (timer#1) concomitantly with the authorization of charging of the vehicle; - noting a first diagnostic time that has elapsed between: - the initialization of the first timer (timer#1) and - the changing of the "output" voltage from the second voltage value to a third voltage value; - the initialization of the first timer (timer#1) and - the changing of the "output" voltage from the second voltage value to a third voltage value; - comparing the value of the first diagnostic time with "standard" values recorded in a database; - determining a type of charger for the electric vehicle according to a comparative state between said first diagnostic time and the "standard" values; - taking into account the characteristics of the charger identified for the electric vehicle in order to optimize energy management locally.