First of all, the fast charging and slow charging interfaces of electric vehicles correspond to the DC and AC interfaces, and the DC is fast charging and AC is slow charging. In general, there are 5 ports for fast charging and 7 ports for slow charging. In addition, fast charging and slow charging can also be seen from the charging cable, and the charging cable for fast charging is relatively thicker. Of course, some electric vehicles manufacturers have only one charging mode due to various considerations such as cost and battery capacity, so there will only be one charging port.Fast charging is what we called DC charging. Generally speaking, the DC voltage of fast charging will be greater than the battery voltage. Generally, 80% of the capacity can be reached in half an hour, while slow charging takes a long time, and it may take more than six hours to fully charge the battery. At the current level of technology, although the battery can charge the battery to 80% within 30 minutes, the remaining 20% must reduce the current to limit the charging power to ensure battery safety and life. Because fast charging stores direct current directly into the battery, the requirements for fast charging on the battery are very high. The power of direct current is very large. During charging, electrons are accelerated to flow from the positive electrode to the negative electrode. Therefore, long-term or frequent fast charging will cause Causes the temperature of the battery pack to rise, and the battery decays faster.The charging process is that the electrons inside the battery move from the positive electrode to the negative electrode. In the fast charging mode, the flow rate of the electrons increases, which may cause the battery to heat up too fast, which may not be able to charge in a balanced manner, which is also common when we usually charge mobile phones. The "virtual battery", and fast charging will reduce the life of the battery because it causes a certain burden on the battery.The slow charge uses alternating current, and the current and power are relatively small. Although the charging time will be longer, it has a good guarantee for the life of the battery and the electricity cost will be relatively low. However, fast charging does not necessarily cause serious damage to the battery. After all, most battery factories will be equipped with a battery management system when developing a battery system, which will be provided to everyone when the battery is safe. The charging current and power of slow charging are relatively small, and the battery life is better, and the charging cost is low when the power consumption is low.The charging speed of an electric car is closely related to the power of the charger, the charging characteristics of the battery and the temperature, but it is important to remember that no matter how perfect the battery is, the long-term fast charging will eventually affect the service life of the battery. You don’t need to worry too much about the occasional fast charge.Under the current battery technology level, it takes 30 minutes to charge to 80% of the battery capacity even if it is fast charging. After 80% is exceeded, the charging current must be reduced to 100% to protect the battery safety. The time will be longer.

FaultFault symptoms&possible causesTroubleshooting solutions  AC Over-voltage  AC input voltage is too high1. If the voltage exceeds 264Vac for a short time, wait for the grid to return to the normal voltage range by itself.2. Check the background monitoring data and analyze it. If the voltage in this area is over-voltage for a long time, you can increase the input over-voltage protection point through the configuration software, up to 300Vac.3. If the fault cannot be eliminated, please contact us.  AC Under-voltage  AC input voltage is too low1. If the voltage is lower than 140Vac for a short time, wait for the grid to return to the normal voltage range by itself.2. Check the background monitoring data and analyze it. If the voltage in this area is under-voltage for a long time, you can increase the input under-voltage protection point through the configuration software. The minimum can be 140Vac.3.If the fault cannot be eliminated, please contact us.   AC Over-current  AC input current is too large1. Disconnect the leakage/over-current protection circuit breaker of the distribution box immediately2. Check whether there is low impedance or short circuit between the two wires of the AC EV Charger output line.3. If the fault cannot be eliminated, please contact us.  AC Over frequency  AC input frequency is too high1. If the frequency exceeds 55HZ for a short time, wait for the network to return to the normal frequency range by itself.2. Check the input voltage frequency in the background monitoring data. If it is too high for a long time, please contact the power supply department for processing.    AC Under frequency  AC input frequency is too   low1. If the frequency is lower than 45HZ for a short time, wait for the waiting network to return to the normal voltage range by itself.2. Check the background monitoring data and analyze it. If the frequency in this area is over-frequency for a long time, you can increase the input over-frequency protection point through the configuration software, which can be as low as 40Hz.3. If the fault cannot be eliminated, please contact us.   Over-temperature Over-temperature of inside of AC Charging Station 1. Check the installation environment of the AC pile, check whether there are other heating devices nearby, and ensure that the ambient temperature is below 60°.2. If the fault cannot be eliminated, please contact us.  Leakage current  The earth leakage current is too high1. Disconnect the leakage/over-current protection switch of the distribution box immediately.2. Check whether the output wire of the AC pile is damaged or has low impedance or short circuit to the ground3. If the fault cannot be eliminated, please contact us.  Earth faultThe input/output improperly grounded or the input L/N is inversely connected 1. Disconnect the leakage/over-current protection switch of the distribution box immediately. 2. Check whether the input/output wire of the AC charging station is properly grounded, and whether the input L/N is connected in the normal order.3. If the fault cannot be eliminated, please contact us.Abnormal communication (networking mode)The communication is not good of background of AC Charging Station1. Check whether the connection of the network cable is correct and reliable.2. Check whether the EV charging station configuration is correct in the background.3. If the fault cannot be eliminated, please contact us.Charging gun improperly connected The abnormal connection of charging gun1. Check whether the connection of the EV charging cable is correct and reliable.2. If the fault cannot be eliminated, please contact us.