FAQs for EV Charging

New EV owners are curious about the EV charging process when they are just starting. We’ve collected some of the most common questions and made a FAQ to help new owners quickly understand charging tips:



Q1. Can the air conditioning be turned on while charging?


Answer: Yes.

1. For some electric vehicles, the system must be turned off before charging. After starting the charging, the electric vehicles can be turned on to use the air conditioning.

2. Most newer vehicles do not require turning off the system. The air conditioning is not affected during charging and can be used continuously.


Q2. Does using the air conditioning during charging affect the battery?


Answer: It doesn’t affect the battery, but it does affect the charging speed slightly.

The air conditioning and the battery are connected in parallel during charging. A small part of the power is used for the air conditioning, while the majority is used for charging. Comparing the power distribution data in the figure above, it can be seen that using air conditioning during fast charging has a minimal effect on the charging speed. In contrast, it has a greater impact during slow charging.


Q3. Can I charge during rain, snow, or thunderstorms?


Answer: Yes.

1. The interface should be free of water or foreign objects before plugging in. Once plugged in, the interface is waterproof, so charging in rain or snow is completely fine.

2. Charging stations, chargers, power lines, and vehicles all have lightning protection designs, so charging during thunderstorms is also safe. For safety, people should stay in a more secure indoor area at this time.


Q4. Can I sleep in the car while it’s charging?


Answer: You can move around in the car, but it’s not advisable to sleep in it.

Due to current battery technology limitations, spontaneous combustion may still occur during EV charging. According to national standards, if the battery undergoes a thermal runaway, it will not catch fire or explode for 5 minutes, allowing occupants to evacuate. It’s strongly recommended not to sleep in the car while charging!


Q5. What’s the best remaining battery level to charge?


Answer: Maintaining the battery between 20% and 80% is optimal.

1. If the battery level drops below 20%, it’s time to recharge. If you have home charging, you can charge as needed. Slow charging every day doesn’t affect the battery.

2. A car is just a tool and can be driven when needed. Even driving until the battery reaches 0% won’t have a visible impact.

EV Wallbox

Q6. What’s the best battery charge level?


Answer: Slow EV charging to full at any level, and for fast charging, it’s best to charge to 80%–90%.

1. Slow EV charging at any level has no impact. Charging to full is best.

2. For fast EV charging, it’s best to charge to 80%–90%. Some fast chargers may automatically stop charging at around 95% to avoid overcharging.


Q7. Can you unplug the charger without stopping charging?


Answer: No, please follow the steps below to unplug the charger.

1. Fast chargers have a built-in lock, which activates during charging and releases when charging stops, allowing the charger to be unplugged.

2. Slow chargers do not have a lock, but the car’s slow charge interface has a lock. Generally, the slow charger needs the car door to be unlocked before unplugging.

3. During slow charging, first unlock the car door, then press the slow charge gun switch for a few seconds. The slow charger will automatically power off, and then the gun can be unplugged.

4. In case of an emergency (such as a leak current) or special circumstances (such as charging pile software or hardware failures that prevent charging from stopping), you can press the “emergency stop button” on the charging pile and then unplug the gun. When facing issues with a charging pile preventing charging, you can check if the emergency stop button has popped out. If you have pressed the emergency stop button in a special situation, please restore it in time to allow others to use the charging pile.


Q8. What should I do if the charging connector cannot be unplugged after stopping charging?


Answer: Repeat the operation a few times, and if it still doesn’t work, manually unlock it.

1. If the gun cannot be unplugged, repeat the normal process a few times, such as pushing in and pulling out forcefully, starting and then stopping charging again, or repeatedly locking and unlocking the car door.

2. If the above methods do not work for fast chargers, you can try to manually unlock them by following these steps:

  • a. Find and remove the plug from several locations indicated by arrows.
    b. Some charging connector heads come with a special small key or unlocking rope.
    c. Insert a screwdriver, small key, or small stick into the hole or pull the rope to unlock it.

3. Slow chargers can also be manually unlocked with an unlocking rope located near the slow charge interface in the car; pulling it will unlock them.

4. If none of the methods above work, you can contact the charging pile customer service to attempt remote unlocking, or maintenance personnel can solve it on-site. Please do not pull forcefully, as it may result in equipment or vehicle damage.

type 1 charging cable

Q9. Do electric cars or charging stations emit radiation?


Answer: They emit electromagnetic radiation, but it’s not harmful to humans.

1. Electromagnetic radiation is ubiquitous. The earth is a huge electromagnetic field, and sunlight and all household appliances emit electromagnetic radiation. As long as it is below a certain intensity, it is harmless to humans.
2. The country has strict standards for the electromagnetic radiation of various devices. Test data shows that the electromagnetic radiation intensity of electric vehicles is lower than that of common smartphones.
3. Only high-intensity electromagnetic radiation and ultra-high-frequency ionizing radiation are harmful to humans. It is necessary to maintain a distance to avoid excessive exposure, such as television transmission towers, large substations, X-ray equipment in hospitals, etc.

All the Miles EV chargers have passed the EMC test according to the IEC standard. So you can purchase with no worries.


To be continued…

Update cookies preferences
Scroll to Top