What does AC mean?
AC (from the English “Alternating Current”) is the term for alternating current. This is the electricity that comes from the network and with which we operate our coffee machine or stovetops, for example. Alternating current (AC) is easier to produce and transport than, for example Direct current (DC).
Since our power grid uses alternating current, AC charging is also known as “normal charging.” Charging via DC, on the other hand, is usually called “fast charging.”
How does charging an e-car via alternating current (AC) work?
The battery of a e-cars can only process direct current. However, most charging stations charge with alternating current.
What is the difference between AC and DC charging?
Electric vehicles can be charged with alternating current (AC or “alternating current”) and direct current (DC or “direct current”).
For AC charging stations, the usual output power is 11-22 kWh and a full charge (i.e. when the battery is fully charged) takes several hours.
In DC charging stations, the alternating current (AC) from the power network is installed in the car by the “converter” and converted directly into direct current (DC). DC charging stations normally have a charging capacity of between 50-240 kW.
Benefits of AC charging
As with most batteries, a lower charging speed with a lower amperage can have a positive effect on battery life. In the case of an e-car, for example, a lifespan of around 8 years is realistic.
Charging with alternating current (AC) is also cheaper than charging with direct current (DC). However, charging takes much longer. So if you have time (for example while working) and can leave your electric car at one location for a longer period of time, you can save a lot of money.
Disadvantages of AC charging
Charging electric vehicles with direct current (DC), on the other hand, usually saves a lot of time. Charging e-cars with direct current (DC) is significantly faster than with alternating current (AC). So it can make sense to pay a higher price for a higher charging speed.
DC charging stations can often be found at locations such as motorway service stations, gas stations, supermarkets or even public utility and charging network operators.