Factors that Affect Level 2 AC EV Charging Speeds

The charging speed of a Level 2 AC charger is significantly faster than Level 1, but not as quick as Level 3 DC fast chargers, which are capable of delivering up to 80% charge in as little as 30 minutes. However, Level 2 chargers are more widely available and cost-effective than Level 3 chargers, making them a practical choice for most EV owners.

In general, the charging speed of a Level 2 AC charger is determined by two key factors: the charging station's power output, measured in kilowatts (kW), and the electric vehicle's onboard charger capacity, measured in kilowatts as well. The higher the power output of the charging station and the larger the onboard charger capacity of the EV, the faster the charging speed.

Example of Level 2 AC EV Charging Speed Calculation

For example, if a Level 2 charger has a power output of 7 kW and an electric vehicle's onboard charger has a capacity of 6.6 kW, the maximum charging speed will be limited to 6.6 kW. In this case, the EV owner can expect to gain around 25-30 miles of range per hour of charging.

On the other hand, if a Level 2 charger has a power output of 32 amps or 7.7 kW, and an EV has a 10 kW onboard charger capacity, the maximum charging speed will be 7.7 kW. In this scenario, the EV owner can expect to gain around 30-40 miles of range per hour of charging.

Practical Use of Level 2 AC EV Chargers

It's important to note that Level 2 AC chargers are not designed for rapid charging or long-distance travel, but rather for daily use and topping off the battery during extended stops. Additionally, some EVs may require adapters to connect to certain types of Level 2 chargers, depending on the charging connector type and the EV's onboard charger capacity.

In conclusion, Level 2 AC chargers provide a faster and more convenient way to charge electric vehicles than Level 1 chargers. The charging speed of a Level 2 AC charger depends on the charging station's power output and the electric vehicle's onboard charger capacity. While Level 2 chargers may not be suitable for long-distance travel or rapid charging, they are a practical and cost-effective option for daily use and extended stops.