Common Reasons Why the Charging Current May Be Lower Than the Maximum ？

Several factors can cause the actual charging current to be slightly lower than the charger's rated maximum. Here are the most common ones:

1. Vehicle Charging Capability

Not all electric vehicles can accept the full 32A. Some onboard chargers are rated for 30A, 28A, or another value below the charger's maximum. The vehicle will automatically limit the current to what it can safely handle.

2. Battery State of Charge

As the battery gets closer to full, many vehicles reduce the charging current to protect battery health. This is especially common after the battery reaches 80% or higher.

3. Battery Temperature

If the battery is too hot or too cold, the vehicle's battery management system may reduce the charging current to prevent damage and maintain safety.

4. Voltage Fluctuations

The actual power delivered also depends on the supply voltage. If the voltage from the grid is slightly higher or lower than the standard value, the current may vary slightly while the overall power remains stable.

5. Cable and Connection Resistance

Minor losses in the charging cable and connectors can also affect the measured current. A slightly lower reading is not necessarily a sign of a problem.

Is 28A Instead of 32A a Problem?

In most cases, no. A reading of 28A on a 32A charger is well within normal operating variation. The difference is small and usually caused by the vehicle's own charging management rather than a fault with the charger.

If the charging session completes successfully and the vehicle reaches its target state of charge, there is typically nothing to worry about.

When Should You Be Concerned?

You may want to investigate further if:

• The charging current is significantly lower than expected (for example, below 16A on a 32A charger) without an obvious reason.
• The charging speed has suddenly dropped compared to previous sessions under similar conditions.
• The charger or cable becomes unusually hot during charging.
• The charging session frequently interrupts or fails to complete.

If you notice any of these signs, contact customer service for further troubleshooting.

Conclusion

Owning a 32A charger does not mean your vehicle will always charge at exactly 32A. The charging station provides up to 32A, but the actual current is drawn by the vehicle based on its needs, battery condition, and other factors. A reading of 28A is usually normal and not a cause for concern.