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Can You Use a 22kW Cable on a 7kW Charger?

Can You Use a 22kW Cable on a 7kW Charger?

By James Fisher

In the world of electric vehicles (EVs), charging infrastructure is a crucial component that directly impacts the charging speed and efficiency. One common question that arises is whether it is possible to utilise a 22kW cable on a 7kW charger. In this article, we will delve deeper into this query and explore the implications it may have for EV owners.

Understanding EV Chargers and Cables

Before delving into the topic at hand, it is essential to understand the difference between EV chargers and cables. An EV charger, often referred to as a charging station, is the device that supplies power to your electric vehicle. On the other hand, the cable is the physical link that connects the EV charger to your EV’s charging port.

Charger and Cable Compatibility

Ideally, the charging cable and charger should be compatible with each other to ensure a safe and efficient charging process. In the case of the 22kW cable and 7kW charger, the primary concern is whether they are compatible in terms of power capabilities.

Power Capacity Difference

The power capacity of an EV charger is measured in kilowatts (kW) and indicates the maximum amount of power it can deliver to your EV. Similarly, the cable’s power capacity refers to the maximum load it can handle. In this scenario, the 7kW charger can supply 7 kilowatts of power, while the 22kW cable can handle up to 22 kilowatts.


Using a 22kW cable with a 7kW charger can have certain implications. Firstly, it is important to note that the charger determines the maximum power that can be drawn, not the cable. Thus, even if the cable can handle 22kW, the charger will only supply up to 7kW. Therefore, using a higher capacity cable with a lower capacity charger does not result in faster charging.

Safety Concerns

Using an over-capable cable does not necessarily pose a safety risk. However, it is crucial to consider the standards and guidelines set for EV charging. Utilizing a cable that exceeds the charger’s capabilities may violate industry standards and lead to potential safety hazards. To ensure safe charging, it is advisable to match the cable and charger’s power capacities.

Compatibility Considerations

When installing a charger, it is essential to select a charger and cable combination that align with your EV’s maximum charging capabilities. While a 22kW cable may provide flexibility for future upgrades or charging different EV models, it will not offer any significant benefits when used with a 7kW charger.

Adapting to Different Charging Scenarios

If you find yourself in a situation where you have a 22kW cable but only a 7kW charger available, there are a few options to consider. Firstly, you can use an adapter or convertor to match the cable’s power capacity to the charger. However, it is important to note that these adapters might not always be readily available and can introduce potential compatibility issues.

In conclusion, it is not advisable to use a 22kW cable with a 7kW charger. While it may be technically possible, it does not result in faster charging or any significant benefits. It is crucial to select a charging cable and charger combination that is compatible in terms of power capacity to ensure safe and efficient charging for your electric vehicle.

Written by James Fisher
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