Is it worth buying a charging station "with some extra capacity" for a future electric car?

The question of whether to choose a home charging station with more power capacity than is currently needed for their car comes up for many electric car owners as early as the purchase stage. The reasoning behind this is that while the car will eventually be replaced, the charging station may remain. So is this strategy worth the extra cost?

How Do Needs Change as an Electric Vehicle Ages?

Electric carts differ in terms of battery capacity, maximum charging current, and connector type:

• Budget models with small batteries can be conveniently charged using a 7-kW single-phase charging station;
• Premium-segment cars are capable of drawing 11 or even 22 kW from a three-phase connection.

If your current car isn't very power-hungry, but you're planning to get a more modern one next, the difference in charging speed will be quite noticeable. In Ukraine, you can Buy electric vehicle charging stations at soh.com.ua with power ratings ranging from 7 to 22 kW and varying sets of features and specifications. However, it’s important to understand that if an electric vehicle with a large battery is connected to a low-power charging station, it will take significantly longer to charge than the vehicle’s onboard charger allows.

It’s also important to consider the type of connector. The European market is primarily focused on Type 2; the American Type 1 standard is still found on some models; and cars from China use GB/T. Changing car brands may well mean a change in the charging standard, so even a high-power charging station with an incompatible connector will be useless without an adapter, which you’ll need to purchase separately.

What parameters should be set with a margin of safety?

If you're seriously considering upgrading to a more powerful car, it makes sense to focus on the following specifications:

• a three-phase 380-volt connection instead of a single-phase 220-volt connection, since it provides a power range from 11 to 22 kW;
• support for dynamic load balancing (DLB), which allows the station to automatically adjust consumption based on the total load in the building;
• The cable must be long enough to reach the connector in the new car;
• the presence of multi-level protection systems and automatic shutdown in the event of overloads and malfunctions;
• Wi-Fi and a mobile app for convenient remote charging control, regardless of the car model.

This set of specifications is not strictly tied to a specific vehicle and remains useful even when switching to a different brand or generation of electric car.

When Is a Power Reserve Justified, and When Isn't It?

Purchasing a charging station with extra capacity makes sense if you plan to replace your car within the next two to three years and the price difference between the base model and a more powerful model is small. For example, the price of a 7-kW single-phase model differs only slightly from that of an 11-kW three-phase model, but it completely eliminates the need for a future replacement purchase.

At the same time, if you’re not planning to buy your next electric car anytime soon, and there’s a significant price difference between charging station models, there’s no need to overpay in advance. The charging station’s power rating must always be compatible with your home’s electrical system. Therefore, installing a 22 kW three-phase unit without the appropriate wiring and a circuit breaker of the required quality is dangerous and impractical. In such a case, what was intended as a reserve for the future becomes a risk to safe operation.

It makes sense to choose a model with a higher power rating and a different connection type if you already have plans to buy a new car in the near future and the price difference between the models is small. If, however, replacing your car is a matter for the distant future, it makes more sense to choose a charging station that meets your car’s current needs and avoid overpaying for features that won’t be used for a long time. In this case, it makes more sense to focus on basic infrastructure that isn’t dependent on the model of your future car. An electrician can:

• create a reliable grounding circuit;
• run a power cable of the required cross-section;
• Install a circuit breaker with a power reserve.

This will make it possible to quickly assemble the station in the future without any additional construction work.