When it comes to electric vehicle (EV) charging, many users may wonder why a 22kW charger can sometimes only provide 11kW of charging power. Understanding this phenomenon requires a more detailed examination of the factors that influence charging rates, including vehicle compatibility, charging infrastructure, and electrical specifications.
Oone of the main reasons why 22kW chargers can only charge at 11kW is the limitations of electric vehicles themselves. Not all electric vehicles are designed to accept the maximum charging power that a charger can provide. For example, if an electric car is equipped with an on-board charger (OBC) with a maximum capacity of 11kW, it will only consume that power regardless of the charger's capacity. This is a common situation with many electric cars, especially older models or those designed for urban commuting.
Second, the type of charging cable and connector used also affects the charging speed. Different electric vehicles may require specific types of connectors, and if the connection is not optimized for greater energy transfer, charging rates will be limited. For example, using a Type 2 connector on a vehicle that can only handle 11kW will limit charging power, even if the charger is rated at 22kW.
Another factor to consider is the electricity supply and infrastructure If the charging location has enough power will affect the charging rate. If the network or local power supply cannot support higher power levels, the charger can automatically reduce its output to prevent system overload. This is particularly important in residential areas or places with limited electrical infrastructure.
The battery’s state of charge (SoC) also affects the charging speed. Many electric vehicles employ a strategy of reducing the charging rate as the battery approaches its full capacity. This means that even with a 22kW charger, when the battery is close to full, the vehicle can only draw 11kW of power to protect the health and life of the battery.
A 22kW charger may only be able to charge at 11kW due to a number of factors, including the vehicle’s onboard charger capacity, the type of charging cable used, local power infrastructure and the battery’s state of charge. Understanding these elements can help electric vehicle owners make informed decisions about their charging options and optimize their charging experience. By understanding these limitations, users can better plan their charging times and ensure they get the most out of their 11kW EV charger.
