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Combined Charging System (CCS): Key to Fast EV Charging Solutions

Feb 20, 2025

Worldwide, we have been witnessing a huge uptake in the use of electric vehicles (EVs) over the past few years. Governments and industries are investing heavily in sustainable mobility, accelerating the need for efficient EV charging infrastructure. One of the most critical components of this infrastructure is the Combined Charging System (CCS), a widely adopted charging standard that ensures fast and seamless charging for electric vehicles. In this blog, we explore what CCS is, how CCS charging works, and why CCS testing is essential.

What is the Combined Charging System (CCS)?

The Combined Charging System (CCS) is a standardized EV charging infrastructure used predominantly in Europe and North America. Most electric cars can be charged using this system. When we talk about CCS, we are referring to both the hardware (such as type of plug) and the software (the type of communication protocol).
While CCS is widely used, other charging standards also exist, including:
  • CHAdeMO – Primarily for Japanese car brands
  • GB/T – Used in the Chinese market
  • Tesla – Exclusive to Tesla vehicles
Many public charging stations in Europe support both CCS and CHAdeMO, ensuring compatibility for different EV charging standards.

How does CCS Charging Work?

One of the key aspects of the Combined Charging System is its high EV charging capacity. Charging speed is crucial, especially for stations along highways where rapid charging is required. CCS supports fast charging through direct current (DC), which significantly reduces charging times compared to standard AC charging.
  • Low charging capacity: Suitable for home charging, but too slow for long trips.
  • High charging capacity (DC fast charging): Enables quick charging at public stations, reducing waiting times for drivers.
With more fast-charging stations being deployed, CCS ensures electric vehicle drivers can travel long distances with minimal downtime.
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Why is Combined Charging System Testing important?

Testing is extremely important for all charging stations. In this way, only products that are both safe and meet the standards can be sold. In addition to safety, it is important that charging stations are tested for interoperability with CCS. This ensures a seamless connection between car and charging station. A testing laboratory such as DEKRA can perform CCS compliance testing. CCS testing has the following advantages:
  • Certificate: You will be able to sell your product internationally.
  • Trust: This safeguards both the safety of the charging stations and of the users.
  • Compliance: Comprehensive testing helps demonstrate that your products meet the current standards.

Charging Interface Initiative (CharIN) and CCS

CharIN is the organisation that oversees the Combined Charging System (CCS). CCS is the European standard EV charging connector based on direct current (DC). Fast chargers use DC and have a CCS connector or a CHAdeMO connector. CHAdeMO is the Japanese standard and is therefore widely used in Japanese cars. Most charging stations in Europe have a CCS connector and a CHAdeMO connector. A CCS plug allows charging with alternating current (AC) or DC using the same connector.

CharIN certification with DEKRA

DEKRA was among the first certification bodies to be accredited for CharIN certification in 2021 alongside Korea's KERI. CharIN certification confirms compliance with the CCS standard. At our DEKRA laboratory in Arnhem, we provide comprehensive CCS testing services. After testing, our experts will report their findings and let you know whether you qualify for CharIN certification. The testing report will spell out any deficiencies, so you can take targeted remedial action. Following retesting of certain aspects, certification can then be obtained.
The future of EV charging relies on standardized, efficient, and safe charging infrastructure. The Combined Charging System (CCS) plays a crucial role in meeting the growing demand for fast and reliable electric vehicle charging. Through rigorous CCS testing, manufacturers can ensure that their charging stations meet global safety and interoperability standards, paving the way for a seamless EV charging experience worldwide.
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