What Is an EV Charging Connector?
An EV charging connector is the physical plug and socket interface that transfers electrical energy — and increasingly, digital data — between charging infrastructure and an electric vehicle. Unlike the fuel nozzles of petrol stations, which vary only in diameter, EV connectors differ in pin layout, communication protocol, current type and maximum power rating. For anyone planning charging infrastructure, understanding these differences is not optional trivia: the connectors your chargers offer directly determine which vehicles can use your site, in which markets your hardware can be sold, and how future-proof your investment will be.
Broadly, connectors divide into two families. AC connectors deliver alternating current from the grid to the vehicle's onboard charger, typically at 7–43 kW. DC connectors deliver direct current from an off-board charger straight to the battery, enabling the 60–480 kW speeds that highway and fleet users expect. The same charging station can support several connector types — a common configuration on modern 120–180 kW DC charging stations pairs a CCS2 cable with a CHAdeMO cable on a single dispenser.
Connector type ≠ charging speed by itself. A Type 2 socket can deliver 11 kW or 43 kW depending on the supply; a CCS2 cable can carry 50 kW or 350 kW depending on the power electronics behind it. The connector defines the ceiling, the charger defines the actual output.
AC Charging Connectors: Type 1, Type 2 and GB/T AC
AC charging is the workhorse of destination and workplace infrastructure. Because it uses the vehicle's onboard charger to convert AC to DC, AC hardware is simpler, cheaper and ideal for the hours a vehicle is parked anyway — exactly the profile of wallbox and AC charger deployments at offices, retail sites and fleet depots.
Type 2 deserves particular attention. Mandated by the EU as the standard AC inlet since 2014, it supports single- and three-phase charging through the same plug, which is why a single Type 2 wallbox can serve everything from a plug-in hybrid drawing 3.7 kW to a commercial van pulling 22 kW. For operators, a Type 2 socket (rather than a fixed cable) also lets drivers bring their own lead — useful in mixed-vehicle locations.
DC Charging Connectors: CCS, CHAdeMO, GB/T DC and NACS
DC fast charging bypasses the onboard charger entirely, feeding the battery directly. That demands thicker conductors, active cooling at high currents and a high-power communication link that negotiates current and voltage with the battery management system in real time. Four connector families dominate:
- CCS2 (Combined Charging System, Type 2 base) — the de facto DC standard across Europe, the Middle East, Australasia and much of Asia. It extends the Type 2 plug with two extra DC pins, so one inlet handles AC and DC. Maximum practical currents now reach 500 A with liquid-cooled cables.
- CCS1 (Type 1 base) — the North American DC standard, now being displaced by NACS on new vehicles.
- CHAdeMO — a robust Japanese-origin DC protocol still carried by significant vehicle fleets across Japan, and by many vehicles in European and Southeast Asian markets. Interoperability matters: chargers certified by the CHAdeMO Association, such as Gresgying's DC units holding CHAdeMO protocol certification, guarantee correct handshakes with these vehicles.
- GB/T DC — China's national DC standard, the largest single fast-charging market in the world by volume.
A fifth name, NACS (North American Charging Standard), is reshaping the North American landscape and is covered in detail below.
Connector Types at a Glance
The table below condenses the global connector landscape into the essentials infrastructure planners need:
One detail worth noting: CCS2 and NACS are physically compact compared with CHAdeMO, but the limiting factor at high power is not the plug geometry — it is heat. Above roughly 250 A, connectors need liquid cooling, which is why the HPC terminals of a 480 kW charging hub use actively cooled cables to sustain 500 A continuously.
Regional Standards: Planning for Where You Deploy
Connector strategy is regional strategy. Europe is the simplest case: Type 2 for AC and CCS2 for DC, both legally anchored in EU directives. North America is in transition — CCS1 infrastructure remains installed and revenue-generating, but virtually every major automaker has committed to NACS inlets on new models, so operators are specifying dual-standard dispensers. Japan pairs CHAdeMO with Type 1 AC. China runs its own GB/T ecosystem end to end.
Southeast Asia, the Middle East, Latin America and Africa typically follow European standards, which is why Gresgying's European-standard product range — showcased at events such as Power2drive in Germany — covers Type 2 and CCS2 as the default, with CHAdeMO and GB/T variants for specific markets. Real deployments reflect this mix: a Swiss transport-network partner runs Gresgying fast chargers under CCS2, while Malaysia's TNB network operates a 240 kW group charging hub serving mixed connector demand, and Iceland's network relies on 180 kW DC chargers with dual CCS2/CHAdeMO cables.
The NACS Transition: What Charging Operators Should Know
The North American Charging Standard — the connector popularised by a major EV manufacturer and donated to standardisation bodies as SAE J3400 — collapses AC and DC into a single compact interface. Its rise creates a practical planning question for anyone with North American sites: how to serve both CCS1 vehicles already on the road and the wave of NACS-native models arriving now.
The industry answer has converged on three moves: retrofit or specify dual-cable dispensers, use certified NACS-to-CCS1 adapters where approved, and write connector-flexible language into procurement contracts so hardware can be re-cabled rather than replaced. The same principle applies everywhere: buy the power electronics once, keep the connector layer adaptable.
How Connector Choice Shapes Charger Selection
Connector configuration affects hardware in three concrete ways:
- Single vs dual connector — a dual-cable DC dispenser serves two vehicles (or two standards) from one power cabinet. On a 60 kW DC charging station, dual connectors raise site utilisation without doubling grid connection costs.
- Socket vs fixed cable — AC wallboxes with a Type 2 socket accept whatever cable the driver carries; fixed-cable units are simpler for public use but lock you to one plug format.
- Cable cooling — connector ratings above ~250 A require liquid-cooled cable assemblies, which changes dispenser design, maintenance schedules and cost. Factor this in when choosing between a 150 kW and a 480 kW-class ultra-fast station.
If you are earlier in the decision process, the broader framework in our EV charger selection guide walks through power sizing, siting and software alongside connector choice.
Connectors vs Protocols: Where OCPP and ISO 15118 Fit
Connectors are the hardware layer; protocols are the conversation. Two protocol families matter to infrastructure buyers:
- Vehicle-to-charger communication — CCS2 and CHAdeMO use high-level communication (PLC or CAN) so the battery management system dictates current and voltage every few milliseconds. ISO 15118 builds on this to enable Plug & Charge, where the vehicle authenticates itself automatically the moment it is plugged in — no app, no card.
- Charger-to-network communication — OCPP links every dispenser to the charging management platform, regardless of connector type. A multi-standard site still reports, bills and updates as one system.
Membership of open standards bodies is a useful signal when choosing suppliers: Gresgying is a member of CHARIN e.V., the association driving CCS and Plug & Charge adoption worldwide.
Liquid-Cooled Cables and the Path to Megawatt Charging
Connector evolution is driven by one physical reality: more power through a cable means more heat. Air-cooled CCS2 assemblies reach practical limits around 350–500 A. Beyond that, liquid-cooled cables circulate coolant around the conductors, keeping plug surface temperatures safe while allowing slimmer, lighter cables that drivers can actually handle — essential for fast charging stations delivering peak session power.
The next horizon is the Megawatt Charging System (MCS), designed for heavy trucks, buses and maritime applications with targets beyond 1 MW and 3,000 A. Standards bodies have finalised the MCS connector interface, and manufacturers are already positioning: Gresgying has launched its own megawatt charging unit for the high-power e-mobility market. Operators building highway corridors today should specify power cabinets and grid connections that can accept MCS-class dispensers tomorrow.
Certification: Proof That Connectors Actually Work
A connector is only as good as its certification. Interoperability testing proves the charger completes a correct handshake with every compliant vehicle, not just the ones in the lab. Relevant credentials for European and international deployments include:
Gresgying's charging hardware carries these credentials — from CE certification through TÜV SÜD approval of the 120–180 kW DC charging station to PTB certification for 480 kW charging terminals.
Choosing the Right Connector Mix for Your Site
Use this quick decision framework when specifying new charging infrastructure:
- Europe, Middle East, Oceania: Type 2 AC + CCS2 DC as standard; add CHAdeMO cables where legacy or Japanese-market vehicles are common.
- North America: CCS1 today, dual-standard or NACS-capable dispensers for any new procurement.
- China: GB/T AC and GB/T DC across the board.
- Everywhere: prefer socketed AC units for flexibility, dual-connector DC dispensers for utilisation, and liquid-cooled cables above 250 A.
Then match connectors to dwell time: long-dwell locations (workplaces, retail, hotels) lean on AC Type 2 at 11–22 kW; short-dwell corridors and fleet hubs need CCS2 DC from 60 kW up to hub-scale architectures like the 480 kW charging hub host, whose power cabinet feeds multiple dispensers with dynamic allocation across connectors.
Why Gresgying for Multi-Standard Charging
Connectors seem like a small detail until a vehicle cannot plug in. Gresgying designs its charging hardware around real, mixed vehicle fleets: 30 kW DC chargers and hub-scale systems alike support the connector combinations each market demands, backed by CHAdeMO protocol certification, CHARIN membership and the full suite of European safety and metrology approvals. Deployments from Switzerland to Malaysia and Iceland demonstrate the same hardware family serving CCS2 and CHAdeMO vehicles on one network.
Plan your connector strategy with a manufacturer that speaks every standard
Tell us where you are deploying and which vehicles you serve. Gresgying's team will recommend the right connector mix, cable cooling class and certification package for your site — from a single wallbox to a 480 kW multi-standard hub.