CCS2 vs CHAdeMO in India 2026: Which DC Standard to Pick (and Why It Mostly Doesn't Matter Anymore)

Every founder building an EV charging network in India hits the same fork in week two: CCS2, CHAdeMO, or both? GB/T is on the list too if you've done your homework. Vendors push different answers depending on what they sell. AIS-138 is the standard everyone references and few have read. This is the version of the answer we've ended up giving so many times we figured we'd just publish it.

The 60-second answer

• CCS2 has won the Indian passenger-vehicle DC fast-charging market. As of 2026, all serious new 4W BEVs sold in India ship with CCS2 inlets — Tata, Mahindra, Hyundai, Kia, MG, BMW, Mercedes, Volvo, the lot.
• CHAdeMO is functionally dead for new installations in India. Nissan Leaf — the only meaningful CHAdeMO car ever sold in India — was discontinued years ago. Don't install CHAdeMO at a new site unless you have a specific contract reason.
• GB/T is the Chinese standard. Relevant only if you're servicing electric buses (BYD, JBM, Ashok Leyland Switch) or some Indian-made commercial e-LCVs — most depot charging for fleets uses GB/T.
• Bharat DC-001 is the older 15 kW standard tied to e-Tata-Tigor / Mahindra eVerito of the 2018-2020 era. Largely deprecated for new sites. Some legacy installations remain.
• Default for a new public 4W site in 2026: CCS2 only. For depot/commercial: GB/T + CCS2.

What AIS-138 actually says

AIS-138 is the Automotive Industry Standard issued by ARAI (the Automotive Research Association of India) that defines the physical and electrical requirements for EV charging inlets and connectors. Part 1 covers AC charging, Part 2 covers DC. It does NOT mandate a single connector — it adopts CCS2, CHAdeMO, and GB/T as permissible DC standards, plus Bharat DC-001. The market has converged on CCS2 not because AIS-138 forced it but because OEMs voted with their inlet designs.

If a vendor tells you a connector type is 'AIS-138 compliant', that statement is meaningful but doesn't pick the connector for you. All four standards above are AIS-138 compliant. The real question is which one the cars at your site will actually plug into.

Why CCS2 won (and CHAdeMO didn't)

Three things drove the Indian market to CCS2 between 2021 and 2024:

• European OEM dominance — Volkswagen, BMW, Mercedes, Volvo, Hyundai (Europe-aligned) all standardized on CCS2 globally and brought their EVs to India with CCS2 inlets
• Tata's CCS2 commitment — Tata Motors, the dominant Indian BEV seller (Nexon EV, Tigor EV, Punch EV, Curvv EV), went all-in on CCS2 from 2021. Once Tata committed, the network operators followed.
• Public policy alignment — FAME-II and most state EV policies subsidize CCS2-equipped sites preferentially. The economics tilted further with each policy iteration.

CHAdeMO never recovered from Nissan exiting India. There was simply no install base to justify the connector cost.

Power levels that actually matter

Connector type and power rating are independent decisions. CCS2 supports anything from 25 kW to 400 kW. The right rating depends on what your site is for:

• Highway corridor (NHAI, expressway): 120-180 kW per gun. Drivers want 80% in 25 minutes. Anything below 60 kW is a customer-experience disaster on a highway.
• Urban destination charger (mall, hotel, residential): 30-60 kW. Sweet spot of cost vs grid load. Drivers are doing something else for an hour anyway.
• Office / workplace fleet: 30-50 kW DC OR 22 kW AC Type 2. AC is often the better answer here — cheaper, simpler, lasts the workday.
• Commercial fleet depot (last-mile delivery, e-buses): 60-180 kW per gun, often with smart-charging profiles to spread load across 8-hour overnight charging windows.

The single most common site-design mistake we see is operators installing a 60 kW dual-gun CCS2 on a highway, then watching users complain when charging takes 50+ minutes. The hardware looks similar to a 180 kW unit; the experience is fundamentally different.

Should you install CHAdeMO 'just in case'?

We get this question a lot. The honest answer: no. The marginal cost of a CHAdeMO gun ranges from ₹2-5L per connector depending on the cabinet design. The number of CHAdeMO-only cars passing your site in 2026 is roughly zero. The number that will exist by 2028 is also roughly zero. Spend that capex on a second CCS2 gun and serve twice the throughput.

The only legitimate reason to install CHAdeMO in 2026: a B2B contract with a specific corporate customer that operates a CHAdeMO-equipped fleet (a few logistics fleets in Mumbai and Bangalore still run older Leafs as taxis or e-cabs). Even then, scope it to that single contract — not a strategic bet on the standard.

The GB/T question for commercial fleets

If your site serves Indian electric buses or Chinese-import commercial vehicles, GB/T becomes load-bearing. JBM, Olectra, Ashok Leyland Switch, BYD, and Tata e-buses all use GB/T DC connectors. The physical connector is different from CCS2; the protocol stack is also different (GB/T 27930 instead of DIN 70121 / ISO 15118).

A modern dual-output charger can ship CCS2 + GB/T from the same cabinet — the cost adder is moderate (₹1.5-3L per second connector type). For depot charging serving mixed 4W passenger + commercial fleet, dual-output is often the right call. For a pure passenger 4W site on a highway, skip GB/T.

OCPP, billing, and the layer above the connector

Whichever connector you install, the layer above it is OCPP — the open protocol that talks to your CSMS backend. Modern hardware (CCS2, CHAdeMO, GB/T) all speak OCPP 1.6-J or 2.0.1 to the operator's backend. The connector is a hardware decision; OCPP is a software decision. They are independent.

What we recommend at a new Indian site

• Public urban site (mall, hotel, residential parking): 2-4 CCS2 guns at 30-60 kW each. Skip CHAdeMO and GB/T. Add 2-4 AC Type 2 ports for long-dwell vehicles.
• Highway corridor site: 2-6 CCS2 guns at 120-180 kW each. Solar canopy if grid sanctioning is slow. Backup grid + battery if you want to be the highway operator everyone recommends.
• Commercial fleet depot: dual-output CCS2 + GB/T cabinets at 60-180 kW. Smart charging profiles. Time-of-use tariff awareness baked into the site controller.
• Workplace charging: 80% AC Type 2 at 22 kW + 20% DC CCS2 at 30 kW. AC is much cheaper and matches the dwell time of office workers.

What changes by 2028

Two trends to watch. ISO 15118 plug-and-charge is slowly becoming relevant — it lets a CCS2-equipped car authenticate the driver via a certificate exchange when it's plugged in, no card or app needed. Today this requires a certificate authority infrastructure that India largely doesn't have; by 2028 it should be commercially live with at least one CSMS supporting it. The connector hardware is unchanged; the firmware and CSMS need to support it.

MCS — the megawatt charging system that goes beyond CCS2's ~400 kW limit, used for electric trucks — is starting to appear in pilots in Europe and the US. By 2028 we expect 1-2 truck-charging corridors in India to deploy MCS. Not a connector to install today unless you're specifically building for the heavy-commercial-truck segment.

TL;DR

• Default install: CCS2 only. Skip CHAdeMO unless you have a specific contract.
• Power rating matters more than connector type — match it to the dwell pattern at your site.
• Add GB/T only for depot charging serving Indian e-buses or Chinese commercial vehicles.
• Spec OCPP 1.6-J at minimum for backend communication; plan a 2.0.1 upgrade path.
• Save your capex for more guns at the right power level, not for connector types nobody uses.