Table of Contents
2. The Uptime Problem — Most Chargers Simply Don't Work
3. Connector Fragmentation — CCS2 vs GB/T and the Mess In Between
4. Grid Instability at High-Power DC Fast Chargers
5. The Business Model That Doesn't Work
6. FAME III and PM E-Drive — What the New Policy Framework Changes
9. References
1. The Promise vs the Reality
India's public EV charging network looks impressive on a map. By early 2025, the Bureau of Energy Efficiency (BEE) dashboard listed over 25,000 publicly accessible charging stations across the country — a number that has grown nearly five-fold since 2021. The government's stated target under PM E-Drive is one charging station every 25 km on national highways and one per grid of 3 km × 3 km in cities with populations above 100,000.
The problem is that the number of installed chargers and the number of working chargers are not the same number. And in India's public charging network, the gap between them is wide enough to strand a fleet.
Field surveys conducted by Primus Partners (2023), EV Reporter audits (2024), and the World Resources Institute India's charging accessibility study collectively tell the same story: between 30% and 60% of publicly installed AC and DC chargers across Tier-1 Indian cities are non-functional at any given time. In Tier-2 and highway corridor locations, that figure is worse.
This is not a story about insufficient ambition or inadequate investment. India has invested heavily in charging infrastructure. It is a story about what happens when infrastructure is built to a subsidy disbursement target rather than to an operational uptime standard — and about the specific technical, commercial, and regulatory failures that compound the problem.
2. The Uptime Problem
Uptime is the single most important metric for public charging infrastructure. It is also the metric that FAME II programme disbursements largely did not track.
The FAME II scheme funded the installation of public chargers through capital subsidies — typically ₹1–6 lakh per charging point depending on power level and connector type. Funds were disbursed on installation, not on continued operation. The perverse incentive this creates is not subtle: install the charger, collect the subsidy, leave the maintenance to whoever owns the site.
Why chargers fail
The failure modes in India's EVSE (Electric Vehicle Supply Equipment) fleet are well-documented and follow a consistent pattern:
Communication stack failures. Most Indian public chargers use the OCPP (Open Charge Point Protocol) 1.6 JSON backend to communicate with a central management system. When the network connection drops — and in India, 4G connectivity at highway petrol stations and parking structures is unreliable — the charger's OCPP session hangs. Many charger firmware versions do not implement a clean session timeout and reconnect sequence. The charger appears online on the operator's dashboard but will not initiate a new charging session for a vehicle that arrives. This is a software problem, not a hardware problem, and it requires no physical intervention to fix — only a firmware update and a reliable OTA update mechanism that most operators do not have deployed.
Power electronics degradation. DC fast chargers operating in India's ambient conditions — sustained temperatures above 40°C, humidity above 85% RH during monsoon, and dust ingress — experience accelerated component degradation. The IGBT modules in charger power stacks, the DC link capacitors, and the cooling fans are all sensitive to thermal cycling. A 60 kW DC charger running at 45°C ambient with a clogged air filter will derate progressively before it fails permanently. Most highway charger installations have no preventive maintenance contract — there is no scheduled filter cleaning, no thermal imaging of power cabinets, and no periodic insulation resistance testing.
Earthing and surge protection failures. India's grid has notoriously variable power quality, particularly in rural and peri-urban areas. Voltage transients during grid switching events, lightning-induced surges, and poor earthing at the installation site cause charger control boards to fail. Several charger manufacturers — particularly mid-tier domestic brands — do not install adequate surge protection devices (SPDs) at the charger input. A single monsoon season on an Indian highway can take out a significant fraction of an unprotected fleet.
Vandalism and physical damage. This is less an engineering problem and more an installation-design problem. Ground-mounted charging posts without cable management ducting, exposed connector holsters, and screens without anti-glare protection in direct sunlight — these design decisions produce chargers that physically degrade faster in India than in the controlled parking environments of European deployments.
The operator response gap
Even when a charger fails and the fault is diagnosed, repair response times in India average 5–14 days for non-metro locations, based on complaint data from ChargeZone, Tata Power EV, and EESL. A charger that fails on a highway corridor and takes two weeks to repair effectively removes that corridor location from the usable charging map for EV operators planning long-distance routes.
3. Connector Fragmentation
India's EV charging connector landscape is a fragmented mess that stems from two sequential policy failures and one geopolitical complication.
The standard mandated for public chargers in India under BEE guidelines is CCS2 (Combined Charging System, Type 2) for AC and DC fast charging, alongside Bharat AC-001 and Bharat DC-001 standards for lower-power applications targeting two- and three-wheelers. CCS2 is the dominant standard in Europe and is increasingly the global default for passenger and commercial EVs.
The complication is that a substantial fraction of EVs operating in India — particularly electric buses, a significant portion of electric three-wheelers, and all EVs with Chinese powertrain architectures — use GB/T connectors, the Chinese national standard. VECV's electric bus programmes, Tata's electric bus tenders with Chinese cell and powertrain suppliers, and the entire Olectra-BYD fleet use GB/T DC fast charging. These vehicles cannot use a CCS2 charger without an adapter — and compliant, safety-certified CCS2-to-GB/T adapters are not commercially available in India.
The result is a fleet segmentation problem:
Vehicle Type | Dominant DC Connector | Compatibility with Public EVSE |
|---|---|---|
Passenger cars (Tata, MG, Hyundai) | CCS2 | Good (where chargers work) |
Electric buses (Olectra-BYD, JBM) | GB/T | Limited; depot-only charging common |
Commercial LCVs (Tata Ace EV, Mahindra) | CCS2 / Bharat DC | Partial |
E-rickshaws, e-autos | Bharat AC-001 | Bharat-standard chargers scarce |
2-wheelers | Proprietary / Bharat AC | Near-zero public compatibility |
The GB/T problem is not going away. India's electric bus fleet — which is growing rapidly under PM E-Bus Sewa targets — is dominated by vehicles with Chinese drivetrain heritage. Requiring all of them to use depot charging is operationally limiting, particularly for intercity bus routes where opportunity charging at highway stops would meaningfully extend operational range. The policy fix — mandating dual-standard (CCS2 + GB/T) chargers at highway locations — is technically straightforward and has been recommended in multiple MoP working group reports, but has not been operationalised.
4. Grid Instability at High-Power DC Fast Chargers
Here is a problem that most charging infrastructure discussions in India skip over entirely: the grid cannot currently support widespread deployment of high-power DC fast charging without targeted reinforcement, and almost no one is planning for this systematically.
A 150 kW DC fast charger draws approximately 200 A at 415 V three-phase. A charging hub with 10 such chargers draws 2 MW. If all 10 chargers are simultaneously occupied — a realistic scenario at a busy highway dhabba during a long weekend — the hub presents a sudden 2 MW demand to a distribution transformer that was likely sized for a 100–200 kW feeder load.
The consequences of unmanaged high-power EVSE on Indian distribution feeders include:
Voltage depression. A 2 MW simultaneous load on a weak distribution feeder will depress the local bus voltage, potentially below the -10% DISCOM voltage tolerance threshold. Charger power electronics derate aggressively when input voltage falls — a 150 kW charger may deliver only 80–90 kW at 380 V input, increasing charge time and reducing user experience.
Harmonic injection. All DC fast chargers use an active front-end rectifier that introduces current harmonics into the grid. Without adequate filtering (IEEE 519-compliant Total Harmonic Distortion below 5%), adjacent sensitive loads — industrial motor drives, medical equipment — experience interference. DISCOMs in highway industrial corridors are beginning to report harmonic complaints from nearby facilities co-located with EV charging hubs.
Transformer overloading. Distribution transformers have a thermal time constant of roughly 2–4 hours. A charging hub that runs at 150% transformer rated capacity during a peak travel weekend will overheat the transformer core, accelerating insulation degradation. Transformer failure at a highway charging hub takes the entire hub offline until utility replacement — typically a 48–72 hour outage in rural areas.
The solution framework is well-understood — dedicated HT (high-tension) connections for large charging hubs, active power factor correction on all EVSE, load management via OCPP 2.0 smart charging profiles, and battery energy storage co-location to buffer peak demand. But none of these solutions are currently mandated in India's EVSE installation guidelines, and few operators implement them voluntarily because of the capital cost.
5. The Business Model That Doesn't Work
Public EV charging in India has a fundamental unit economics problem that no amount of subsidy has yet resolved.
A typical 60 kW DC fast charger in India costs ₹8–12 lakh installed, after FAME II subsidy. Operating costs include site lease (₹20,000–60,000/month on highways), electricity (variable tariff, ₹6–10/unit), OPEX staff, connectivity, and maintenance — approximately ₹1.5–2.5 lakh per month for a 4-charger hub. Revenue is generated per kWh dispensed, at typical retail rates of ₹15–25/unit.
To break even, the hub needs sufficient utilisation. The break-even utilisation for a mid-tier highway charging hub in India is approximately 15–20% average charger utilisation — meaning each charger must be actively charging for 3–5 hours out of every 24. As of 2024, most public charging stations in India are operating at 3–8% utilisation.
At 5% utilisation, a 4-charger hub generates roughly ₹40,000–60,000/month in revenue against ₹1.5–2.5 lakh in costs. The business case relies entirely on the assumption that utilisation will grow as the EV fleet grows — a reasonable long-run bet, but not a viable near-term operating model without external support.
The operators who are surviving are the ones who have moved away from a pure public charging play toward captive fleet charging (contracts with logistics operators, bus depots, cab aggregators) supplemented by public access. This hybrid model delivers predictable utilisation through fleet commitments and uses the public infrastructure as a utilisation top-up. It is not the original vision of an open-access public charging network — but it is what actually works in the current market.
6. FAME III and PM E-Drive
The FAME II programme (₹10,000 crore, 2019–2024) subsidised demand — EVs sold and chargers installed. Its successor framework, PM E-Drive (₹10,900 crore, FY2024–26), represents a meaningful philosophical shift.
PM E-Drive allocates approximately ₹2,000 crore specifically toward EV charging infrastructure — but critically, a portion is tied to operational performance metrics rather than pure installation. This is the most important structural change in India's charging policy since FAME II launched.
Key implications for the charging ecosystem:
E-bus charging infrastructure gets dedicated funding. ₹1,280 crore is earmarked for electric bus procurement (24,800 buses), with depot charging infrastructure bundled into the procurement contract. This directly addresses the GB/T problem for state transport undertakings — depot chargers can be specified to the bus fleet's connector standard without relying on the public network.
FAME III (expected to follow PM E-Drive, anticipated FY2026 onward) is widely expected to introduce minimum uptime SLAs for publicly funded charging infrastructure — a direct response to the FAME II utilisation failure. Operators who receive capital subsidy will be required to maintain minimum 90% uptime and report session data through a centralised OCPP backend to BEE. Non-compliance will trigger subsidy clawback provisions.
HT connection norms for large charging hubs are under active discussion between MoP and MNRE. Fast-tracking dedicated HT connections for charging hubs above 500 kW aggregate load — currently a 12–24 month process with DISCOMs — is a key ask from operators and appears likely to be addressed in FAME III implementation guidelines.
7. What Can Actually Fix It
The problems are real but not intractable. The fixes that would materially change India's public charging reliability within 24 months are specific and achievable:
Mandatory uptime SLAs tied to subsidy disbursement. This is the single highest-leverage policy change. The FAME II model of paying for installations is broken. Every subsequent programme must require operators to demonstrate 90%+ uptime over rolling 30-day windows, verified through OCPP session telemetry, as a condition of retaining subsidy. Several European programmes use this model successfully.
OCPP 2.0 mandatory for all new EVSE. OCPP 2.0 (versus the current OCPP 1.6 deployed on most Indian chargers) includes smart charging, V2G readiness, remote diagnostics, and improved session management. Mandating OCPP 2.0 compliance for all BEE-empanelled EVSE from 2026 onward would resolve the communication failure modes described above.
Dual-standard (CCS2 + GB/T) requirement at national highway locations. A regulatory amendment to BEE's EVSE guidelines requiring dual-standard charging posts at all NHAI highway charging locations. The cost increment per charger is ₹1.5–3 lakh — modest relative to total installation cost and transformative for the electric bus and commercial EV fleet.
Co-located BESS mandate for hubs above 500 kW. A Battery Energy Storage System sized to at least 30 minutes of peak hub demand co-located with large charging hubs would absorb demand peaks, reduce grid connection capacity requirements, and provide resilience during short grid outages. BESS costs in India have dropped to ₹25–35 lakh per 250 kWh — economically viable when spread over a 10-year hub operating life.
Dedicated DISCOM fast-track process for EV charging HT connections. A mandated 60-day maximum processing window for HT connection applications from charging operators, with deemed approval after 90 days. This alone would unlock dozens of stalled highway hub projects.
8. Engineer's Verdict
India's public EV charging problem is not an engineering problem at its core. The technology to build reliable, high-power, open-standard charging infrastructure exists and is commercially proven in Europe, China, and the US.
It is a systems integration failure: subsidy design that rewards installation over operation, regulatory fragmentation that allows multiple connector standards to coexist without interoperability mandates, grid planning that treats EV charging as an afterthought rather than a predictable load class, and a business model environment that makes the unit economics of public charging unworkable without fleet-contract anchors.
The good news is that each of these failures is correctable through specific, targeted policy and regulatory actions — none of which require inventing new technology or waiting for costs to fall further. The operators, the equipment, and the demand are all present. What is missing is the operational discipline and regulatory design to make the network work reliably.
India will build a national charging network. The question is whether it builds one that works.
9. References
1. Bureau of Energy Efficiency (BEE), India (2024). EV Charging Station Dashboard. Ministry of Power, Government of India. https://evyatra.beeindia.gov.in
2. Primus Partners (2023). "State of EV Charging Infrastructure in India: Utilisation, Uptime, and User Experience Survey." New Delhi.
3. World Resources Institute India (2024). "Charging Ahead: Accessibility and Reliability of Public EV Charging in Indian Cities." WRI India Ross Centre. https://www.wri.org/india
4. Ministry of Power, Government of India (2023). "Revised Consolidated Guidelines and Standards for Charging Infrastructure for Electric Vehicles." MoP Gazette Notification, January 2023.
5. Ministry of Heavy Industries (2024). "PM Electric Drive Revolution in Innovative Vehicle Enhancement (PM E-Drive) Scheme." MHI Press Release, September 2024.
6. FAME II Programme Guidelines (2019–2024). Department of Heavy Industry, Ministry of Heavy Industries. Government of India.
7. Open Charge Alliance (2022). OCPP 2.0.1 Specification. Open Charge Point Protocol, Version 2.0.1. https://www.openchargealliance.org
8. IEEE 519-2022. "IEEE Standard for Harmonic Control in Electric Power Systems." Institute of Electrical and Electronics Engineers.
9. NITI Aayog & Rocky Mountain Institute (2023). "Mobilising Finance for EVs in India: A Toolkit of Solutions." New Delhi.
10. ChargeZone India (2024). Annual Charging Network Report FY2023-24. Internal fleet operations data cited in EV Reporter, February 2024.
11. Central Electricity Authority (CEA), India (2023). "Study on Impact of Electric Vehicle Charging on Power Distribution Networks." Ministry of Power, New Delhi.
12. IEC 61851-1:2017. "Electric vehicle conductive charging system — Part 1: General requirements." International Electrotechnical Commission.
13. IEC 62196-3:2022. "Plugs, socket-outlets, vehicle connectors and vehicle inlets — Part 3: Dimensional compatibility requirements for DC and AC/DC pin and contact-tube vehicle couplers." International Electrotechnical Commission (defines CCS2 and GB/T physical standards).
14. Ministry of Road Transport and Highways (2023). "National Highway EV Charging Corridor Guidelines." NHAI-MoRTH Joint Advisory. Government of India.
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