As India’s EV ecosystem scales from early adoption to mass mobility, one problem is becoming impossible to ignore: fragmentation. Different charging apps. Different payment…
As India’s EV ecosystem scales from early adoption to mass mobility, one problem is becoming impossible to ignore: fragmentation.
Different charging apps. Different payment systems. Different charger networks. Different user experiences.
For EV drivers, charging often feels less like a connected ecosystem and more like navigating isolated islands.
This is where conversations around OCPP, OCPI, and UBC (Unified Bharat eCharge) have suddenly entered the spotlight.
But here’s the catch:
Most discussions frame them as competing standards.
They are not.
India’s public charging infrastructure is growing rapidly.
But interoperability has not kept pace.
Today, a typical EV user may need:
The result:
While Europe solved portions of this problem using roaming frameworks like OCPI, India’s market structure is fundamentally different:
This created the need for a new orchestration layer built specifically for India.
That layer is UBC (Unified Bharat eCharge).
This is the physical infrastructure:
Without this layer, nothing exists physically.
This is where OCPP operates.
OCPP defines how a charger communicates with its backend management system. It is the charger’s operating language.
Typical functions include:
Without OCPP, chargers become isolated “dumb boxes.”
This is where OCPI comes in.
OCPI enables:
It allows:
A user from Network A to charge on Network B.
However, OCPI usually requires bilateral agreements between operators.
That works relatively well in Europe.
It becomes difficult in India’s rapidly expanding multi-operator ecosystem.
This is where UBC sits.
UBC enables:
Built on the Beckn Protocol, UBC aims to create:
“One nation, one interoperable EV charging network.”
It is essentially the consumer-facing orchestration layer.
OCPP is the global communication standard between:
Developed by the Open Charge Alliance, OCPP has become the global charging protocol.
Without OCPP:
OCPP is foundational infrastructure.
It does not handle:
And that distinction is critical.
OCPI is a roaming and interoperability protocol.
It enables communication between:
Developed by the EVRoaming Foundation, OCPI powers many roaming ecosystems globally.
A driver using an OEM charging app can charge at another network’s charger because both networks exchange information through OCPI.
OCPI typically requires:
In a market with:
This creates enormous operational complexity.
UBC is India’s national EV charging interoperability framework built on the Beckn Foundation protocol architecture.
Its vision is simple:
Any EV user should be able to discover, book, and pay at any public charger through any participating app.
UBC is being positioned as:
Beckn enables decentralized open networks where:
can interact without centralized ownership.
That distinction matters enormously.
Here’s what actually happens during a charging session.
A user opens:
UBC helps discover nearby chargers.
UBC handles:
If the user belongs to another network:
OCPP now takes over.
The charger continuously communicates with its CSMS:
UBC facilitates:
The user never needs to switch apps.
India’s EV market has unique requirements:
A fragmented charging experience can slow EV adoption dramatically.
UBC’s strategic importance lies in:
For India, interoperability is not just convenience.
It is an infrastructure strategy.
India’s EV ecosystem is entering a new phase.
The conversation is no longer just about:
It is now about:
OCPP, OCPI, and UBC are not rivals fighting for relevance.
They are different layers of the same architecture.
And together, they could define the next generation of India’s EV infrastructure.
Originally published at https://www.zenergize.in/ocpp-ocpi-vs-ubc-india-ev-charging-interoperability/
Written by
Veer Karan Goyal
Co-Founder & CTO at Zenergize. IIT alumni. Power electronics engineer specialising in Silicon Carbide (SiC) MOSFET technology and EV charging infrastructure.
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