2025 has been a year with many OCPI upgrades and essential partners backing up OCPI. Find out more about how the launch of OCPI 2.3.0, OCPI 3.0, and the OCPI Booking Module, and Hubject joining the EVRoaming Foundation have lifted OCPI to a new level.
In September 2025, Hubject, the world's largest EV roaming hub, made an announcement that reverberated through the charging industry. After years of operating its own proprietary protocol, Hubject joined as a Full Contributor and committed to native OCPI support across its intercharge platform, which connects over 1 million charging points across 70+ countries.
The significance was immediately clear: all major EV roaming hubs worldwide would align to OCPI.
But Hubject's announcement wasn't an isolated event; it was the visible peak of a much larger shift that had been building throughout 2025. From regulatory mandates to technical breakthroughs to industry-wide partnerships, 2025 became the year when OCPI moved from a promising open protocol to the definitive industry standard for EV charging interoperability. Let us explain.
The technical foundation: OCPI matures
2025 has brought us plenty of interesting OCPI improvements. We will explore the most significant updates of the year: OCPI version 2.3.0, the OCPI Booking Module and OCPI 3.0.
The launch of OCPI version 2.3.0
The year began with a significant protocol update. In February 2025, the EVRoaming Foundation released OCPI version 2.3.0, representing one of the most substantial evolutions of the standard in years. Unlike previous updates that focused primarily on expanding roaming capabilities, OCPI 2.3.0 was explicitly designed to meet real-world regulatory and operational needs.
OCPI 2.3.0 introduced several new elements:
- EU AFIR (Alternative Fuels Infrastructure Regulation) compliance, ensuring the protocol natively supports the data fields that charge point operators must provide to National Access Points.
- Support for North American tax structures, enhancing the protocol's global applicability.
- Plug & Charge compatibility indicators were integrated to align with ISO 15118 developments.
- A Payment Terminal module was added to standardise how ad-hoc credit card payments at charging stations are handled in back-end systems.
The OCPI Booking Module
But the real game-changer came in June. At EVS38 in Gothenburg, the EVRoaming Foundation unveiled the OCPI Booking Module. Developed by a cross-industry workgroup that included Milence, Volvo Group, DAF Trucks, Daimler Truck, Shell, and Gireve, this module standardises how drivers, particularly fleet operators, can reserve charging stations in advance.
Before this, charger reservations typically relied on proprietary systems that locked operators and drivers into specific platforms. The OCPI Booking Module changed that equation. Now, a fleet management system could reserve charging slots across multiple networks using a single, open interface. For commercial fleets and heavy-duty vehicles that need guaranteed charging availability during routes, this represented a fundamental shift from vendor lock-in to genuine interoperability.
OCPI 3.0 is around the corner
Meanwhile, work progressed on OCPI 3.0. A draft version became available by mid-2025, focusing on architectural improvements and deeper integration with ISO 15118 for Plug & Charge and smart energy management. Critically, OCPI 3.0 modules are being designed for backward compatibility with 2.3.0, ensuring that the industry's investments in the current standard won't become obsolete as new capabilities emerge.
The regulatory catalyst
Technical improvements alone don't drive industry-wide adoption; market forces and regulatory requirements do. And 2025 delivered a powerful regulatory push that accelerated OCPI implementation across Europe.
On April 14, 2025, the EU's AFIR Article 20 came into force, mandating that all operators of publicly accessible chargers make key station information available to National Access Points through open, standardised APIs. This includes both static data, location, connector types, accessibility features, and dynamic data like real-time availability, status, and pricing.
AFIR didn't mandate a specific protocol. In practice, many EU Member States implemented their own NAP interfaces rather than adopting a single standard. However, OCPI 2.3.0 had explicitly been designed to cover all required AFIR data points, positioning it as the logical foundation for compliance—even if not the direct integration method.
The result was a pragmatic, two-layered approach. CPOs and their CPMS providers increasingly standardised on OCPI as their data exchange protocol, while specialised aggregation services, such as Eco-Movement, acted as translation hubs, converting OCPI feeds into the various country-specific NAP formats required across Europe.
A handful of countries took a more direct approach. Denmark, for instance, published guidance in 2024/2025 indicating it would accept OCPI data feeds to populate its national database, recognising that rejecting OCPI would hinder data collection, while accepting it ensured high-quality, real-time data flow.
But whether through direct acceptance or via intermediary hubs, the outcome was the same: CPOs who might have previously viewed roaming protocols as a 'nice to have' for business development suddenly needed OCPI-compliant data structures simply to operate legally. OCPI became the de facto standard. Not because regulators mandated it, but because the industry converged on it as the most efficient solution to a complex, multi-country compliance challenge.
'What AFIR ultimately achieved wasn't just regulatory compliance—it was the final push that made OCPI the common language of European EV charging infrastructure.'
By the end of 2025, dozens of European operators had either implemented OCPI connections directly or ensured their CPMS providers exposed OCPI-compliant data that could be routed through aggregation services to meet NAP requirements. What AFIR ultimately achieved wasn't just regulatory compliance—it was the final push that made OCPI the common language of European EV charging infrastructure.
This regulatory push didn't just boost OCPI adoption numbers; it changed the data landscape. The vast majority of new public chargers installed in Europe throughout 2025 now have their details flowing through standardised OCPI-based systems.
Navigation apps can display accurate, real-time information. EMSPs can offer true roaming across networks. And drivers benefit from unprecedented transparency about where they can charge and what it will cost.
The industry unites: Hubject joins OCPI
Against this backdrop of technical evolution and regulatory requirements, September's Hubject announcement landed with particular force.
Hubject had long operated the intercharge platform using its own OICP (Open InterCharge Protocol). Being a major roaming hub, it had little competitive pressure to adopt another standard.
But in joining the EVRoaming Foundation and committing to OCPI support, Hubject signalled something profound: the industry was converging on a single protocol. Not because regulation forced it, but because interoperability benefits everyone.
Christian Hahn, CEO of Hubject, framed it clearly: 'Open standards succeed when they're accessible at scale. By bringing OCPI to our proven interoperability platform, we're giving partners the freedom to connect using the protocols that best serve their business needs.'
The EVRoaming Foundation's response was equally significant. Michel Bayings, Director of EVRoaming Foundation, noted: 'Their support and acknowledgement of OCPI as a global communication standard is a major step for the industry and will benefit EV drivers everywhere. The market unites—the EV driver benefits.'
'Hubject's commitment to OCPI represents more than just another integration—it's validation that the industry has made its choice.'
Ronald Peters, Product Owner at GreenFlux
With Hubject on board, alongside other major roaming hubs like Gireve and e-clearing.net (which already supported OCPI), the protocol landscape had fundamentally shifted. CPOs and eMSPs could now invest in OCPI implementation with confidence that it would give them access to essentially every major roaming network globally. The days of maintaining multiple protocol integrations, or worse, choosing sides in a standards war, were effectively over.
Ronald Peters, Product Owner at GreenFlux and participant in EVRoaming Foundation meetings, has watched this convergence unfold firsthand: 'We've been tracking these developments through our work with the EVRoaming Foundation. Hubject's commitment to OCPI represents more than just another integration—it's validation that the industry has made its choice. With GreenFlux as one of the founding contributors to this open standard, our early commitment to OCPI is now paying dividends for our customers. We took the risk of backing an open protocol before it became the industry consensus, and that foundation is exactly why we can manage 260+ connections today, while others are still catching up.'
GreenFlux: 260+ OCPI connections and counting
At GreenFlux, we haven't just watched this OCPI momentum from the sidelines—we've been actively implementing it at scale.
Over the years, we have connected over 1 million charge points and 20 million tokens to our roaming network, many of them via OCPI. Today, we maintain 260+ OCPI connections—220 of which are managed connections where we handle the operational complexity on behalf of our clients. This represents one of the largest OCPI networks in the industry.
These aren't just numbers on a capability sheet—they represent years of commitment to open standards and the day-to-day technical work that makes interoperability actually function at scale. We were able to achieve this because we were OCPI believers before it became the industry consensus, and that early commitment means we've built the expertise and operational processes to manage connections at scale.
What does maintaining 260+ OCPI connections really mean? It means handling version updates across hundreds of partner integrations. It means troubleshooting when a partner upgrades their system, and something breaks. It means ensuring data quality and consistency so that driver sessions, charging detail records, and billing information flow correctly across network boundaries. It means managing the critical operational work that determines whether "we support OCPI" is marketing speak or operational reality.
The future of OCPI
If 2025 marked a major step towards interoperability through OCPI, the coming years will focus on unlocking what that foundation enables.
The technical roadmap for OCPI 3.0, already drafted in mid-2025, will support these emerging use cases through a more flexible architecture and deeper ISO 15118 integration.
Advanced roaming capabilities represent the next frontier. Mind you, the introduction of the Booking Module in 2025 was just the beginning. Fleet operators are increasingly seeking guaranteed charging availability, predictable pricing for route planning, and seamless reservation management across multiple networks.
Dynamic pricing mechanisms that respond to grid conditions and energy markets in real time are expected to create new opportunities for CPOs. These needs are already being voiced by commercial fleets managing electric trucks and buses. And OCPI is evolving to standardise how they work across roaming networks.
Another developing area involves OCPI’s role as the roaming layer for emerging vehicle and grid technologies. As ISO 15118 enables Plug & Charge authentication and bidirectional charging at the vehicle-to-charger level, OCPI will handle the business and roaming aspects. When a driver uses Plug & Charge at a roaming partner’s station, OCPI manages authorisation, session data, and billing between the eMSP and CPO.
How will OCPI impact your business?
Looking ahead, as vehicles provide grid services through vehicle-to-grid (V2G) technology, OCPI will need to support settlement and data exchange between the parties involved. The protocol must evolve in tandem with these technical advances to ensure seamless interoperability.
Jorge Moreira, Senior Product Owner - Managed Roaming at GreenFlux and active participant in EVRoaming Foundation working groups, sees the 2025 convergence as just the beginning: 'The exciting part is that OCPI 3.0 and ISO 15118 integration will unlock entirely new business models, from vehicle-to-grid services to real-time dynamic pricing. The CPOs who are building on strong OCPI foundations today will be best positioned to take advantage of these opportunities tomorrow.'
'The exciting part is that OCPI 3.0 and ISO 15118 integration will unlock entirely new business models, from vehicle-to-grid services to real-time dynamic pricing.'
Jorge Moreira, Senior Product Owner - Managed Roaming at GreenFlux
Perhaps the most significant shift will be geographic. While Europe led OCPI implementation in 2025, North America and Asia-Pacific are accelerating adoption. The protocol’s proven success in Europe provides a template that other regions can adapt. As global automakers and energy companies operate across continents, the case for a unified global standard strengthens.
For charge point operators, the implications are clear. The question isn’t 'Should we adopt OCPI?' anymore—at least in Europe. The question is: 'How do we build on this foundation?'
As mass-market EV adoption accelerates, seamless interoperability becomes table stakes rather than a differentiator. The CPOs who succeed will be those who choose partners with proven operational capabilities and the scale to handle evolving requirements. The infrastructure for the next decade of EV growth is being built right now—and it’s being built on OCPI.
GreenFlux is a full member of the EVRoaming Foundation, the organisation that develops and maintains the OCPI protocol. Team members Ronald Peters and Jorge Moreira participate in EVRF working group meetings, contributing to the ongoing development of the standard.
Want to learn more about how managed roaming services can extend your network's reach? Feel free to contact us.
