EV Roaming – Why it’s Good for Everyone

Posted By Driivz Team
26 November

The concept of EV roaming, or eRoaming, is simple; it delivers the true “charge anywhere” experience. EV owners can charge on the road, across regions and borders on any eMobility service provider’s EV charging network.

Although appearing seamless to consumers, delivering electric vehicle roaming services is profoundly complex, requiring negotiated service and clearing agreements among eMobility providers and charge point operators, comprehensive communications requirements, various protocols, and support of multiple languages, currencies, tax rates, and regulations.

eRoaming for EV Drivers

Ideally, with eRoaming, consumers needing on-the-road charging can go to any eMobility service provider’s charging station and charge without hassle. Using an EV charging self-service mobile app, EV drivers can plan their routes based on the availability of EV charging stations, set their reservations, and charge with a unified customer account.

The only visible change in the customer experience is that instead of going to their “home” eMobility provider, they charge at an “away” charging site in a location their “home” provider doesn’t cover. The charging transaction is then integrated into their monthly invoice by their EMSP.

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What’s in it for Electric Vehicle Service Providers?

eRoaming enables EV charging industry players to directly benefit from the EV market’s exponential growth. CPOs can maximize the number of EV drivers charging at their charge points, when using 3rd party EMSP apps and cards.

EMSPs will optimize their own customers’ charging experiences by enabling seamless and hassle-free charging on multiple charging networks, using their branded mobile app or RFID card.

Making EV Roaming Work

Comprehensive EV roaming capabilities open customer access to an almost unlimited number of charging networks. Making it happen smoothly is exceptionally complex. Customer-facing technology must address the eRoaming experience, with seamless delivery of charging points availability and locations, as well as tariffs and pricing.

There are two technical options when it comes to enabling eRoaming. EV charging providers can leverage general a roaming hub, such as Hubject, GIREVE, or, or use a peer-to-peer Open Charge Point Interface (OCPI) protocol (OCPI 2.2 supports both network-to-network/peer-to-peer communications).

Ideally, an EV charging management solution integrates with all the roaming platforms and supports OCPI-based roaming, enabling a scalable, live and automated EV roaming setup between CPOs and EMSPs.

On the back end, eRoaming involves authorizing charging sessions, sharing charge point data, reconciliation of transactions between CPOs and EMSPs, smart charging, and more.

Taking It on the Road

Participating in the eRoaming ecosystem creates a win-win for service providers and their customers. Each player can leverage its competitive advantages to appeal to an even broader client base, while EV charging customers get the peace of mind with the complete elimination of range anxiety, knowing they can charge anywhere they travel.


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