Question 1

What is Plug & Charge?

Accepted Answer

Plug & Charge (standardised in ISO 15118) enables EV drivers to automatically authenticate and pay for charging sessions simply by plugging their vehicle into a charging station — with no apps, RFID cards, or payment terminals required. The vehicle communicates directly with the charger to handle identity verification and billing.

Question 2

What does VOLTIER do?

Accepted Answer

VOLTIER is the developer platform for EV charging payments, based in London, UK. We provide charging networks and mobility providers with a single API to deploy Plug & Charge infrastructure — covering ISO 15118 certificate management, contract and vehicle provisioning, billing, and integrations with ecosystem providers such as Hubject, Gireve, and Irdeto.

Question 3

How does VOLTIER simplify Plug & Charge deployment?

Accepted Answer

VOLTIER abstracts the complexity of ISO 15118 through a single developer API. Instead of building separate integrations for PKI infrastructure, certificate lifecycle management, roaming hubs, and billing, charging networks connect once to VOLTIER and get the full Plug & Charge stack. Deployment time reduces from months to hours.

Question 4

What is ISO 15118?

Accepted Answer

ISO 15118 is the international communication standard that defines how electric vehicles and charging stations exchange data. It enables Plug & Charge automatic authentication, smart charging profiles, and Vehicle-to-Grid (V2G) energy flows — eliminating the need for RFID cards or mobile apps at the charger.

Question 5

What is the difference between a CPO and an eMSP in EV charging?

Accepted Answer

A Charge Point Operator (CPO) owns and operates physical EV charging infrastructure. An e-Mobility Service Provider (eMSP) gives EV drivers access to charging networks, handling authentication and billing on the driver side. VOLTIER serves both by providing the Plug & Charge infrastructure layer that connects CPO hardware with eMSP contracts through ISO 15118.

Question 6

Which EV charging ecosystem providers does VOLTIER integrate with?

Accepted Answer

VOLTIER integrates with leading Plug & Charge ecosystem providers including Hubject (the largest Plug & Charge clearing house), Gireve (European EV roaming platform), and Irdeto (digital security for connected vehicles). These integrations are pre-built, so charging networks do not need to manage them separately.

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