A CPO, or charge point operator, is the company that operates and maintains electric vehicle charging stations and makes them available for use, whether on public streets, at fast-charging hubs, at workplaces or in retail car parks. In charging infrastructure for electric vehicles, the CPO is responsible for uptime, technical operation, energy supply and pricing at its charge points.
The CPO is not always the owner of the hardware or the company the driver pays. Its counterpart is the eMSP (e-mobility service provider), which issues charging cards and apps to drivers. Interoperability between CPOs and eMSPs, through roaming protocols, is what lets one app or card start sessions across many different networks.
What a CPO does in the charging value chain
The CPO sits between the electricity system and the driver-facing services. It secures a grid connection and energy supply, installs or commissions chargers, monitors them remotely through a charge point management system (CPMS), dispatches repairs and publishes station data such as location, connector types, availability and tariffs.
| Role | Main responsibility | Relationship to the driver |
|---|---|---|
| Site host | Provides the land or parking space | Indirect, often offers amenities |
| Charge point owner | Finances and owns the hardware | Usually none |
| CPO | Operates, maintains and prices the charger | Direct for ad hoc payment |
| eMSP | Issues apps and cards, bills sessions | Direct contract with the driver |
| Distribution system operator | Provides and manages the grid connection | None |
| Energy supplier | Sells electricity to the CPO | None |
Some companies hold several roles at once. A vertically integrated charging network often acts as owner, CPO and eMSP, selling directly through its own app while also accepting roaming partners. Other CPOs operate chargers on behalf of municipalities or retailers that own the equipment.
Protocols and systems a CPO relies on
A CPO’s operation rests on open communication standards. The Open Charge Point Protocol (OCPP) links each charger to the CPMS, carrying session starts and stops, meter values, status messages, remote commands and firmware updates. OCPP 1.6 remains widespread, while OCPP 2.0.1 adds stronger security, device management and smart charging profiles.
| Standard | Connects | Main purpose |
|---|---|---|
| OCPP | Charger to CPO back end | Control, monitoring, firmware updates |
| OCPI | CPO to eMSP or roaming hub | Station data, tariffs, sessions, billing records |
| ISO 15118 | Vehicle to charger | Plug and Charge, smart charging communication |
| OpenADR or similar | Grid or aggregator to CPO | Demand response signals |
| Eichrecht or local metrology rules | Meter to billing | Legally verifiable energy billing |
Roaming can be bilateral, with direct OCPI connections between a CPO and each eMSP, or run through roaming hubs that connect many parties at once. Plug and Charge under ISO 15118 lets the vehicle authenticate itself with a certificate, so the session starts without a card or app.
How a CPO earns revenue and manages costs
A CPO’s main income comes from the margin on energy sold per charging session, often supplemented by session fees, idle fees for blocking a charger, subscriptions and site partnerships. Pricing may be per kWh, per minute or both, depending on local metering law and market practice.
The largest cost drivers are hardware and grid connection capital, electricity purchase, demand charges for peak power in some tariff systems, maintenance and payment processing. Utilization is the decisive variable: a fast charger used for only a few percent of the day rarely recovers its investment, while a busy highway hub can be strongly profitable.
| Site type | Typical power | Business focus |
|---|---|---|
| On-street AC charging | 3.7-22 kW | Residents without home charging |
| Destination charging | 11-50 kW | Retail, hotels, leisure; dwell time of hours |
| Urban fast-charging hub | 50-300 kW | Ride-hailing, taxis, quick top-ups |
| Highway fast-charging corridor | 150-400 kW | Long-distance travel |
| Depot and fleet charging | 22 kW to megawatt level | Buses, vans, trucks on contract |
Reliability, grid integration and regulation
Drivers judge a CPO first by reliability. Uptime targets of 97 to 99 percent per charger are common in contracts and public funding rules, but true reliability also covers failed session starts, payment errors and damaged cables. Remote diagnostics, spare parts strategy and response time decide whether a station is truly usable.
CPOs increasingly take on a grid role. Through smart charging, they shape load to avoid peaks and respond to grid signals, and at some sites they add stationary batteries to reduce connection costs. Future V2G services would let CPOs or aggregators trade flexibility from parked vehicles.
Regulation shapes CPO obligations. In the European Union, the Alternative Fuels Infrastructure Regulation (AFIR) requires ad hoc payment by card at new fast chargers, transparent pricing and open data on availability, alongside minimum coverage targets along core road corridors.
Common challenges for charge point operators
- Low early utilization can make a network unprofitable for years while electric vehicle adoption grows.
- Grid connection delays often take longer than hardware installation, especially for high-power hubs.
- Interoperability problems between charger firmware, vehicles and back ends cause failed sessions that drivers blame on the CPO.
- Opaque roaming prices can make the same session cost very different amounts depending on the app used.
- Vandalism and cable theft raise maintenance costs at unattended sites.
The simple explanation
A CPO is the company that runs a charging station, much like a fuel company runs a petrol station. It makes sure the charger works, gets electricity to it, sets the price and sends a technician when something breaks.
The app on a driver’s phone may come from a different company that has an agreement with the CPO. The CPO keeps the charger working; the app company handles the customer account, and roaming agreements let one app work at many networks.
How it is used in practice
A regional CPO operates 12 fast-charging hubs along a motorway, each with six 300 kW chargers. Its CPMS receives OCPP status messages every few minutes. One morning, a charger reports repeated ground fault errors, and the operations team restarts it remotely; when the error returns, a technician is dispatched and replaces a faulty cable within six hours.
The CPO publishes availability and prices through OCPI to several roaming partners, so drivers can start sessions with many apps or simply pay by contactless card. During evening grid peaks, it caps total site power using a smart charging profile agreed with the local grid operator. Annual uptime across the network stays above 98 percent, which keeps both drivers and its funding body satisfied.