OCPI 3.0 Preview: V2G, Grid Services & Migration Timeline
OCPI 3.0 preview: what the next major version is set to change (V2G, grid services), the realistic release timeline, and how to prepare in 2026.
EV Charging Industry Blogs
Stay informed with the latest trends, insights, and developments in the electric vehicle charging industry.
OCPI 2.3.0: What Is New in the Latest Version
What is new in OCPI 2.3.0: the Payments module, AFIR-ready pricing, a Parking object, North American tax support, and who should upgrade.
OCPI 2.2 vs 2.2.1 Differences: Every Change and When to Upgrade
OCPI 2.2 vs 2.2.1 differences explained: the exact fields and enums 2.2.1 changed, what stayed the same, and whether you need to migrate.
OCPI HubClientInfo Module: How Hub Discovery Works
How the OCPI HubClientInfo module lets a hub publish its connected parties, with worked PUT/GET examples, the four status values, and the gotchas that bite.
What Is an EV Charging Roaming Hub? How It Works + Costs
What an EV charging roaming hub is, how it solves the N-by-N problem, what hubs charge, the major hubs in North America and Europe, and hub vs direct.
EV Charging Connectors: CCS, NACS, CHAdeMO & Type 2 Compared
CCS, NACS, CHAdeMO, Type 2, J1772: the 6 EV charging connectors, where each is used in North America and Europe, and which one your EV needs.
OCPI 2.1.1 to 2.2 Migration: The Step-by-Step Order
OCPI 2.1.1 to 2.2 migration in the order to actually do it: what changed, the Credentials handshake to fix first, and how to upgrade without breaking partners.
OCPI ChargingProfiles: Smart Charging via Roaming Explained
How OCPI ChargingProfiles lets an eMSP shape smart charging on a live session: the fields, a full worked example, common gotchas, and why adoption lags.
OCPI Hub vs Peer-to-Peer: How to Choose
When to roam through a hub, when to build direct peer-to-peer integrations, and what the tradeoffs cost you in practice.
OCPI Credentials and Versions Modules: How Partners Find Each Other
Before any data can flow between an eMSP and a CPO via OCPI, they have to negotiate. The Credentials and Versions modules are the handshake.
OCPI Commands Module: Remote Charging Control Across Networks
How eMSPs trigger start/stop/reserve actions on CPO stations via OCPI. The Commands module is what makes "Start Session" buttons in apps work.
OCPI Tariffs Module Explained: Fields, JSON, Examples
How the OCPI Tariffs module models EV charging prices — per-kWh, per-minute, time-of-use, idle fees — with annotated JSON, step_size gotchas, worked examples.
OCPI Locations Module Explained: Data Model & Push Updates
The OCPI Locations module, explained: the Location/EVSE/Connector data model, real-time push updates, evse_id format, and gotchas — with worked examples.
OCPI Tokens Module: Authentication Without Sharing Customer Data
How eMSPs grant their customers access to CPO stations via tokens — and how CPOs validate those tokens without ever seeing the underlying customer.
What Is OCPP? The Open Charge Point Protocol Explained
OCPP is the protocol that lets charging stations talk to back-end systems. Here is what it is, why it exists, how it works, and how the major versions differ.
OCPI CDRs Module: How Billing Records Flow Between Networks
CDRs (Charge Detail Records) are the final, immutable billing records exchanged via OCPI after a session completes. Here is how they work.
OCPI Sessions Module: Live Charging Session Tracking, Explained
How CPOs stream live session data to eMSPs via OCPI — when sessions start, how kW is flowing, and how status changes get pushed in real time.
Level 1 vs Level 2 vs DC Fast Charging: The Complete Guide
The three power tiers in EV charging — what each is for, real-world charging times, when each makes sense, and how connectors map to each.
What Is a CPO? What Is an eMSP? EV Charging Roles Explained
CPOs operate the charging stations. eMSPs own the customer relationship. The split is the foundation of how the EV charging industry actually works.
kW vs kWh: What Every EV Owner Should Know
kW is power (rate); kWh is energy (quantity). The distinction matters for chargers, batteries, and specs. The practical version.
OCPI Version History: 2.1.1 → 2.2 → 2.2.1 → 2.3.0 → What's Next
Every OCPI version — 2.1.1, 2.2, 2.2.1, 2.3.0 and the 3.0 preview: what changed, why 2.2.1 is the baseline, and which version to implement in 2026.
OCPI vs OCPP vs OICP vs ISO 15118: A Plain-English Comparison
OCPI vs OCPP: one connects charging networks, the other a station to its operator. Plus OICP and ISO 15118 — what each does and which layer it lives at.
What Is EV Charging? A Plain-English Introduction
EV charging means refilling an electric vehicle's battery from an external source. The practical version every owner and professional should know.
OCPI Explained: The Protocol That Makes EV Roaming Possible
OCPI (Open Charge Point Interface) lets EV drivers charge across networks with one account. What it is, why it exists, how it works.
Welcome to Learn EV Charging
What this site is, what we publish, and how to get the most out of it — a quick orientation for new readers.