Deep-dive guides to OCPI, OCPP, ISO 15118, and EV charging fundamentals — written for engineers, PMs, and operators in the EV charging industry.https://learnevcharging.com/en-ushttps://learnevcharging.com/blog/ocpi/ocpi-3-0-preview/https://learnevcharging.com/blog/ocpi/ocpi-3-0-preview/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.Thu, 16 Jul 2026 00:00:00 GMTOCPIocpiroadmap3.0protocolshttps://learnevcharging.com/blog/ocpi/ocpi-2-3-whats-new/https://learnevcharging.com/blog/ocpi/ocpi-2-3-whats-new/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.Wed, 15 Jul 2026 00:00:00 GMTOCPIocpiprotocolsversions2.3https://learnevcharging.com/blog/ocpi/ocpi-2-2-vs-2-2-1/https://learnevcharging.com/blog/ocpi/ocpi-2-2-vs-2-2-1/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.Tue, 14 Jul 2026 00:00:00 GMTOCPIocpiversionsprotocolshttps://learnevcharging.com/blog/ocpi/ocpi-hubclientinfo-module/https://learnevcharging.com/blog/ocpi/ocpi-hubclientinfo-module/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.Mon, 13 Jul 2026 00:00:00 GMTOCPIocpimodulesroaminghubshttps://learnevcharging.com/blog/business/what-is-a-roaming-hub/https://learnevcharging.com/blog/business/what-is-a-roaming-hub/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.Sun, 12 Jul 2026 00:00:00 GMTBusiness & Strategyroaminghubsbusinessstrategyhttps://learnevcharging.com/blog/fundamentals/ev-charging-connectors-explained/https://learnevcharging.com/blog/fundamentals/ev-charging-connectors-explained/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.Sun, 12 Jul 2026 00:00:00 GMTCharging Infrastructureconnectorsstandardsfundamentalshttps://learnevcharging.com/blog/ocpi/ocpi-2-1-1-to-2-2-migration/https://learnevcharging.com/blog/ocpi/ocpi-2-1-1-to-2-2-migration/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.Sun, 12 Jul 2026 00:00:00 GMTOCPIocpimigrationprotocolsintegrationhttps://learnevcharging.com/blog/ocpi/ocpi-chargingprofiles-module/https://learnevcharging.com/blog/ocpi/ocpi-chargingprofiles-module/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.Sun, 12 Jul 2026 00:00:00 GMTOCPIocpismart chargingmodulesv2ghttps://learnevcharging.com/blog/ocpi/hub-vs-peer-to-peer-ocpi/https://learnevcharging.com/blog/ocpi/hub-vs-peer-to-peer-ocpi/When to roam through a hub, when to build direct peer-to-peer integrations, and what the tradeoffs cost you in practice.Sat, 11 Jul 2026 00:00:00 GMTOCPIocpiroamingarchitecturestrategyhttps://learnevcharging.com/blog/ocpi/ocpi-credentials-and-versions/https://learnevcharging.com/blog/ocpi/ocpi-credentials-and-versions/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.Fri, 10 Jul 2026 00:00:00 GMTOCPIocpicredentials-moduleversions-modulemodulesintegrationhttps://learnevcharging.com/blog/ocpi/ocpi-commands-module/https://learnevcharging.com/blog/ocpi/ocpi-commands-module/How eMSPs trigger start/stop/reserve actions on CPO stations via OCPI. The Commands module is what makes "Start Session" buttons in apps work.Thu, 09 Jul 2026 00:00:00 GMTOCPIocpicommands-modulemodulesdeep-divehttps://learnevcharging.com/blog/ocpi/ocpi-tariffs-module/https://learnevcharging.com/blog/ocpi/ocpi-tariffs-module/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.Wed, 08 Jul 2026 00:00:00 GMTOCPIocpitariffs-modulemodulesdeep-divepricinghttps://learnevcharging.com/blog/ocpi/ocpi-locations-module/https://learnevcharging.com/blog/ocpi/ocpi-locations-module/The OCPI Locations module, explained: the Location/EVSE/Connector data model, real-time push updates, evse_id format, and gotchas — with worked examples.Tue, 07 Jul 2026 00:00:00 GMTOCPIocpilocations-modulemodulesdeep-divehttps://learnevcharging.com/blog/ocpi/ocpi-tokens-module/https://learnevcharging.com/blog/ocpi/ocpi-tokens-module/How eMSPs grant their customers access to CPO stations via tokens — and how CPOs validate those tokens without ever seeing the underlying customer.Tue, 07 Jul 2026 00:00:00 GMTOCPIocpitokens-modulemodulesdeep-diveauthenticationhttps://learnevcharging.com/blog/ocpp/what-is-ocpp/https://learnevcharging.com/blog/ocpp/what-is-ocpp/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.Tue, 07 Jul 2026 00:00:00 GMTOCPPocppprotocolsfundamentalshttps://learnevcharging.com/blog/ocpi/ocpi-cdrs-module/https://learnevcharging.com/blog/ocpi/ocpi-cdrs-module/CDRs (Charge Detail Records) are the final, immutable billing records exchanged via OCPI after a session completes. Here is how they work.Mon, 06 Jul 2026 00:00:00 GMTOCPIocpicdrs-modulemodulesdeep-divebillinghttps://learnevcharging.com/blog/ocpi/ocpi-sessions-module/https://learnevcharging.com/blog/ocpi/ocpi-sessions-module/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.Sun, 05 Jul 2026 00:00:00 GMTOCPIocpisessions-modulemodulesdeep-divehttps://learnevcharging.com/blog/fundamentals/level-1-vs-level-2-vs-dc-fast-charging/https://learnevcharging.com/blog/fundamentals/level-1-vs-level-2-vs-dc-fast-charging/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.Sat, 04 Jul 2026 00:00:00 GMTCharging Infrastructurefundamentalslevelscomparisonhttps://learnevcharging.com/blog/business/what-is-a-cpo-and-emsp/https://learnevcharging.com/blog/business/what-is-a-cpo-and-emsp/CPOs operate the charging stations. eMSPs own the customer relationship. The split is the foundation of how the EV charging industry actually works.Thu, 02 Jul 2026 00:00:00 GMTOCPIcpoemsprolesbusiness-modelsocpihttps://learnevcharging.com/blog/fundamentals/kw-vs-kwh-explained/https://learnevcharging.com/blog/fundamentals/kw-vs-kwh-explained/kW is power (rate); kWh is energy (quantity). The distinction matters for chargers, batteries, and specs. The practical version.Thu, 02 Jul 2026 00:00:00 GMTEV Charging Basicsfundamentalsbasicshttps://learnevcharging.com/blog/ocpi/ocpi-version-history/https://learnevcharging.com/blog/ocpi/ocpi-version-history/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.Wed, 01 Jul 2026 00:00:00 GMTOCPIocpiversionshistorymigrationhttps://learnevcharging.com/blog/business/ocpi-vs-ocpp-vs-iso15118/https://learnevcharging.com/blog/business/ocpi-vs-ocpp-vs-iso15118/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.Tue, 30 Jun 2026 00:00:00 GMTProtocols & Standardsocpiocppiso15118oicpprotocolscomparisonhttps://learnevcharging.com/blog/fundamentals/what-is-ev-charging/https://learnevcharging.com/blog/fundamentals/what-is-ev-charging/EV charging means refilling an electric vehicle's battery from an external source. The practical version every owner and professional should know.Mon, 29 Jun 2026 00:00:00 GMTEV Charging Basicsfundamentalsgetting-startedev-basicscharging-levelshttps://learnevcharging.com/blog/ocpi/what-is-ocpi/https://learnevcharging.com/blog/ocpi/what-is-ocpi/OCPI (Open Charge Point Interface) lets EV drivers charge across networks with one account. What it is, why it exists, how it works.Sun, 28 Jun 2026 00:00:00 GMTOCPIocpiprotocolsroamingfundamentalshttps://learnevcharging.com/blog/welcome-to-learn-ev-charging/https://learnevcharging.com/blog/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.Thu, 25 Jun 2026 00:00:00 GMTEV Charging Basicsannouncementgetting-started