OCPP & EV Charging Blog
Technical guides, protocol deep-dives, and best practices for OCPP, OCPI, smart charging, and EV infrastructure testing.
Best OCPP Simulators in 2025: Cloud vs Open-Source Compared
Compare the best OCPP simulators for CSMS testing, including cloud platforms, open-source tools, and field utilities for OCPP 1.6 and OCPP 2.0.1 workflows.
OCPI 2.1.1 vs 2.2.1: Differences, Features, and Upgrade Guide
Compare OCPI 2.1.1 and OCPI 2.2.1 across roaming modules, hub support, ChargingProfiles, HubClientInfo, tariffs, and upgrade decisions for EV charging teams.
How to Test a CSMS: The Complete Guide to Charge Station Management System Testing
A comprehensive guide to CSMS testing covering OCPP protocol validation, load testing, integration testing, security testing, and automated QA. Learn the testing methodology used by teams managing 10,000+ charge points.
OCPP Implementation Guide: How to Build a CSMS for 1.6 and 2.0.1
Step-by-step OCPP implementation guide for building a CSMS with OCPP 1.6 and OCPP 2.0.1, including WebSocket setup, message handling, transactions, smart charging, and testing.
OCPP Message Types Reference: 1.6 and 2.0.1 Explained
Reference guide to OCPP 1.6 and OCPP 2.0.1 message types, including BootNotification, StartTransaction, MeterValues, TransactionEvent, directions, payloads, and use cases.
OCPI Endpoints Reference: API Guide for 2.1.1 and 2.2.1
Reference guide to OCPI 2.1.1 and 2.2.1 endpoints across Locations, Sessions, CDRs, Tariffs, Tokens, Commands, and other modules with methods, payloads, and implementation notes.
How to Implement OCPI Roaming: Step-by-Step Guide for CPOs and eMSPs
A practical guide to implementing OCPI 2.1.1 roaming for your EV charging network. Covers credential exchange, module implementation, hub integration with GIREVE and Hubject, and testing strategies for CPOs and eMSPs.
Best OCPP Testing Tools in 2025: Simulators, Emulators, and Validators
Compare the best OCPP testing tools in 2025, including OCPPLab, SteVe, OCPP.js, EVerest, and MobileCharger Simulator, with feature, scale, and use-case tradeoffs.
OCPP Security Profiles Explained: TLS, Certificates & Authentication in OCPP 2.0.1
A deep dive into OCPP 2.0.1 security profiles 1, 2, and 3. Covers TLS configuration, certificate management, HTTP Basic Auth, mutual TLS authentication, signed firmware updates, and practical implementation guidance.
OCPI vs OICP vs OCHP: EV Charging Roaming Protocols Compared
A detailed comparison of the three major EV charging roaming protocols: OCPI, OICP, and OCHP. Covers architecture, adoption, features, and which protocol to implement for your charging network.
What Is OCPP? Open Charge Point Protocol Explained
What OCPP is, how the Open Charge Point Protocol works, and what EV charging teams need to know about OCPP 1.6, OCPP 2.0.1, message flows, security, and testing.
What Is OCPI? EV Charging Roaming Protocol Explained
What OCPI is, how EV charging roaming works, and what CPOs and eMSPs need to know about OCPI 2.1.1, OCPI 2.2.1, modules, hubs, and implementation.
OCPP 1.6 vs 2.0.1: Differences, Features, and Migration Guide
Compare OCPP 1.6 and OCPP 2.0.1 across security, smart charging, device management, transaction handling, ISO 15118 support, and migration planning for CSMS teams.
What Is a CSMS? Charging Station Management System Explained
What a CSMS is, what a Charging Station Management System does, how it works with OCPP, and how EV charging teams build, evaluate, and test one.
CPO vs eMSP: Understanding EV Charging Roles Explained
CPO (Charge Point Operator) and eMSP (e-Mobility Service Provider) are the two key roles in EV charging. Learn the differences, how they work together via OCPI, and examples of each.
Smart Charging Explained: How EV Load Management Works
Smart charging is the intelligent management of EV charging power based on grid conditions, energy prices, and driver needs. Learn how smart charging works with OCPP, load balancing strategies, peak shaving, V2G, and ISO 15118.
The Complete Guide to EV Charger Testing: Methods, Tools & Best Practices
EV charger testing ensures your CSMS and charging infrastructure work reliably at scale. Learn the key testing methods — functional, load, compliance, integration, and regression — plus best practices for virtual vs physical testing.
OCPP WebSocket Communication: A Developer's Guide
OCPP uses WebSocket for real-time communication between EV chargers and management systems. Learn about the connection lifecycle, OCPP JSON message format (CALL, CALLRESULT, CALLERROR), heartbeat, reconnection, security, and debugging.
GIREVE Hub Integration Guide: Connect Your Charging Network to Europe
GIREVE is Europe's largest EV charging roaming hub, connecting 400+ CPOs and eMSPs. Learn how to integrate with GIREVE via OCPI, the certification process, and how it compares to Hubject and e-clearing.net.
ISO 15118 & Plug and Charge: The Future of EV Charging Authentication
ISO 15118 enables Plug and Charge — automatic EV authentication without apps or RFID cards. Learn how it works, its relationship with OCPP 2.0.1, and how to test it.
EV Charging Glossary: 50+ Terms Every Developer Should Know
A comprehensive glossary of EV charging terminology covering OCPP, OCPI, CSMS, CPO, eMSP, smart charging, ISO 15118, and more. The definitive reference for EV charging developers.
Best CSMS Platforms in 2025: Open Source vs Commercial Compared
A comprehensive comparison of the best CSMS platforms in 2025, including open source options like SteVe, Open e-Mobility, and CitrineOS, and commercial platforms like ChargePoint, EVBox, Current, and Ampcontrol. Covers pricing, OCPP support, scalability, and how to choose the right one.
OCPP Error Codes: Complete Reference Guide for Developers
A complete reference guide to all OCPP error codes including NotImplemented, NotSupported, InternalError, ProtocolError, SecurityError, and more. Learn the CALLERROR message format, common causes for each error, troubleshooting steps, and debugging techniques.
How to Build a CSMS: Architecture Guide for EV Charging Platforms
A comprehensive architecture guide for building a CSMS (Charging Station Management System) from scratch. Covers WebSocket server design, OCPP message routing, authorization, transaction management, smart charging, OCPI integration, technology choices, and scaling strategies.
Introducing OCPPLab
Introducing OCPPLab, a comprehensive testing platform for EV charging infrastructure.
How to Test OCPP Protocols Effectively
A comprehensive guide to effective OCPP protocol testing and validation strategies.
Why Choose OCPP Emulation Over Physical Testing?
Exploring the compelling benefits of virtual OCPP testing versus traditional hardware-based approaches.