OCPP & EV Charging Blog
Technical guides, protocol deep-dives, and best practices for OCPP, OCPI, smart charging, and EV infrastructure testing.
Articles
OCPP AI Agents for EV Charging: A Complete Guide
How OCPP AI agents automate EV charging across 5 use cases — fault diagnosis to smart charging — plus architecture, guardrails, and how to test them safely.
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LLM vs SLM for EV Charging: How to Choose the Right Model
LLM vs SLM for EV charging software: when to use each across OCPP fault triage, edge monitoring, and AI agents, plus a hybrid pattern for 5,000+ chargers.
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Best OCPP Simulators & Emulators in 2026 Compared
Compare the 4 best OCPP simulators and emulators for CPMS testing: cloud platforms, open-source libraries, and field tools for OCPP 1.6 and 2.0.1 workflows.
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OCPI 2.1.1 vs 2.2.1: Differences, Features & 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.
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How to Test a CPMS: The Complete Testing Guide
A complete guide to CPMS testing: 7 core methods—protocol conformance, load, security, integration, and roaming—plus a full checklist and CI/CD pipeline.
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OCPP Implementation Guide: Build a CPMS for 1.6 & 2.0.1
Step-by-step OCPP implementation guide to build a CPMS for OCPP 1.6 and 2.0.1, covering WebSocket setup, the 7 core messages, smart charging, and testing.
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OCPP Message Types Reference: 1.6 and 2.0.1 Explained
Reference guide to all OCPP 1.6 and 2.0.1 message types, including the 28 core 1.6 actions, TransactionEvent, directions, payloads, and worked examples.
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OCPI Endpoints Reference: API Guide for 2.1.1 and 2.2.1
Complete OCPI endpoint reference for versions 2.1.1 and 2.2.1, covering all 9 modules with methods, payloads, party ownership, and implementation notes.
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How to Implement OCPI Roaming: A Complete Guide
Implement OCPI 2.1.1 roaming for your EV charging network. A step-by-step guide to all 7 modules, credentials, hub integration, and testing for CPOs and eMSPs.
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Best OCPP Testing Tools in 2026: Compared & Explained
Compare 5 of the best OCPP testing tools in 2026 — OCPPLab, SteVe, OCPP.js, EVerest, and MobileCharger — across scale, automation, and pricing tradeoffs.
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OCPP Security Profiles Explained: TLS & Certificates
OCPP 2.0.1 defines three mandatory security profiles. Learn how Profiles 1, 2, and 3 handle TLS, certificate management, and mutual TLS authentication.
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OCPI vs OICP vs OCHP: EV Charging Roaming Protocols Compared
Compare OCPI vs OICP vs OCHP, the 3 main EV charging roaming protocols, by architecture, adoption, and Plug&Charge support so you can pick the right standard.
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What Is OCPP? Open Charge Point Protocol Explained
What OCPP is, how the Open Charge Point Protocol works, and what EV charging teams must know about OCPP 1.6, 2.0.1, message flows, security, and testing.
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What Is OCPI? EV Charging Roaming Protocol Explained
What OCPI is, how EV charging roaming works, and what CPOs and eMSPs must know about OCPI 2.1.1 vs 2.2.1, all 8 modules, hubs, and how to implement it.
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OCPP 1.6 vs 2.0.1: Differences, Features & Migration Guide
Compare OCPP 1.6 and 2.0.1 across security, smart charging, the device model, transactions, and ISO 15118 — plus a 5-step migration guide for CPMS teams.
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What Is a CPMS? Charging Station Management System Explained
What a CPMS is, what a Charging Station Management System does, how it works with OCPP, its 8 core functions, and how EV teams build, buy, and test one.
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CPO vs eMSP: Understanding EV Charging Roles Explained
CPO vs eMSP: the two core EV charging roles. Learn how they differ, their business models, and the 7-step OCPI flow that connects chargers to EV drivers.
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Smart Charging Explained: How EV Load Management Works
Learn how smart charging controls EV power with OCPP charging profiles across 6 strategies—load balancing, peak shaving, demand response, ISO 15118, and V2G.
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Complete Guide to EV Charger Testing: Tools & Methods
Learn five EV charger testing methods—functional, load, compliance, integration, and regression—plus virtual vs physical best practices to ship a reliable CPMS.
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OCPP WebSocket Communication: A Developer's Guide
Learn how OCPP uses WebSocket for real-time EV charger communication: connection lifecycle, 3 JSON message types, heartbeat, reconnection, and WSS security.
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GIREVE Hub Integration: A Complete Guide for CPOs & eMSPs
Learn how to integrate with GIREVE, Europe's leading EV charging roaming hub: OCPI modules, the 5-step certification process, costs, and Hubject comparison.
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ISO 15118 & Plug and Charge: EV Authentication Guide
ISO 15118 enables Plug and Charge: automatic EV authentication with no app or card. Learn how it works with OCPP 2.0.1, its 7-step flow, and how to test it.
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EV Charging Glossary: 50+ Terms Every Developer Should Know
A developer reference defining 50+ EV charging terms across OCPP, OCPI, CPMS, CPO, eMSP, ISO 15118, and smart charging, so you can ship integrations faster.
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Best CPMS Platforms 2025: Open Source vs Commercial
Compare 7 open source and commercial CPMS platforms in 2025 across OCPP, scalability, OCPI roaming, and pricing to choose the right one for your network.
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OCPP Error Codes: Complete Reference Guide for Developers
Learn all 10 OCPP error codes, the CALLERROR message format, common causes, and step-by-step troubleshooting to debug EV charging infrastructure faster.
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How to Build a CPMS: Complete Architecture Guide
Build a production CPMS from scratch: WebSocket servers, OCPP message routing, authorization, smart charging, OCPI roaming, and scaling 6 core components.
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OCPP Emulator: A Complete Guide to Virtual Testing
OCPPLab is an OCPP emulator for testing EV charging software without hardware, covering OCPP 1.6, 2.0.1, and OCPI so teams can validate before deployment.
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How to Test OCPP Protocols Effectively: Complete Guide
Learn to test OCPP protocols effectively with compliance, functional, and load testing across 4 phases, using virtual emulation to skip costly charger hardware.
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Why Choose OCPP Emulation Over Physical Testing?
Virtual OCPP testing versus physical hardware: compare cost, speed, scale, and coverage, and learn why many teams run up to 90% of test cases in emulation.
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