Blog
OCPP and EV charging blog
Technical guides, protocol deep-dives, and best practices for OCPP, OCPI, smart charging, and EV infrastructure testing.
Articles
7 min read
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.
Read guide →
7 min read
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.
Read guide →
8 min read
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.
Read guide →
9 min read
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.
Read guide →
21 min read
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.
Read guide →
18 min read
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.
Read guide →
22 min read
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.
Read guide →
27 min read
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.
Read guide →
16 min read
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.
Read guide →
17 min read
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.
Read guide →
20 min read
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.
Read guide →
14 min read
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.
Read guide →
24 min read
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.
Read guide →
23 min read
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.
Read guide →
13 min read
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.
Read guide →
5 min read
What Is a CSMS? Charging Station Management System & CPMS
What a CSMS is, how Charging Station Management System differs from CPMS slang and from OCPP 1.6 Central System, and how EV teams build, buy, and test one.
Read guide →
4 min read
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.
Read guide →
8 min read
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.
Read guide →
9 min read
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.
Read guide →
11 min read
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.
Read guide →
10 min read
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.
Read guide →
4 min read
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.
Read guide →
6 min read
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.
Read guide →
11 min read
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.
Read guide →
15 min read
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.
Read guide →
13 min read
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.
Read guide →
2 min read
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.
Read guide →
4 min read
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.
Read guide →