1. Market Background
The EU 《Authorisation Regulation (EU) 2025/656》 stipulates that, effective January 1, 2027, newly installed or renovated public AC/DC charging points must comply with at least EN ISO 15118-20:2022; when providing Plug & Charge services, they must also be compatible with both ISO 15118-2 and ISO 15118-20.
For new projects in Europe, the traditional SECC, which only supports DIN SPEC 70121 and ISO 15118-2, is being transitioned from the mainstream solution to a transitional solution.
💡 Note: The term "second-generation SECC" used in this article specifically refers to the generational progression of SECC technology within the industry, not a product version number of mSECC.
First-generation SECC: Centered around a single MCU and vehicle protocol conversion.
Second-generation SECC: Complies with ISO 15118-20, providing unified support for vehicle communication, cloud protocols, security, and remote operation and maintenance.
2. Product Positioning
mSECC is a dual-channel intelligent charging communication platform built on an industrial SoC and Linux.
It is compatible with existing national standard charging stations converted to European standards, providing a unified operating platform for multi-standard protocols and future software capabilities. It upgrades SECC from a simple protocol conversion module to a centralized control hub integrating vehicle, charging station, and cloud communications.
3. mSECC Product Specifications
3.1 Platform and Integration
|
Ability Category |
mSECC Specifications |
Customer Value |
|---|---|---|
|
Processing Platform |
Industrial SoC + Linux |
Supports concurrent multi-protocol operations, secure services, and continuous software upgrades. |
|
Channel Count |
Two independent communication channels for separate vehicles |
One mSECC replaces two original single-segment SECCs. |
|
Communication Module |
PLC / 10BASE-T1S Modular Configuration |
Each channel is configured with a physical layer and data link layer based on the shape of the gun barrel. |
|
Existing EV Charger Integration |
Dual-channel GB/T 27930 CAN interface, compatible with existing messages and charging timing sequences. |
The main program for pile control, screen, and power module services is retained; supports in-situ replacement after interface adaptation. |
|
New Platform Integration |
mLAN TCP + Standard C Driver API |
Under standard conditions, basic charging and OCPP link connection can be completed in as fast as one week. |
|
Client MCU Resources |
Driver static resource size < 16 KB (excluding lwIP network pool). |
Minimizes resource impact on the existing pile-control MCU. |
3.2 Vehicle Communication
|
Standard / Format |
Ability Category |
Status |
|---|---|---|
|
DIN SPEC 70121 |
DC EIM |
✅ Support |
|
ISO 15118-2 |
AC/DC EIM, Plug & Charge |
✅ Support |
|
ISO 15118-20 |
AC/DC EIM, Plug & Charge |
✅ Support |
|
ISO 15118-20 BPT |
Bidirectional energy transfer communication |
✅ Support |
|
CCS1 / CCS2 |
PLC + CP / PP / PE |
✅ Support |
|
ISO 15118-20 MCS |
10BASE-T1S + CE / ID / PE |
✅ Support |
|
SAE J3400 / NACS |
NACS interface compatible with high-level protocols |
✅ Support |
3.3 Cloud Protocol
|
Standard |
Ability Category |
Status |
|---|---|---|
|
OCPP 1.6J |
Basic charging, transactions, remote control, smart charging |
✅ Support |
|
OCPP 2.0.1 C+S |
Core + Advanced Security |
✅ Support |
|
OCPP 2.0.1 PnC |
ISO 15118 Certificate Management and PnC Authorization |
✅ Support |
|
OCPP 2.1 |
ISO 15118-20, BPT, and Energy Synergy |
🚧 In Development |
3.4 Remote Maintenance and System Capabilities
|
Ability Category |
mSECC Specifications |
Compared to Typical 1st-Gen SECC |
|---|---|---|
|
Remote Server |
Connects directly to on-site mSECC via Schargenet remote maintenance server upon authorization. |
Upgrades on-site handling to remote maintenance. |
|
Remote OTA |
Remote deployment, installation, and version status management. |
No longer dependent on local CAN upgrades. |
|
Remote Log |
Collects, retrieves, and traces operation logs for issues. |
Addresses lack of remote logging capabilities. |
|
Remote Diagnosis |
Diagnoses online status, software version, links, and faults. |
Reduces engineer on-site trips. |
|
Local Management |
Local config, status view, and maintenance portal. |
Supports rapid on-site delivery and troubleshooting. |
|
Security Capability |
TLS, Certificates, Permissions, and Security Config Management. |
Establishes a sustainable foundation for security upgrades. |
4. Driver API Integration Scope
Customers only need to complete four types of business mappings:
-
Initialize the static configurations for the entire rod and the gun barrel.
-
Update insertion, charging, fault, and metering snapshots.
-
Report card swipe, start/stop, emergency stop, and local setting events.
-
Perform remote start/stop, reset, time synchronization, and availability control.
🔧 TCP connection establishment, disconnection reconnection, data framing, state synchronization, and protocol scheduling are handled internally by the Driver and mSECC.
5. Product Delivery and Service
mSECC delivers not just a protocol board, but a complete set of ready-to-deploy products.
|
Delivery Item |
Content |
|---|---|
|
Integration Package |
Source code or static library for the C language driver, along with public header files. |
|
Platform Adaptation |
FreeRTOS/lwIP OSAL Reference Implementation. |
|
Example Data |
Double-gun Demo, Interface Manual, and Minimum Call Sequence. |
|
Joint Testing Support |
mSECC Board Joint Testing, Log Analysis, and Problem Diagnosis. |
|
Mass Production Service |
Version baseline, issue closure, and upgrade support. |
Customers receive a complete solution covering everything from interface integration and prototype debugging to mass-production version management, rather than having to independently develop protocols or assemble systems from separate modules.
Schargenet Technology Co., Ltd. will continue to focus on EV communication protocols and intelligent charging control technology, providing global customers with high-performance, scalable, and future-oriented SECC solutions to help charging equipment quickly move towards intelligence, interconnectivity, and internationalization.
References
-
EU Authorisation Regulation (EU) 2025/656
-
Description of the ISO 15118-20:2022 standard
-
Open Charge Alliance: OCPP Version and Features Description