Quick Reference: SECC vs. EVCC
| Feature | SECC | EVCC |
|---|---|---|
| Full Name | Supply Equipment Communication Controller | Electric Vehicle Communication Controller |
| Location | Charging station (EVSE) | Inside the electric vehicle |
| Role | Initiates HLC session | Responds to HLC session |
| Protocols | ISO 15118, DIN 70121, IEC 61851 | ISO 15118, DIN 70121, SAE, CHAdeMO |
| Interface | CAN to CCU, PLC via CP line | CAN to BMS/OBC, PLC via CP line |
AC SECC vs. DC SECC
AC SECC enables ISO 15118-2 smart charging on AC wallboxes, Plug and Charge, and smart grid integration. Often integrated directly onto the AC charger motherboard. DC SECC handles DIN 70121 (minimum for CCS2 in Europe), ISO 15118-2/20, and V2G. Typically a standalone PCB module connecting to the CCU via CAN bus.
The PLC Communication Module: How It Works
Physical communication uses HomePlug GreenPHY (HPGP) PLC modulated onto the existing Control Pilot (CP) line — no additional wires needed. A PLC communication module for EV charger includes: HomePlug GreenPHY chip, coupling circuit for CP line, MCU (STM32) running the protocol stack, and CAN interface to the CCU.
DIN 70121 Communication Module: Still Relevant?
Yes. Millions of European EVs only implement DIN 70121. European DC charger conformance testing requires it. Share Charging’s SECC simultaneously supports DIN 70121 and ISO 15118, automatically selecting the right protocol based on vehicle capability.
Share Charging SECC/EVCC Product Summary
| Product | Protocols | Market |
|---|---|---|
| AC SECC PLC Module | ISO 15118-2, IEC 61851-1 | Smart AC wallbox, commercial AC charger |
| DC SECC QC PLC Module | ISO 15118-2/20, DIN 70121, CCS1/CCS2 | DC fast charger (40–1600 kW) |
| EVCC Module | ISO 15118, DIN 70121, SAE, CHAdeMO | EV vehicle side (Chinese NEV export) |
All SECC modules are TÜV Rheinland and DEKRA certified — the first in China to achieve this dual certification.
Get your SECC/EVCC modules: zhaishuoyun@share-charging.com | WhatsApp: +8615253120062
Explore SECC & EVCC Products →Understand the difference between EVCC and SECC in EV charging. How AC and DC SECC modules work, DIN 70121 communication, and how to integrate PLC into your charger design.
