2026-09-21 · KeXinMaterials Editorial Team
IEC 61851 EV Charging System + OCPP 2.0.1 + IEC 62443 Cybersecurity Deep Dive Protective Case B2B Guide
IEC 61851 "Electric vehicle conductive charging system" Edition 3 (2017 + Amd 1:2024) + OCPP 2.0.1 (2024) + IEC 62443 SL 1-4 + UN R155 CSMS are the modern EV charging system + cybersecurity standards. Required for global EV charging infrastructure + critical infrastructure EVSE + V2G + bidirectional charging. Below is the 2026 B2B procurement deep-dive covering IEC 61851 series + OCPP 2.0.1 + IEC 62443 SL 1-4 + UN R155 + market-specific approval + protective case requirements.
IEC 61851 Series + Charging Mode + Level + Control Pilot
IEC 61851-1 general + -21-23 specific + Mode 1-4 + Level 1-3 + control pilot + EVSE architecture + interoperability.
IEC 61851:2017 + Amd 1:2024: "Electric vehicle conductive charging system" Edition 3. Replaces Edition 2 (2010).
IEC 61851 series: Part 1 (general) + Part 21-1 (EV on-board charger EMC) + Part 22-1 (AC EVSE EMC) + Part 23-1 (DC EVSE) + Part 24-1 (DC EV-EVSE communication) + Part 31-1 (AC EVSE safety) + Part 32-1 (AC EVSE with free-standing LVDC) + Part 33-1 (AC EVSE with integrated AC/DC) + Part 34-1 (EVSE with integrated LVDC/AC for battery chargers) + Part 35-1 (wireless EV on-board charger) + Part 40-1 (wireless power transfer) + Part 41-1 (pantograph + megawatt charging for heavy-duty vehicles).
IEC 61851-1:2017 + Amd 1:2024 Edition 2: General requirements. Defines Mode 1-4 + Level 1-3 + control pilot + proximity pilot + EVSE architecture.
Mode 1 per IEC 61851-1: Slow AC charging. Standard outlet (Schuko + NEMA). Up to 16 A + 250 V AC + 4 kW. No control pilot. Legacy.
Mode 2 per IEC 61851-1: Slow AC charging. Standard outlet + IC-CPD (in-cable control + protection device). Up to 32 A + 250 V AC + 7 kW. Control pilot in cable.
Mode 3 per IEC 61851-1: AC charging via dedicated EVSE. Control pilot + protective earth. Up to 63 A + 480 V AC + 43 kW. Common residential + commercial.
Mode 4 per IEC 61851-1: DC charging via dedicated DC EVSE. Up to 1000 V DC + 400 A + 350 kW+ per CCS2. Public + commercial.
Level 1: 120 V AC + 16 A + 1.92 kW. US residential. SAE J1772.
Level 2: 240 V AC + 80 A (US) + 19.2 kW. US residential + commercial. SAE J1772.
Level 3: DC fast charging. 480 V DC + 100 A+ + 50 kW+. Public commercial + highway. CCS + CHAdeMO + GB/T.
Control Pilot (CP) per IEC 61851-1: Communication between EV + EVSE. PWM (pulse width modulation) signal. Determines charging state + max current + proximity detection + pilot signal levels (A = 6 mA / B = 0 mA / C = available current / D = with ventilation / E = error).
Proximity Pilot (PP) per IEC 62196-2: Mechanical detection of connector position + lock state. Resistance values indicate cable current rating.
EVSE architecture per IEC 61851: Connector (Type 1/2/3/4 + NACS + CHAdeMO + GB/T) + control box (RCD + overcurrent + surge protection) + control pilot circuitry + communication (PWM + PLC + ISO 15118 + OCPP) + metering (kWh + revenue per session).
EVSE connector + IEC 62196-2 Type 1/2 + Type 4 CCS Combo + NACS + CHAdeMO + GB/T + MCS.
B2B relevance: For B2B EV charging infrastructure cases, IEC 61851 compliance per Mode + Level + connector Type + market-specific approval is procurement requirement for residential + commercial + public + highway charging.
OCPP 2.0.1 + Smart Charging + Cybersecurity + OCA
OCPP 2.0.1 (2024) + smart charging + ISO 15118 PnC + cybersecurity + Open Charge Alliance + OCA certification.
OCPP (Open Charge Point Protocol): Open protocol for EVSE-backend communication. Per Open Charge Alliance (OCA). OCPP 1.6 (2015) + OCPP 2.0 (2018) + OCPP 2.0.1 (2024).
OCPP 1.6 (2015): Initial version. Charging transactions + remote control + firmware update + diagnostics + configuration. Widely adopted globally.
OCPP 2.0 (2018): Major revision. Adds smart charging profiles + ISO 15118 PnC + improved cybersecurity + transaction handling + display information + diagnostics + security + enhanced metering values + customer information.
OCPP 2.0.1 (2024): Latest. Adds improved security + smart charging 2.0 + OCPP 1.6 compatibility + improved customer info + improved display messages + improved firmware management + ISO 15118-20 Edition 2 support + IEC 62443 SL 1-4 compatibility + V2G + bidirectional charging support.
OCA (Open Charge Alliance): International non-profit promoting OCPP. Members: ABB + Siemens + Schneider + Wallbox + Alfen + ChargePoint + EVgo + Tesla + Allego + IONITY + Hubject + Stellantis + others. Over 400 members.
OCPP 2.0.1 features: (1) Smart Charging Profile per EV + per EVSE. (2) ISO 15118 PnC + EIM + V2G. (3) Security (TLS 1.3 + certificate-based + signed firmware updates). (4) Transaction handling (start + stop + transaction event). (5) Display messages per OCPP. (6) Firmware management (signed firmware update). (7) Diagnostics (status + error + log). (8) Enhanced metering values per OCPP 2.0.1. (9) Customer information. (10) Reservation per ISO 15118.
OCPP 2.0.1 + IEC 62443 SL 1-4: OCPP 2.0.1 includes security features aligned with IEC 62443 SL 1-4. EVSE is IACS component per IEC 62443-4-2. SL 1 minimum, SL 2 typical, SL 3-4 for critical infrastructure.
OCPP 2.0.1 + UN R155: OCPP 2.0.1 includes cybersecurity features aligned with UN R155 CSMS. EV + EVSE + backend + roaming all must comply with UN R155.
OCPP 2.0.1 + ISO 27001 + ISO 27017 + SOC 2: Backend + Hubject + roaming operators often certified to ISO 27001 + ISO 27017 + SOC 2 Type 2 for cloud security.
OCPP 2.0.1 certification: Per OCA. Self-declaration + OCPP 2.0.1 Conformance Testing via OCA test tool + certification by OCA.
OCPI (Open Charge Point Interface): Per EV Roaming Foundation. EVSE-backend + backend-roaming. OCPI 2.0 + 2.1 + 2.2. PnC + roaming + billing + settlement.
OICP (Open Intercharge Protocol): Per Hubject. Hubject-specific. Roaming + billing + settlement.
OCSP (Online Certificate Status Protocol) per ISO 15118: Certificate revocation check for PnC. RFC 6960. ECDSA + RSA + Ed25519 + PQC algorithms.
B2B relevance: For B2B EV charging infrastructure cases, OCPP 2.0.1 + ISO 15118 + IEC 62443 + UN R155 + OCPI/OICP + PnC + market approval is procurement requirement for modern EV charging ecosystem.
IEC 62443 SL 1-4 + UN R155 CSMS + ISO 21434 + Cybersecurity
IEC 62443 SL 1-4 + UN R155 CSMS + ISO 21434 + EV + EVSE + V2G + grid services + cybersecurity family.
IEC 62443 SL 1-4 per IEC 62443-3-3: Security Levels 1 (Casual) + 2 (Intentional Simple) + 3 (Intentional Sophisticated) + 4 (Coordinated). For EVSE as IACS component.
IEC 62443 SL 1 (Casual): Protection against casual + coincidental. Low motivation + general IT skills.
IEC 62443 SL 2 (Intentional Simple): Intentional violation with simple means + low resources. Common for EVSE.
IEC 62443 SL 3 (Intentional Sophisticated): Sophisticated means + moderate resources. For critical infrastructure EVSE.
IEC 62443 SL 4 (Coordinated): Sophisticated + extensive resources + APT. For national security EVSE.
IEC 62443-4-2 component requirements: Per EVSE component. CR per FR (Foundational Requirement). CR1 (Identification + Authentication) + CR2 (Use Control) + CR3 (System Integrity) + CR4 (Data Confidentiality) + CR5 (Restricted Data Flow) + CR6 (Timely Response to Events) + CR7 (Resource Availability).
IEC 62443-3-3 system requirements: Per EVSE system. SR per FR. SR 1.1 + 1.2 + 2.1 + 2.8 + 3.1 + 5.1 + 5.2 + 6.1 + 6.2 + 7.1 + 7.3 + 7.4.
UN R155 (Cyber Security Management System CSMS): UN regulation 155. Effective July 2022 (new types) + July 2024 (all registrations). Required for automotive OEMs + EVSE.
UN R155 CSMS requirements: Risk assessment + cybersecurity policies + incident response + business continuity + supply chain security + vulnerability handling + cryptographic + access control + effectiveness assessment.
UN R156 (Software Update Management System SUMS): UN regulation 156. OTA software update management. Effective July 2022.
ISO 21434: "Road vehicles - Cybersecurity engineering". Edition 1 (2021). For automotive + EV. Cybersecurity engineering throughout product lifecycle.
ISO 21434 cybersecurity lifecycle: Concept + development + production + operation + maintenance + decommissioning. TARA (Threat Analysis + Risk Assessment) + cybersecurity controls + verification + testing.
EV + EVSE + V2G + grid integration cybersecurity: EV + EVSE + backend + roaming hub + grid operator. Per ISO 21434 + UN R155 + IEC 62443 + ISO 27001 + ISO 27017 + ISO 27018 + SOC 2 + EU CRA + NIST CSF 2.0.
B2B relevance: For B2B EV charging infrastructure cases with PnC + V2G + bidirectional charging, IEC 62443 SL 2 + UN R155 CSMS + ISO 21434 + ISO 15118 PnC + ISO 27001 + IEC 61850 + market-specific approval is procurement requirement for global critical infrastructure EV charging.
Key Takeaways
- IEC 61851:2017 + Amd 1:2024 Edition 3 is EV conductive charging system. Mode 1-4 + Level 1-3. 12 parts including AC + DC + wireless + pantograph + megawatt charging.
- OCPP 2.0.1 (2024) per OCA. Smart charging + ISO 15118 PnC + IEC 62443 SL 1-4 + V2G + bidirectional charging + OCPI 2.2 + OICP.
- IEC 62443 SL 1-4 per IEC 62443-3-3 + IEC 62443-4-2 component. EVSE requires SL 2 typical + SL 3-4 for critical infrastructure.
- UN R155 CSMS effective July 2022 (new types) + July 2024 (all registrations). UN R156 SUMS. Required for automotive OEMs + EVSE.
- Cybersecurity: IEC 62443 + ISO 15118 + ISO 21434 + UN R155 + ISO 27001 + ISO 27017 + ISO 27018 + SOC 2 + EU CRA + NIST CSF 2.0.
- B2B recommendation: For B2B EV charging case, require IEC 62196 + IEC 61851 + ISO 15118 PnC + V2G + OCPP 2.0.1 + IEC 62443 SL 2 + UN R155 + ISO 21434 + IEC 61850 + market-specific + Hubject + OCPI.
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