EV charging standards and protocols are the technical frameworks that enable seamless, safe, and efficient energy transfer between the electric grid, charging hardware, and vehicles. They ensure interoperability by allowing drivers to charge any compatible EV at any public or private charging station without hassle. As Singapore accelerates toward its 2040 goal of phasing out internal combustion engine vehicles, understanding EV charging standards and protocols becomes crucial for infrastructure developers, property owners, and fleet operators. This technical guide examines the current landscape of charging standards in Singapore, regulatory requirements, and emerging protocol developments shaping the market in 2025.
TL;DR - A Guide to EV Charging Standards
- Primary Connector Types: CCS2 (Combined Charging System Type 2) dominates, with CHAdeMO and GB/T for specific vehicle segments
- AC Charging Standards: Type 2 (IEC 62196-2) universally adopted for Level 2 charging applications
- DC Fast Charging: CCS2 leads market adoption, CHAdeMO for Japanese vehicles, GB/T gaining traction with Chinese EVs
- Communication Protocols: OCPP 1.6J/2.0.1 mandated for interoperability, ISO 15118 emerging for advanced features
- Safety Standards: IEC 61851 series compliance required, local adaptations through SS CP5 electrical code
- Network Interoperability: OCPI protocol enables roaming between charging networks
- Future Technologies: Wireless charging pilots, bidirectional charging development, and ultra-fast charging deployment
Singapore's Updated TR 25 National Standard
Singapore's national EV charging standard, Technical Reference 25 (TR 25), has undergone significant enhancements to reflect the latest global best practices and safety requirements. The most recent version, TR 25:2022, establishes technical and safety benchmarks for EV charging systems across the country. New charger modes include two low-power modes - Mode 2A and Mode 2B - to support portable chargers and detachable batteries at common 15A outlets. The standard has also been updated to reflect higher power capacity, increasing to 400 kW for CHAdeMO and 500 kW for CCS systems, paving the way for ultra-fast charging adoption in Singapore.
Regulatory Safety and Licensing Under the EV Charging Act
The Electric Vehicles Charging Act (2022), enforced from December 2023, provides a robust legal framework for EV charging in Singapore. Charger certification requires that all deployed chargers must be type-approved and registered with the LTA or risk significant fines. Operator licensing means public charging service providers must be licensed and adhere to uptime, insurance, and data sharing requirements. Building mandates mean that developments involving new or expanded building or electrical works must now include passive (spare capacity) and, in many cases, active EV charging provisions.
Key Communication Protocols
OCPP (Open Charge Point Protocol): The backbone of charger-to-backend communication, OCPP is mandated by Singapore's regulatory framework for interoperability. OCPP 1.6J remains the most widely deployed version in Singapore, while OCPP 2.0.1 is gaining traction as operators upgrade their systems for enhanced security, better device management, and support for advanced features like Plug and Charge. Understanding the differences between OCPP versions and planning upgrade paths is increasingly important for operators and property managers.
OCPI (Open Charge Point Interface): OCPI enables roaming between charging networks, allowing drivers to access chargers from different operators using a single app or account. As Singapore's charging ecosystem grows increasingly multi-operator, OCPI adoption is expanding to facilitate interoperability and create a more seamless charging experience for EV drivers.
ISO 15118 (Plug and Charge): Emerging as a key enabler of advanced EV charging features, ISO 15118 enables the vehicle and charger to communicate directly to authenticate and initiate charging automatically. This eliminates the need for RFID cards or smartphone apps to start a session. While still in the early stages of deployment in Singapore, ISO 15118 support is increasingly being included in newer charger models and backend systems.
Connector Standards in Singapore
Singapore has standardized on CCS2 (Combined Charging System Type 2) as the primary connector for DC fast charging, aligning with European and many Asian markets. For AC charging, the Type 2 (IEC 62196-2) connector is the de facto standard across residential, commercial, and public charging installations. CHAdeMO connectors are still present, primarily to support Japanese EV brands, while GB/T connectors are gaining presence alongside the growing number of Chinese EV models entering the Singapore market.
Future Technologies Shaping Singapore's EV Charging Landscape
Looking beyond current deployments, several emerging technologies are beginning to influence how EV charging infrastructure is planned and implemented in Singapore. Wireless or inductive charging is moving from pilot to early commercial deployments. Bidirectional charging or Vehicle-to-Grid (V2G) technology is advancing rapidly, with Singapore exploring its potential as a grid resource. Ultra-fast charging systems capable of delivering 150 kW to 350 kW and beyond are being deployed at key locations to address range anxiety and match the capabilities of next-generation EVs.
For infrastructure developers, property managers, and fleet operators in Singapore, staying informed about evolving standards is essential not just for compliance, but for making investment decisions that remain viable as technology and regulations evolve. Eigen Digital helps operators navigate this complex landscape, from protocol implementation to ongoing management and optimization. Contact us to learn how we can support your EV charging strategy in Singapore.
