To support the continued expansion of Singapore’s electric vehicle (EV) charging network and the adoption of emerging charging technologies, the national EV charging standard, Technical Reference 25 (TR25:2022) will be elevated to a Singapore Standard, SS 722 with effect from 1 April 2026. The standard will also be expanded to include updated specifications and guidelines for the design, installation, maintenance and operation of EV charging systems in Singapore to enhance their safety and reliability. This elevation also supports the continued expansion of Singapore's charging network through standardised technical practices that ensure consistent quality across charging stations island-wide.
2. The upgrade to SS 722 follows a review undertaken by a public-private Working Group[1] appointed by the Singapore Standards Council, overseen by Enterprise Singapore, and supported by the Land Transport Authority. The Institution of Engineers, Singapore – Standards Development Organisation managed the development of this standard. The review examined the need for emerging charging solutions within the evolving EV landscape and specific infrastructure requirements to ensure the safe installation, maintenance and operation of charging stations.
3. The key changes and expanded scope introduced in SS 722 are summarised below.
a. Part 1 – Electrical Safety and General Requirements
· This covers the general requirements for EV charging systems and has been updated to cater for new types of EV charging systems such as wireless charging stations, mobile charging systems, and battery charge and swap stations for four-wheeled vehicles.
b. Part 2 – Low-Powered Charging and Wireless Power Transfer (WPT) Systems
· Under the new standard, vehicles fitted with a dedicated wireless power receiver can be charged simply by parking over a charging pad, without needing to plug into a charging station. The standard includes safety requirements to ensure that wireless EV charging stations operate safely and do not pose any safety hazards to drivers or the public.
· It includes cybersecurity requirements for Charging Station Management Systems and electric vehicle charging equipment communications to protect charging infrastructure.
· It also provides guidance on smart grid integration and supports smart charging capabilities for more efficient energy management.
c. Part 3 – Direct Current (DC) EV Charging System
· Part 3 focuses on DC charging stations and has been updated to align with the latest International Electrotechnical Commission (IEC) standard. The updated requirements call for stricter temperature controls, enhanced integrity checks on cable insulation, and more precise power output. Together, these improvements create a safer and more reliable charging experience for EV users.
d. Part 4 – Battery Swapping and Mobile Charging System
· On top of existing specifications for electric motorcycles, the new standard will cover battery charge and swap stations for four-wheelers, such as electric heavy goods vehicles (eHGV).
· It will also introduce requirements for mobile EV charging systems – DC EV chargers connected to a battery system and mounted on a vehicle such as a van or truck – that can provide on-demand charging at any location.
· Battery testing requirements are included to ensure the safety and reliability of the battery systems.
4. Chargers that have already been type-approved under the EV Charging Act based on the earlier TR 25 standards do not need to be re-certified to the new SS standard. There will be a transition period of two and a half years before compliance with SS 722 becomes mandatory for new chargers.
5. SS 722 can be purchased from the Singapore Standards eShop at www.singaporestandardseshop.sg.
About Technical Reference 25
The Technical Reference 25 (TR 25) was introduced in 2010 to set technical safety requirements for EV charging in Singapore and has been progressively updated as EV technologies evolved. Notably, its scope was expanded in the 2022 revision to cover higher powered charging, battery swapping for electric motorcycles, and periodic inspections by equipment specialists. The most recent amendment in 2025 aligned AC charging requirements with updated international IEC electromagnetic compatibility standards and revised the definition of restricted access locations to include townhouses.
Annex A: List of Working Group Members
