SS 722: Singapore Replaces TR 25 With Full National EV Charging Standard

Singapore has published SS 722, a multi-part national standard for electric vehicle charging systems that replaces Technical Reference 25 (TR 25), the provisional framework that has governed EV charger safety since 2010. The new standard, published on the Singapore Standards e-Shop under the purview of the Transportation Standards Committee, expands coverage into areas TR 25 never addressed — including cybersecurity, wireless power transfer, and battery swapping.

The elevation from a Technical Reference to a full Singapore Standard is more than a bureaucratic relabelling. It signals that EV charging in Singapore has matured from an emerging technology requiring stopgap rules to an established sector warranting permanent, consensus-based regulation.

From Provisional to Permanent

A Technical Reference under Enterprise Singapore's framework is deliberately provisional — issued without full consensus to address urgent industry needs, with a default three-year validity. A Singapore Standard, by contrast, requires broad stakeholder consensus and a two-month public review under World Trade Organization Technical Barriers to Trade rules before it can be gazetted.

TR 25 served Singapore well through the early years of EV adoption. First published in 2010, it was updated in 2016, overhauled significantly in March 2022 to accommodate higher charging power limits — raising the ceiling to 400 kW for CHAdeMO and 500 kW for CCS connectors — and further amended in February 2025. That 2022 revision was developed by a joint public-private working group over 16 months, reflecting how rapidly the charging landscape was evolving.

SS 722 takes the baton with four distinct parts. SS 722-1 covers electrical safety and general requirements. SS 722-2 addresses low-power AC charging (up to 2.3 kW) and wireless power transfer. SS 722-3 governs DC charging systems with rated voltages up to 1,500V DC. SS 722-4 breaks entirely new ground, establishing standards for battery swapping across motorcycles, passenger cars, and heavy goods vehicles, as well as mobile charging systems.

New Ground: Cybersecurity and Smart Charging

Perhaps the most forward-looking additions are the cybersecurity and smart grid integration requirements embedded in SS 722-2. As Singapore's charging network grows — the island had more than 5,700 charging points in early 2026, operated by SP Group, Shell Recharge, CDG ENGIE, Charge+, and others — the attack surface for connected infrastructure expands with it. Requiring cybersecurity measures at the standards level, rather than leaving it to individual operators, is a significant step.

Smart charging provisions also reflect where Singapore's grid management is heading. With the government targeting 60,000 charging points by 2030 under the national EV roadmap, the ability to manage when and how vehicles draw power from the grid becomes critical to avoiding demand spikes — particularly during evening peak hours when most drivers would plug in at home or in HDB carparks. For drivers curious about how charging behaviour affects long-term battery health, these grid-level standards work hand in hand with good individual charging habits.

Existing Chargers Safe — New Builds Must Comply

For the average EV driver in Singapore, the immediate impact is minimal. Existing chargers approved under TR 25 are unlikely to be pulled overnight — TR 25 documentation is still listed with "Current" status on the standards e-shop, suggesting a transition period is in effect. The charger you use at your HDB carpark or neighbourhood mall will continue to work as before.

The real implications sit with charging point operators and new market entrants. Any operator deploying new charging infrastructure will need to meet SS 722 requirements. For companies exploring battery swapping — an approach gaining traction for motorcycles and commercial fleets across Southeast Asia — SS 722-4 provides the first clear compliance pathway in Singapore. Mobile charging services, where a van brings a portable charger to your vehicle, now have a defined standard to build against as well.

A Quieter Kind of Milestone

No ministerial press conference accompanied the publication of SS 722. The standards appeared on the e-Shop without the fanfare that accompanied the TR 25:2022 overhaul four years ago. But the substance of the change is arguably more significant. Singapore is telling the market — and the region — that its EV charging rules are no longer provisional. They are settled national standards, developed through formal consensus, and built to last.

With SS 722 in place, Singapore positions itself among the first countries in ASEAN to have comprehensive, gazetted standards covering not just conventional plug-in charging but wireless power transfer, battery swapping, and the cybersecurity of charging networks. As the island works toward its 60,000-point target and operators like Charge+, SP Group, and Shell Recharge scale their networks, SS 722 provides the regulatory foundation that a maturing market requires.