SS 722: what Singapore's new EV charging standard means for depot operators.

From Technical Reference to Singapore Standard

The previous document — Technical Reference 25 (TR25:2022) — was authoritative in practice but classified as a TR, the lighter-weight category Singapore Standards uses for fast-moving technical areas. SS 722 takes that body of work and elevates it to a full Singapore Standard (SS) under the Enterprise Singapore Singapore Standards Council, with standard development managed by the Institution of Engineers, Singapore – Standards Development Organisation, and supported by the Land Transport Authority.

The substantive effect for operators is twofold: the standard is now harder to displace as the reference benchmark, and the scope has materially expanded.

What's new in the scope

SS 722 widens what's covered in five meaningful ways:

• · Wireless Power Transfer (WPT) systems for four-wheeled vehicles — newly addressed as Part 2.
• · DC charging revisions in Part 3: stricter temperature controls, enhanced integrity checks on cable insulation, and more precise power-output requirements.
• · Battery charge-and-swap and mobile charging systems — newly covered, including for electric heavy goods vehicles (eHGV).
• · Cybersecurity requirements for Charging Station Management Systems (CSMS) — a layer that wasn't formally specified before.
• · Smart-grid integration guidance — formal recognition that chargers operate as nodes in a wider energy system, not standalone equipment.

The 2025 amendment also aligned AC charging requirements with the latest IEC electromagnetic compatibility standards, and updated the definition of restricted-access locations to include townhouses (relevant for some private fleets).

What it means for existing depot infrastructure

The transition was designed to avoid forcing operators to rip out installed equipment:

• · Existing chargers type-approved under TR 25 do not need to be re-certified. What's installed and in service stays in service.
• · A 2.5-year transition window applies before SS 722 compliance becomes mandatory for new chargers. In practice, that means the back-end of 2028 is the realistic hard cut-over date for new procurement.

So today's depot fleet is grandfathered, but anything being specified now for delivery 12–24 months out should be written against SS 722 — both because it will be mandatory by then, and because the standard now sets the safety and interoperability expectations the rest of the supply chain will align to.

Five actions for depot operators

What changes practically over the next planning cycle:

• · Specify SS 722 in new RFQs, even ahead of the mandate. Suppliers shipping into Singapore are reorganising around the new standard anyway — asking for it upfront avoids retrofit cost later and signals you're a serious counterparty.
• · Ask CSMS vendors about their cybersecurity posture. SS 722's CSMS cybersecurity requirements are the first time this layer is formally codified locally. Vendors who can't articulate their security model concretely are a procurement risk — not just for compliance, but for operational uptime.
• · Review DC charger maintenance against the tightened spec. The new DC requirements (cable-insulation integrity checks, temperature controls, power-output precision) imply inspection intervals and instrumentation that some existing service contracts may not cover. Worth a conversation with whoever maintains your DC chargers today.
• · Treat smart-grid integration as a design constraint, not an add-on. SS 722's recognition of chargers as grid-integrated nodes aligns with what the energy side of the system is moving toward. Depots that wire charger control into a site-level energy management system from day one will spend less retrofitting later (see also our hero piece, Beyond chargers: solving Singapore's industrial energy capacity challenge).
• · Watch the WPT and battery-swap clauses, but with calibrated expectations. SS 722 now formally covers both, which prepares the regulatory ground. Standards coverage and commercial viability are different things, though. Battery-swap in particular sits on a structural challenge the standard alone doesn't solve: each fleet typically runs on its own battery-pack design — different chemistries, form factors, voltage envelopes, BMS protocols, connector geometries — so a swap station tuned for one operator's vehicles isn't trivially shareable across operators. Swap infrastructure economics generally only pay back at high utilisation across many vehicles, which makes single-fleet captive swap stations a hard payback question until cross-OEM agreement on pack architecture emerges. WPT has a different shape of problem (alignment tolerance, efficiency over the air-gap, peak-power constraints) but is more naturally a one-vehicle-to-one-station relationship. Both are worth tracking for narrow use cases — port equipment, fixed-route shuttles, short-loop logistics — but neither should be the default assumption for depot scope inside the 2.5-year transition.

How EVhubs reads this

From the perspective of an industrial fleet or estate operator, SS 722 is a raise of the floor — safer chargers, defined cybersecurity expectations, explicit smart-grid hooks. None of it changes the central question we keep pointing to: do you have the energy capacity, orchestration and integration to actually run the chargers you're allowed to install?

SS 722 is the new spec sheet. Whether your depot is ready to run against it is a separate question — one that turns on grid capacity, BESS sizing, EMS integration and the wider Industrial Energy Hub architecture.

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Sources & methodology: Facts on SS 722 scope, effective date and transition window cited from the joint LTA & Enterprise Singapore release (March 2026) and the corresponding Enterprise Singapore announcement. The full SS 722 standard text is available through the Singapore Standards eShop (paywalled); this article summarises publicly available scope and transition details and should not be treated as authoritative interpretation of the standard. Specific clause-level requirements, type-approval procedures, and inspection cadences should be verified directly with LTA, Enterprise Singapore, or an accredited test body such as TÜV SÜD PSB before they inform compliance or procurement decisions.