TR 25 and SS 722: Singapore's EV Charging Standard, Explained
What TR 25 was, and what changed
TR 25 — Technical Reference 25 — set out how EV charging systems should be designed, installed, maintained and operated in Singapore. It is what "TR25-compliant" on a quote has meant for years: the charger is wired, protected and earthed to the national reference rather than to whatever the installer felt like doing.
A Technical Reference is a provisional document. On 1 April 2026 TR 25:2022 was elevated to a full Singapore Standard, SS 722, overseen by the Singapore Standards Council with support from Enterprise Singapore and the Land Transport Authority. Same lineage, higher status, wider scope.
What SS 722 adds
SS 722 keeps the design, installation, maintenance and operation guidance and extends into areas TR 25 never addressed. Three of those matter to anyone specifying a charger today.
- Cybersecurity — chargers are networked devices, and until now the national reference said nothing about it
- Wireless power transfer — charging without a cable, ahead of it arriving here in volume
- Battery swapping — treated as charging infrastructure in its own right
The date that actually matters: 1 October 2028
There is a transition period of two and a half years from the standard taking effect. Compliance with SS 722 becomes mandatory for new chargers on 1 October 2028.
That is not a deadline for you if you are installing at home this year — it is a deadline for the industry. What it means in practice is that a charger specified today against TR 25 is entirely legitimate, and a charger specified in 2029 will not be. If you are planning a commercial rollout in phases across the next two years, the standard your later phases are built to is worth deciding now rather than in 2028.
Do I need to do anything to a charger I already own?
No. Chargers already type-approved under the EV Charging Act on the basis of TR 25 do not need to be re-certified to SS 722. Nobody is going to make you replace a working, approved charger.
If someone tells you otherwise and offers to sell you the fix, that is a sales tactic, not a regulation.
What to ask an installer
- Which standard is this install being carried out to — TR 25 or SS 722?
- Is the unit type-approved under the EV Charging Act, and can I see the approval?
- Who is the Licensed Electrical Worker, and will I get a Certificate of Fitness?
- Is the charger on its own protected circuit with RCD or RCBO protection?
- For a phased commercial rollout: which standard will the later phases be built to?
Frequently asked questions
Is SS 722 the same as TR 25?
It is TR 25 grown up. TR 25:2022 was a Technical Reference — a provisional national document — and on 1 April 2026 it was elevated to Singapore Standard SS 722. The design, installation, maintenance and operation guidance carries over, and the standard now also covers cybersecurity, wireless power transfer and battery swapping.
When does SS 722 become mandatory?
1 October 2028, for new chargers. The standard took effect on 1 April 2026 with a transition period of two and a half years. Between now and then, TR 25 remains a legitimate basis for an installation.
Does my existing charger need to be re-certified?
No. Chargers already type-approved under the EV Charging Act against TR 25 do not need re-certifying to SS 722. If you have an approved, working charger, this change does not create a job for you.
Should I wait until 2028 to install?
No, and we would say the same if it cost us the job. A charger installed to TR 25 today is compliant today and stays approved. Waiting two years to charge at home costs you two years of home charging, which is a far more concrete loss than a standards revision you are not required to meet.
How do I know my installer is actually working to the standard?
Ask for the Licensed Electrical Worker's details and the Certificate of Fitness, and ask which standard the install is carried out to. A compliant install is on its own protected circuit with RCD or RCBO protection, using a type-approved unit, and it is registered with LTA. Every one of those is checkable — if an installer cannot produce them, that tells you what you need to know.