Letter of No Objection

The Land Transport Authority (LTA) will support the verification of Electric Vehicle Supply Equipment (EVSE) test reports and relevant documents, in compliance with the EV charging standard TR 25. A letter of no objection (LNO) will be issued if a EVSE is verified to comply with TR 25. 

Application for LNOs under TR 25:2016

Applications for LNOs based on the older TR 25:2016 will continue to be accepted for a period of two years after the publication date of TR 25:2022 on 28 February 2022. The exact cut-off date will be announced closer to 2024.

Application for LNOs under TR 25:2022

Charger manufacturers and dealers who wish to apply for LNO for new chargers covered under TR 25:2022 will need to work with testing, inspection, and certification companies (TICs) to test their chargers and obtain a Certificate of Conformity (CoC) based on TR 25:2022. Test reports should demonstrate that the charger is able to comply with the requirements in Part 1, and the relevant Parts 2/3/4 of TR 25:2022, where applicable. Test reports based on other standards alone (e.g. IEC 60335) do not equate to compliance with TR 25:2022, as they do not test for the full suite of relevant requirements and are thus not acceptable for LNO application. 

All test reports should be issued by a test lab accredited by the Singapore Accreditation Council (SAC) or its mutually recognition arrangement (MRA) partners from the International Laboratory Accreditation Corporation (ILAC). Likewise, CoCs should be issued by a certification body accredited by SAC or its MLA-partner from the International Accreditation Forum (IAF). More details can be found here.   

The required parts to be complied with depends on the type of charger, as shown in the following examples:

Type of Charger TR 25:2022 Parts Required
Portable AC charger (mode 2) with rated output power above 2.3kW Part 1 only, or to test based on TR 25:2016
Portable low power charger with rated output power not exceeding 2.3kW (i.e. mode 2A & 2B) Part 1 & Part 2
Fixed high power charger with rated output power 150kW and above and using thermal management system (such as liquid cooled cables) Part 1 & Part 3 
Fixed high power charger with rated output power 150kW and above and using automated charging device (ACD) Part 1 & Part 3 
Battery swap system for e-motorcycles  Part 1 & Part 4 


The examples above are not exhaustive. Parts required depends on the charger's capabilities. For example, a battery swap system that also provides low power charging may also need to be able to meet Part 2. You should test your charger based on the requirements specified in TR 25:2022.   You should consult an accredited TIC for advice on the relevant test requirements.      

Accreditation to Test for TR 25:2022

TICs will take about 15 - 18 months to get accredited by national accreditation bodies (e.g. Singapore Accreditation Council (SAC) for local TICs) to perform testing and certification based on TR 25:2022. LTA is currently engaging TICs to support them to obtain the necessary accreditation. The list of accredited TICs that can test for TR 25:2022 will be updated here when ready. 

Requirements for LNO Application 

Please refer to EMA’s website for further details on the requirements to apply for an LNO. 

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