EV Charger Inspection Services

Electric Vehicle Charger Inspections

Periodic EV Charger Safety Inspection Regime

Periodic EV Charger Safety Inspection Regime

Electric vehicle charging stations are repeatedly used by many drivers and installed in areas where they might be exposed to climatic influences. Being exposed to such climatic factors, these charging stations have a high chance of getting damaged. Over time, the components in the charging stations may reach the end of their lifecycle and connections may loosen or corrode.

The wear and tear of your charging stations will increase the risks of electrical hazards, which might result in fire or electric shock. Periodic inspection after installation is recommended to ensure that your charging stations are in good condition and safe for usage.

Why are electric vehicle charger inspections required?

Governing bodies in different countries have different requirements to ensure proper installation and maintenance of the charging stations for Electric Vehicles. In Singapore, a nationwide electric vehicle (EV) charging standard, Technical Reference 25 (TR 25), was established in 2010 to provide technical safety requirements for EV charging systems (EVCS). The latest version of the technical reference is TR 25:2022. Under the proper Installation of EV Chargers, companies must engage a Licensed Electrical Worker (LEW) and an equipment specialist to install, test, and certify the fitness of the EV Charging System (EVCS) installation before it is put into service.

The owner is responsible for the safe use and operation of the EVCS. Regular maintenance, electrical safety inspection and testing should be carried out on the EVCS according to TR 25:2022 to ensure safety. A record of the inspections must be kept and produced to Land Transport Authority (LTA) when required.

You may refer to the table below on the on-site inspection required.

EV Charging System Periodic Inspection


The testing and product certification services of TÜV SÜD PSB conform to stringent quality requirements of ISO/IEC 17025 and ISO/IEC 17065.

TÜV SÜD provides internationally accredited independent conformity assessment in accordance with TR25 requirements for periodic inspection of EVCS using EV Charger Tester, Measurement devices & Diagnostics equipment. We are able to simulate vehicle signals, communication protocols and load circuits on-site. We will conduct periodic tests and inspections for EVCS and present the on-site test report. Companies can better understand the charger’s performance through the data and waveform presented in the report, on top of the TR25 checklist.

TÜV SÜD also provides an option to apply for the TÜV Mark on the EV charger after successfully completing the test. By affixing the TÜV Mark, it adds confidence and assurance to users when using the EVCS.

Electric Vehicle Charger Inspections Singapore


Why choose TÜV SÜD

TÜV SÜD is recognised as a global leader in e-Mobility. Our team of multidisciplinary experts leverages extensive experience in the areas of automotive, infrastructure, battery and alternative energy concepts to help top industry players develop and test e-Mobility technologies.

We offer a worldwide network of state-of-the-art accredited laboratories to assist you in testing your products and overcoming challenges. Furthermore, the international reputation of TÜV SÜD as an independent and impartial third-party assessor will help to instil confidence in the quality and safety of your products.

Your benefits at a glance

  • Save time and money – by leveraging on an international laboratory network that can conduct testing in several countries at the same time and issue global certifications.
  • Benefit from worldwide support – through an international sales and testing network that can collaborate with you in key markets.
  • Access a one-stop solution – with a single point of contact for a complete range of testing and certification services that extend throughout the value chain, from component to final product.
  • Minimise risk – by making use of an independent testing partner to ensure compliance with statutory and regulatory requirements.




  • How frequently should EV charging stations undergo periodic inspections?

    Although the frequency of EV charging station inspections can vary depending on usage and environmental factors, EV charging stations must undergo annual periodic inspections and testing.
    In Singapore, under TR 25:2022, EV chargers for public use must be inspected by an equipment specialist once every six months and annually by a skilled person. It is recommended that EV chargers for private use be inspected by an equipment specialist once every 24 months.


  • What specific components of an EV charging system are inspected periodically?

    A comprehensive EV charging system inspection comprises the following components:

    • Electrical components: This includes cables, connectors, circuit breakers, transformers, and other electrical infrastructure, checking for signs of wear, damage, or overheating.
    • Grounding and bonding: Verifying proper grounding and bonding connections are secure and meet safety regulations.
    • Communication systems: Ensuring communication protocols between the charger and user interface or management systems function correctly.
    • Physical integrity: Inspect for any physical damage to the charging station housing, cables, and other hardware components.
    • Software and firmware: Verifying the software and firmware are up-to-date and functioning as intended.

    Under TR 25:2022 for Periodic Inspection, a series of detailed tests are conducted to ensure the EV charger's utmost safety and reliability.

    1. Document Reviews (Type Approval, Operational Manual)
    2. External Environmental Inspection
    3. Resistance measurement for pilot control
    4. Functionality Test
    5. Under Normal Conditions Start Stop Charging Sequence Test
    6. Abnormal Shock Circuit Simulation Test
    7. Tripping Test for RCCD
    8. Earth Loop Impedance Test
    9. Insulation Resistance Test

  • Can TÜV SÜD assist with compliance documentation and reporting after an inspection?

    TÜV SÜD can assist with compliance documentation and reporting after an EV charger inspection. We provide internationally accredited independent conformity assessment under TR25 requirements for periodic inspection of EVCS using an EV charger tester, measurement devices, and diagnostics equipment. We also present the on-site test report, which helps companies better understand the charger's performance.

    For EV chargers that comply with the TR25 requirements, TÜV SÜD can issue a TUV Mark after periodic inspection for affixing on the charger, giving users and operators additional assurance.


  • Are there any common issues or failures found during EV charger periodic inspections?

    During EV charger periodic inspections, common problems identified include:

    • Defective connections
    • Incorrect installation
    • Improper earthing
    • Hardware flaws
    • Long-term wear and tear

    The components in the charging stations may reach the end of their lifecycle, and connections may loosen or corrode over time.


  • How does regular inspection contribute to the safety and reliability of EV charging infrastructure?

    Routine inspections help identify flaws before they cause injury or damage. They also help maintain the performance of the charge points and ensure regulatory compliance. They validate that the charging stations are in satisfactory condition and safe to use, improving the safety and dependability of the EV charging infrastructure.


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