OGS Hybrid & EV Repair

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ELECTRIC & HYBRID HIGH-VOLTAGE SAFETY CHECKS – CERTIFIED IMI TECH-SAFE™ (UK) 

Book your electric or hybrid vehicle high-voltage safety check with IMI TechSafe™-certified UK garage from £149+VAT.

Detailed battery health report, HSE & UNECE compliant.

Quotes & Workshop Appointments

Looking for a quote or would you like to arrange a workshop appointment for a high-voltage safety check or any of our other EV and hybrid services? Please complete our workshop enquiry form.

Submit a Workshop Enquiry

Other Enquiries

For general questions or any other enquiries, please contact us by email.

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Keep Your EV or Hybrid Safe, Compliant, and Reliable

Our garage provides specialist high-voltage safety checks for electric and hybrid vehicles, ensuring every system is maintained, tested, and documented to strict UK standards (Health and Safety Executive, HSE GS44/HSG261). 

Every service is completed by IMI TechSafe™-certified technicians using calibrated equipment and meets manufacturer and insurer requirements. 

WHY BOOK AN EV/HYBRID HIGH-VOLTAGE SAFETY CHECK? 

  • Battery Health, Warranty & Resale Value: Detect early degradation, protect high resale value, and keep your battery warranty valid. 
  • Strict Legal Compliance: Our reports meet all HSE GS44 automotive electrical compliance and UNECE R100 certification demands. 
  • Peace of Mind: Every check is signed, time-stamped, and independently verified—accepted by leading UK insurers, lease companies, and car finance teams. 

WHAT’S INCLUDED? (SAFETY PROCESS & REPORT) 

  • Certified isolation of all high-voltage circuits (400–800V+)

    Performed using IMI TechSafe™ methodology and calibrated test gear to ensure technician and vehicle safety.

  • State-of-Health (SOH) battery test

    Measures capacity, identifies degradation, internal faults and DTCs using official OEM diagnostic tools.

  • Full electrical system diagnostics

    Includes insulation resistance testing (>1 MΩ at 500V), moisture ingress checks and detection of wiring/cable faults.

  • Thermal imaging scan

    Thermal inspection of the battery pack and connections to reveal hidden hot-spots and thermal risks.

  • Type 2 / Mode 3 EV charger test

    Verifies safe charge/discharge operation and compatibility with onboard systems.

  • 12V battery system integrity test

    Checks 12V supply for non-start conditions and computer-save circuits to prevent data loss or faults.

  • High-voltage system lockout/tagout procedures

    Established protocols to secure both staff and vehicle during inspection and repair activities.

  • Post-repair full system verification

    Comprehensive validation with documented compliance against HSE, and OEM ERG requirements.

  • Digital, insurer-recognised certificate

    Includes a clear pass/fail summary for records, warranties and insurance purposes.

*Sample certificate available request via phone/email. 

WHO RELIES ON OUR SERVICE?

  • Private owners (peace of mind, warranty, pre-sale)
  • Leasing & fleet companies (compliance, handback, asset protection)
  • Dealers prepping used/premium EV stock
  • Post-incident specialists (accident, fire, or flood recovery—official ERG protocol)
  • Insurers, claims assessors, and finance providers

WHY TRUST US?

  • IMI TechSafe™ accredited technicians (cert numbers & badge on request)
  • All test equipment recently calibrated—certificates available
  • Strict process: lockout/tagout, insulated tools, PPE, double sign-off for every check
  • No hidden extras: all fees transparent, every step documented

HOW TO BOOK

  • Submit a workshop enquiry or use the chat to book an appointment.
  • Bring your vehicle to our certified garage at the appointed time—no mobile work offered. 
  • Our technician completes inspection & issue your digital report/certificate on the same day. 
  • If further repairs are needed, you’ll get a root-cause breakdown and a fixed quote with no obligation. 
Submit a Workshop Enquiry

Frequently Asked Questions

What is a high-voltage safety check and why is it essential for EVs and hybrids?
A high-voltage safety check is a rigorous inspection and isolation procedure for your vehicle’s battery and electrical systems, performed by certified technicians. It’s critical because EVs and hybrids operate at voltages (400–800V+) sufficient to cause fatal injuries without proper precautions. Our process follows HSE GS44 and HSG261 guidance and IMI TechSafe™ standards, including certified isolation, insulation resistance tests, and terminal/charger checks—minimising risk to you and protecting your warranty and insurance rights.
Is this check legally required to keep my car warranty or insurance valid?
While there is no direct legal requirement in the UK mandating a high-voltage safety check, many vehicle manufacturers and insurance providers may require an annual or pre-claim high-voltage inspection report issued by a recognised workshop using calibrated tools. Missing these checks or using unqualified garages can risk your coverage for electrical or battery-related claims. Our certificates meet current IMI TechSafe™ accreditation standards and are accepted by major UK warranty and insurance networks.
What high-voltage battery problems are most common in used EVs and hybrids?
Typical issues include capacity degradation, individual cell faults, cooling failures, water ingress, and wiring insulation breakdown. Early signs may be slower charging, reduced range, dashboard warnings, or even a “no start” condition. Regular safety checks and State of Health (SOH) diagnostics help detect and resolve these issues before they become expensive or dangerous, supporting both longevity and resale value. For more insights, see What Car? (2024) and HSE EV Safety Guidance.
How does the check prevent dangerous incidents or electrical fires?
Every step follows official HSE GS44 and NFCC EV Response protocols: circuits fully isolated, zero-voltage confirmed, lockout/tagout applied, insulation resistance tested, and thermal imaging scans run to detect heat anomalies invisible to the eye. All findings are documented, and any safety risks are flagged for urgent repair with clear guidance on next steps, reducing the risk of shock, short circuit, or fire.
Can this check increase my car’s resale value?
Yes—buyers and dealers increasingly demand certified battery health and safety documentation. A What Car? (2024) survey found verified battery reports can boost EV trade-in prices by up to 10%. Our certificates help you maximise resale value and buyer confidence by demonstrating verified electrical safety and battery performance.
Are your technicians formally recognised? What’s IMI TechSafe™ certification?
Absolutely. Every inspection is performed by an IMI TechSafe™ and HSE-qualified specialist, with full certification and calibration evidence available. IMI TechSafe™ is the UK’s officially recognised competency standard for electric vehicle safety and is required by many leasing, insurance, and manufacturer networks.
Will my car or battery be damaged during this service?
No. The process is completely non-invasive and compliant with UNECE Regulation No. 100 on EV safety. All checks follow manufacturer-approved procedures, including secure immobilisation, zero-voltage testing, and non-contact thermal imaging. The only result should be peace of mind and a detailed digital report—never any harm to your high-voltage system.
What do I need to bring for the appointment? How long does it take?
Just the vehicle and your key. Please ensure the high-voltage and 12V batteries are not completely discharged (we recommend at least 20% SOC). Most checks take around 45–60 minutes. For any further repairs or diagnostics, we’ll always provide a clear quote before proceeding.
Do you test charging equipment as well?
Yes—our inspection includes a test of the vehicle’s onboard charger and any supplied Type 2/Mode 3 charge equipment. We ensure safe operation and compliance with UNECE software and safety guidance (2023) and the IET Code of Practice for EV charging systems.
What happens if my EV or hybrid fails the safety check?
If your vehicle fails, you’ll receive a detailed digital report explaining each issue, its severity, and repair recommendations. Your insurer or finance provider will recognise this as compliance evidence, protecting you from hidden electrical risks. Please note: this report is advisory and does not replace any official DVSA MOT inspection.