Why EV battery health checks could become part of the MOT

A major cross-sector industry group is calling for electric vehicle (EV) battery health checks to become a mandatory part of the UK MOT – a move that could significantly reshape testing procedures for garages across the country.

The 4R Battery Alliance, which represents stakeholders across the battery lifecycle, has urged the government to introduce standardised EV battery assessments into the MOT framework as EV adoption continues to accelerate.

Why the industry wants battery testing added

At present, the MOT includes some EV-specific safety checks – such as inspections of high-voltage cables and visible battery mountings – but it does not assess battery health itself.

The Alliance argues that this is a critical gap.

Battery condition plays a central role in:

• Vehicle safety
• Performance and range
• Residual values
• Consumer confidence

Faulty or degraded batteries can pose serious risks, including thermal events and unexpected failures, making early detection increasingly important.

Supporting the used EV market

One of the biggest drivers behind the proposal is the growing used EV sector.

According to industry research, uncertainty around battery health is the number one barrier to buying a used electric vehicle.

For MOT testers and dealers alike, a standardised battery health check could:

• Provide a trusted, independent measure of battery condition
• Improve transparency in vehicle sales
• Stabilise residual values
• Increase buyer confidence

The Alliance says this would help unlock a stronger, more reliable used EV market – something that is essential as more EVs enter second and third ownership cycles.

A push towards standardisation

A key issue highlighted by the industry is the lack of consistency in battery diagnostics.

Different manufacturers use different systems and metrics, which can lead to confusion and resistance across the sector. The Alliance is therefore calling for:

• Clear national standards for battery testing
• Agreed methodologies
• Defined use cases within the MOT

Without this, widespread adoption could be difficult.

Implications for MOT garages

If adopted, mandatory EV battery assessments would have significant implications for MOT stations, including:

1. New equipment and training

Garages may need to invest in:

• Battery diagnostic tools
• Software integration
• Technician upskilling

2. Additional test time

Battery health checks could extend MOT duration, depending on how assessments are implemented.

3. New revenue opportunities

On the flip side, battery diagnostics could open up:

• Chargeable add-on services
• Pre-sale inspections
• Ongoing EV health checks

4. Greater role in EV lifecycle management

Testing stations could become key players in identifying batteries suitable for:

• Repair
• Reuse
• Repurposing (e.g. energy storage)
• Recycling

Safety and sustainability benefits

The proposal is also being positioned as a step toward a circular EV economy, aligned with the “4Rs”:

• Repair
• Reuse
• Repurpose
• Recycle

Better visibility of battery condition would help determine when batteries can be reused or require recycling, improving sustainability across the sector.

Additionally, earlier detection of faults could reduce the risk of battery-related incidents and improve overall road safety.

What happens next?

While there is currently no confirmed timeline for introducing battery testing into the MOT, industry support is growing.

• Around 90% of dealers back an industry-wide battery health scheme
• Previous MOT consultations have already explored EV-specific changes
• EV parc growth is accelerating, increasing pressure for reform

For MOT testers, this is a development worth watching closely.

Final thoughts

The call for mandatory EV battery assessments reflects a broader shift in the role of the MOT as the UK transitions to electric mobility.

If implemented, it would mark one of the most significant changes to the test in decades – moving beyond traditional mechanical checks into high-voltage diagnostics and battery analytics.

For forward-thinking garages, the message is clear:
EV capability is no longer optional – and battery testing could be the next major step.