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Generational vs ClearWatt: Battery Test Comparison

Compare Generational and ClearWatt EV battery health tests. OBD dongle app-based testing vs OBD-based Battery Scorecard and passive analysis for UK dealers.

Generational vs ClearWatt — How Do They Compare?

Generational and ClearWatt both offer EV battery health assessment, but their approaches differ. Generational uses an OBD dongle to perform active tests at a specific point in time. ClearWatt now offers both an OBD-based Battery Scorecard (developed with the NFDA) for point-in-time testing and their original passive analysis during normal driving.

Here is how they compare for dealers evaluating battery health testing options.

Side-by-Side Comparison

Feature	Generational	ClearWatt
Test method	OBD dongle + smartphone app	OBD-based Battery Scorecard + passive monitoring
Certification	No third-party test certification	No third-party test certification
Accuracy	Not independently verified	Not independently verified
Test time	Approximately 5-10 minutes	Approximately 2 minutes (Battery Scorecard)
Vehicle coverage	Growing coverage list	90%+ BEVs
Cell-level analysis	Pack-level (limited cell data on some vehicles)	No — A+ to D grading system
Price point	Variable pricing	£39.99/vehicle (consumer); dealer pricing available
Key partnerships	Motorpoint, IMDA	NFDA, Department for Transport
Output type	Diagnostic data requiring dealer interpretation	Unvalidated proprietary A+ to D grade
Unique advantage	Car Dealer Power Award, government-backed	Battery Scorecard (NFDA-developed), patent-pending ClearWatt Engine

What Each Provider Does Well

Generational's Strengths

Generational's Car Dealer Power Award reflects real dealer satisfaction. The government backing through APC and UKRI provides research credibility. Their approach — an OBD dongle paired with a smartphone app — delivers results at a specific point in time, which fits the dealer workflow of assessing vehicles at intake.

The Motorpoint partnership demonstrates large-account capability, and the app-based model keeps the barrier to entry low.

ClearWatt's Strengths

ClearWatt has expanded significantly since launching their OBD-based Battery Scorecard in December 2025, developed in partnership with the NFDA. This gives them a point-in-time dealer testing product alongside their original passive monitoring. The Battery Scorecard takes approximately 2 minutes and covers 90%+ of BEVs, making it directly competitive for dealer workflows.

Partnerships with both the NFDA and Department for Transport demonstrate strong institutional backing. Their patent-pending ClearWatt Engine still powers the passive monitoring side, analysing 50+ indicators during normal driving with the consumer-friendly A+ to D grading system.

Key Differences

Test approach: Both now offer OBD-based point-in-time testing. Generational provides results in approximately 5-10 minutes. ClearWatt's Battery Scorecard delivers results in approximately 2 minutes. ClearWatt also retains its passive monitoring capability for ongoing health tracking, giving it a dual-mode advantage.

Dealer market presence: Generational is established in the dealer channel with the Motorpoint partnership and Car Dealer Power Award recognition. ClearWatt has moved aggressively into the dealer market through the NFDA partnership, which gives it direct access to the UK's dealer trade body membership. Both now serve the dealer market directly.

Output format: Generational produces a health report at a specific point in time. ClearWatt produces both a Battery Scorecard report (from OBD testing) and the A+ to D grade (from passive monitoring). For point-of-sale certification, both OBD-based outputs serve a similar purpose. Neither output, however, carries an independently certified interpretation of what the data means — the dealer remains responsible for concluding whether the battery is fit for sale.

What Neither Provider Offers

Both Generational and ClearWatt share some limitations when compared to the broader market:

No TUV certification — Neither methodology has been independently certified by TUV
No verified accuracy figure — Neither publishes a validated accuracy tolerance
No cell-level analysis — Neither shows individual cell condition with heatmaps (Generational provides limited cell data on some vehicles)
No energy-based SoH calculation — Both use alternative metrics
No independently interpreted output — Generational presents diagnostic data requiring dealer interpretation. ClearWatt's A+ to D grade simplifies the output, but the grading methodology has not been independently validated

For dealers who need independently certified, cell-level battery health evidence, Battery Health Check powered by AVILOO offers the world's first dual TUV-certified test with +/-3% verified accuracy and full cell-level heatmap analysis in just 3 minutes.

The Bottom Line

Both Generational and ClearWatt now offer OBD-based dealer testing, with ClearWatt's Battery Scorecard (developed with the NFDA) adding a competitive ~2-minute test to complement their passive monitoring. Generational retains strong dealer recognition through the Car Dealer Power Award.

Neither, however, provides the independent TUV certification, verified accuracy, or cell-level diagnostic depth that UK dealers increasingly need for Consumer Rights Act compliance and buyer confidence.

See How Battery Health Check Compares