Generational vs ClearWatt: Battery Test Comparison

Generational vs ClearWatt

Two UK-focused EV battery testing providers, with different methodologies and different forms of trade-association backing. Generational reads the State of Health that the vehicle has already calculated; ClearWatt's Battery Scorecard combines OBD data with proprietary signals to produce an A+ to D grade.

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At a glance

	Generational	ClearWatt
Type of credential	"in line with the Car Remarketing Association Europe (CARA) guidelines"1	NFDA-aligned (EVA scheme)2
Other affiliations	APC, UKRI, IMDA, Department of Business & Trade3	NFDA, EVA scheme2
SoH calculation	Reports SoH "from the vehicle's Battery Management System (BMS)"1	OBD data + "further proprietary data"; positions itself as going "beyond" BMS-reported SoH4
Test method (dealer)	OBD dongle + smartphone app5	OBD-based Battery Scorecard within Flash Report framework6
Test time	~2 minutes1	~2 minutes (Battery Scorecard)4
Output	SoH %, range estimates, warranty tracking, cell-balance flags5	A+ to D grading + fault detection2
Cell-level	Cell-level voltage diagnostics (April 2026 launch)7	No cell-level heatmap described
Pricing	Variable, not publicly listed3	£39.99 consumer; dealer pricing on request8
Also offered	None	Passive consumer monitoring via Copilot app6
Geographic scope	UK	UK

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Two different methodologies, similar speed

Generational reads the SoH that the vehicle's Battery Management System has already calculated. From their own user guide: their test "reports the State-of-Health from the vehicle's Battery Management System (BMS), which yields the same value as using an official manufacturer diagnostic tool"¹.

ClearWatt's Battery Scorecard retrieves OBD data and "combines [it] with further proprietary data to generate a report"⁴. ClearWatt explicitly markets itself as going "beyond simple state of health (SoH) values taken from the vehicle's battery management system"⁴. The methodology behind the A+ to D grade is proprietary and has not been independently certified.

Both produce a result in approximately 2 minutes¹⁴.

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Trade-association alignment, not engineering certification

Both providers carry trade-association alignment rather than independent engineering certification of their test methodology.

• Generational: "in line with the Car Remarketing Association Europe (CARA) guidelines"¹; institutional partnerships with APC, UKRI, the Department of Business & Trade, the Automotive Council UK, IMDA³.
• ClearWatt: Battery Scorecard developed in partnership with the National Franchised Dealers Association (NFDA), aligning with the NFDA's EV Approved (EVA) scheme².

These are trade and policy bodies. Neither Generational nor ClearWatt appears on CARA Europe's approved providers list⁹. Neither holds TÜV certification.

For dealers, this is a difference of category: trade-association alignment supports adoption; independent engineering certification (TÜV) is a separate, methodology-level credential.

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Cell-level analysis

Generational announced cell-level voltage diagnostics in April 2026⁷. The capability measures voltage balance across individual cells with anomaly flags. As of 5 May 2026, we have not located a published description of the visual format used for Generational's cell-level output.

ClearWatt's Battery Scorecard publishes an A+ to D grade plus "fault detection beyond basic OEM values"⁶. Public materials do not describe a cell-level heatmap or per-cell severity ratings on the dealer report.

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What neither system provides

Neither Generational nor ClearWatt independently calculates SoH from raw cell-level data; neither ships a cell-level severity heatmap as a standard certificate feature; neither holds independent engineering certification of the test methodology; neither is on the CARA Europe approved providers list.

For dealers who want an independently calculated SoH with a cell-level severity heatmap, backed by TÜV certification of the testing methodology, with the AVILOO Flash Test also listed on CARA Europe's approved providers list, those features are available from AVILOO — the system Battery Health Check uses⁹.

See how Battery Health Check compares

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Sources

This page reflects publicly available materials reviewed and captured on 5 May 2026.

1. A guide to EV battery health checks — Generational's own user guide.
2. ClearWatt launches Battery Scorecard to support used EV sales — GreenFleet, 5 December 2025.
3. Generational homepage — institutional partners.
4. ClearWatt launches new Battery Scorecard for used EV assessment — AM Online, December 2025.
5. EV Battery Testing Solutions — Generational's product page.
6. ClearWatt approach — ClearWatt's product overview.
7. Generational launches cell-level EV battery voltage testing — Engineer Live, April 2026.
8. ClearWatt EV Health Test — ClearWatt's consumer test page.
9. CARA Europe approved providers list — neither Generational nor ClearWatt on the list.

See also: AVILOO vs Generational | AVILOO vs ClearWatt | All Providers Compared