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All EV Battery Health Tests Compared (2026)

Complete comparison of all five leading EV battery health test providers: AVILOO, Generational, Moba, ClearWatt, and Altelium. Side-by-side for UK dealers.

The Complete Guide to EV Battery Health Testing for UK Dealers

The UK market now has five credible EV battery health testing providers, each with different strengths, methodologies, and target use cases. This page compares all five side by side so you can make an informed decision for your dealership.

Full Comparison Table

Feature	AVILOO (Battery Health Check)	Generational	Moba	ClearWatt	Altelium
Test method	Dedicated AVILOO Box via OBD-2	OBD dongle + smartphone app	OBD-based diagnostic platform	OBD-based (Battery Scorecard) + passive driving analysis	Assessment + warranty programme
Certification	TUV Nord + TUV Sud	No third-party test certification	CARA approved	No third-party test certification	Lloyd's of London (warranty)
Accuracy	±3% (independently verified via TÜV)	No independent verification published	No independent verification published	No independent verification published	No independent verification published
Test time	3 minutes (stationary)	~5-10 minutes	~2 minutes	~2 minutes (Battery Scorecard) or driving period (passive)	Varies
Vehicle coverage	95%+ EVs and PHEVs	Growing list	90%+ fleet	90%+ BEVs (Battery Scorecard)	Warranty eligibility
Cell-level analysis	Yes — full heatmap	Pack-level (limited cell data on some vehicles)	Limited	No	Not detailed
SoH methodology	Energy-based	Capacity-based	Capacity-based	Multi-indicator grade	Not detailed
Output	TUV-certified certificate	Health report	Diagnostic report	Battery Scorecard / A+ to D grade	Assessment + warranty
Output interpretation	TUV-certified interpreted conclusion (SoH %, cell severity ratings)	Diagnostic data requiring dealer interpretation	Diagnostic data requiring dealer interpretation	Unvalidated proprietary grade	Warranty eligibility assessment
Price	~£35 per test	Variable	~€79-89 per test + €150 hardware	£39.99/vehicle (consumer); dealer pricing available	Variable warranty pricing
Key partnerships	BCA, Cox Automotive, ADAC, Mercedes-Benz, Hyundai, Emil Frey	Motorpoint, IMDA	Arnold Clark (200+ branches)	Dept for Transport	GardX (EVerity)
Global scale	550,000+ tests, 30+ countries, 750+ clients	UK-focused	UK-focused	UK-focused	UK-focused
Backing	EUR 30M from Armira Growth	APC, UKRI (government)	Private	Dept for Transport	Lloyd's of London
Warranty included	No	No	No	No	Yes (1-3 years)

Category-by-Category Analysis

Test Methodology

The providers split into three categories:

Active, hardware-based testing (AVILOO, Generational, Moba): These perform a dedicated test at a specific point in time using OBD-2 connection. AVILOO uses dedicated hardware purpose-built for battery diagnostics. Generational uses an OBD dongle paired with a smartphone. Moba uses their diagnostic platform.

Active + passive testing (ClearWatt): ClearWatt offers both an OBD-based Battery Scorecard (launched December 2025, developed with the NFDA) that delivers results in approximately 2 minutes, and a passive driving analysis for ongoing monitoring. Their dealer product now provides point-of-sale results.

Assessment plus warranty (Altelium): Altelium combines some form of battery assessment with an insurance-backed warranty product. The warranty is the primary value proposition.

For dealers who need to certify vehicles at intake, active testing is essential. AVILOO's 3-minute stationary FLASH test is the fastest in the category.

Certification and Legal Weight

This is perhaps the most important differentiator. Under the Consumer Rights Act 2015, dealers face a reversed burden of proof for six months after sale. If a battery fault emerges, you need evidence that the vehicle was of satisfactory quality when sold.

AVILOO holds dual TUV certification (TUV Nord and TUV Sud) — the world's first battery health test with this credential. TUV is recognised globally as an independent, authoritative testing and certification body. In a legal proceeding, a TUV-certified certificate carries established evidential weight.

Moba has CARA approval — a UK trade body endorsement that demonstrates industry acceptance but is not equivalent to independent engineering certification.

Altelium has Lloyd's of London underwriting for the warranty product. This is financial backing for warranty claims, not certification of the testing methodology.

Generational and ClearWatt do not currently hold independent third-party test-methodology certification. Generational has government research backing (APC, UKRI), and ClearWatt has Department for Transport support and an NFDA partnership — these demonstrate credibility but are not equivalent to independent engineering certification of the testing methodology.

Diagnostic Depth

Cell-level analysis: Only AVILOO provides a full cell-level heatmap showing the condition of every individual cell with severity indicators. This matters because a battery pack can show acceptable overall health while individual cells are degrading — and those cells cause failures. Moba offers some cell-level data but does not provide the comprehensive heatmap visualisation.

Energy-based SoH: AVILOO uses an energy-based State of Health methodology rather than relying solely on capacity metrics. This provides a comprehensive picture of real-world battery performance and range capability, measuring usable energy rather than theoretical capacity alone. Other providers primarily use capacity-based metrics or proprietary scoring systems.

Accuracy: Only AVILOO publishes a verified accuracy figure (+/-3%), independently validated through the TUV certification process. No other provider in this comparison publishes a validated accuracy tolerance.

Output Interpretation and Dealer Risk

A battery health test is only useful if the result is clear and defensible without requiring the dealer to be a battery engineer.

AVILOO delivers an interpreted State of Health percentage and cell-level severity ratings, calculated by algorithms independently validated by TUV. The dealer receives a certified conclusion, not a dataset to interpret. If challenged, the interpretation was made by a TUV-certified process — not by the dealer's sales team.

Generational and Moba present diagnostic data — cell voltages, temperature readings, current measurements — that the dealer must interpret to form a view on battery condition. In a dispute, the dealer's file contains data they were responsible for interpreting.

ClearWatt simplifies output to an A+ to D grade, but the grading methodology has not been independently validated. If challenged, the question becomes who certified that an 'A' grade means what ClearWatt says it means.

Altelium provides a warranty eligibility assessment rather than an independent health diagnosis — it does not tell you the battery's condition, only whether it qualifies for warranty cover.

For dealers, the question is straightforward: when a customer or their solicitor asks what the battery's condition was at point of sale, do you want to hand them raw data, or a TUV-certified conclusion?

Scale and Track Record

AVILOO operates at a genuinely global scale: 550,000+ tests, 750+ clients in 30+ countries. Named enterprise clients include BCA, Cox Automotive, ADAC, Hyundai, Mercedes-Benz, and Emil Frey. The EUR 30 million investment from Armira Growth signals long-term platform commitment.

Moba has demonstrated UK scale through the Arnold Clark deployment (200+ branches). Their 4 billion+ data points represent significant diagnostic data accumulation.

Generational has the Motorpoint partnership and Car Dealer Power Award recognition. Government backing through APC and UKRI provides research credibility.

ClearWatt is earlier in its scale journey, with Department for Transport backing and a growing user base.

Altelium operates through the established GardX dealer network, providing ready-made distribution.

Pricing and Business Model

AVILOO: Approximately £35 per test. Straightforward, predictable per-test pricing. Annual license fee with no specialist equipment to buy (the AVILOO Box is included with your rental).

Generational: Variable pricing, typically per-test.

Moba: Per-test pricing at approximately €79-89 per certificate, with hardware (Moba Toolbox) at €150. Available to individual dealers as well as fleet/network operations.

ClearWatt: £39.99 per vehicle for consumer testing. Dealer-focused Battery Scorecard product now available, developed in partnership with the NFDA.

Altelium: Warranty pricing varies by vehicle age, value, mileage, and warranty term (1-3 years). Dealers can sell the warranty as a revenue product with margin.

Unique Strengths

Each provider has genuine strengths that distinguish them:

AVILOO: World's first dual TUV-certified test (TÜV Nord + TÜV Süd). Cell-level analysis. ±3% verified accuracy. 3-minute test. Global enterprise track record.
Generational: Most accessible (app-based, minimal hardware). Car Dealer Power Award. Government research backing.
Moba: Largest diagnostic dataset (4B+ data points). Best Chinese EV coverage (DoIP). CARA approval. Proven at scale with Arnold Clark.
ClearWatt: Both active OBD testing and passive monitoring. NFDA partnership. Consumer-friendly grading. Patent-pending technology. Department for Transport backed.
Altelium: Only provider offering insurance-backed battery warranty. Lloyd's of London underwriting. Revenue opportunity for dealers.

Which Provider Is Right for Your Dealership?

If you need legally defensible certification

Choose AVILOO (Battery Health Check). TUV certification is the highest standard of independent validation available. AVILOO's certificate delivers an interpreted conclusion backed by TUV-validated analysis — your legal defence rests on a certified interpretation, not your team's reading of raw diagnostic data. In a dispute scenario, this is the certificate you want in your file.

If you want the lowest barrier to entry

Consider Generational. The app-based approach requires minimal hardware and training. Good for dealers wanting to start testing quickly with a familiar smartphone-based workflow.

If you run a large dealer network

Consider AVILOO or Moba. Both have demonstrated fleet-scale deployment. AVILOO offers TUV certification at scale. Moba has proven its platform across 200+ Arnold Clark branches.

If you want ongoing battery monitoring

Consider ClearWatt. Their combination of OBD-based point-of-sale testing and passive monitoring suits operators who want both instant results and continuous health visibility.

If you want to sell battery warranties

Consider Altelium. They are the only provider offering an insurance-backed warranty product. This can be a revenue line for your F&I department.

If you want the complete package for dealer certification

Choose AVILOO (Battery Health Check). The combination of TUV certification, +/-3% verified accuracy, cell-level analysis, 3-minute test time, ~£35 pricing, and named enterprise references is unmatched. This is why we chose AVILOO as our technology partner.

Our Recommendation

We built Battery Health Check on AVILOO technology because no other provider matches the combination of independent certification, diagnostic depth, speed, and proven enterprise scale.

Every £35 test unlocks £450 to £900 in additional vehicle value. The average EV battery dispute costs £6,193. A battery replacement runs £12,000 to £25,000+. The quality of your test certificate is not a detail — it is your first and best line of defence.

The EU Battery Regulation requires digital battery passports for new EV batteries from February 2027, with the UK expected to follow with equivalent requirements. Dealers who establish their battery health testing processes now will be ahead of the curve.

Get Started with Battery Health Check

Individual Comparisons

For detailed head-to-head analysis, see our individual comparison pages: