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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	Passive testing during driving	Assessment + warranty programme
Certification	TUV Nord + TUV Sud	None	CARA approved	None	Lloyd's of London (warranty)
Accuracy	+/-3% (verified)	Not verified	Not stated	Not verified	Not stated
Test time	3 minutes (stationary)	~5-10 minutes	Varies	Requires driving period	Varies
Vehicle coverage	95%+ EVs and PHEVs	Growing list	90%+ fleet	Growing	Warranty eligibility
Cell-level analysis	Yes — full heatmap	No	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	A+ to D grade	Assessment + warranty
Price	~£35 per test	Variable	Enterprise	Consumer app	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.

Passive testing (ClearWatt): Rather than a dedicated test, ClearWatt analyses battery health during normal driving. This suits ongoing monitoring but does not deliver instant results for the dealer workflow.

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 only battery health test worldwide 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 testing certification. Generational has government research backing (APC, UKRI), and ClearWatt has Department for Transport support, but these are not testing certifications.

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 more accurate picture of real-world battery performance and range capability. 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.

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 upfront hardware cost (the AVILOO Box remains AVILOO property).

Generational: Variable pricing, typically per-test.

Moba: Enterprise pricing model, typically negotiated at fleet/network level.

ClearWatt: Consumer app pricing model, with dealer offerings developing.

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: Only TUV-certified test worldwide. 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: Only passive testing provider. Ongoing monitoring capability. Consumer-friendly grading. Patent-pending technology.
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. 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 passive testing approach suits fleet operators who want continuous health visibility rather than point-in-time snapshots.

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 Passport regulation arrives in February 2027. Dealers who establish their battery health testing processes now will be ahead of the curve when certification becomes mandatory.

Get Started with Battery Health Check

Individual Comparisons

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