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All EV Battery Health Tests Compared (2026)

AVILOO, Generational, Moba, ClearWatt, Altelium — five UK-active battery health providers compared on certification, methodology, scale and output. Sourced.

The complete guide to EV battery health testing for UK dealers

Five providers serve the UK used-EV battery health market. They take different technical approaches, hold different kinds of credential, and operate at different scale. This page summarises each, with sources captured 5 May 2026.

The single most useful question to start with is how does each provider arrive at the State of Health figure on its certificate? Some independently calculate SoH from raw data; some report what the vehicle's own Battery Management System has already calculated; one is a warranty insurance product rather than a stand-alone test.

Full comparison table

AVILOO Generational Moba ClearWatt Altelium
Type of credential TÜV-certified methodology1; on CARA Europe approved providers list2 "in line with the Car Remarketing Association Europe (CARA) guidelines"3 CARA Approved (first to be approved on the market)4 NFDA-aligned (EVA scheme)5 Lloyd's of London market underwriting on warranty6
SoH calculation Independently calculated from raw cell-level data7 Reads SoH from the vehicle's BMS3 "The SOH provided by the Moba certificate is the same as the manufacturer's SOH"4 OBD data + proprietary data; positions as going "beyond" BMS-reported SoH8 Proprietary data modelling for warranty eligibility9
SoH methodology Energy-based, GTR22-aligned, WLTP-aligned10 Capacity-based (BMS value)3 OEM SoH from the BMS4 A+ to D grading on dealer Battery Scorecard5 Warranty eligibility model
Test method AVILOO Box, OBD-211 OBD dongle + smartphone app12 OBDII (Moba Connect Pro device + app)4 OBD-based Battery Scorecard + passive Copilot monitoring13 Assessment as part of warranty programme
Test time 3 minutes — independent analysis11 ~2 minutes3 ~2 minutes4 ~2 minutes (Battery Scorecard)8 Not stated
Vehicle coverage 95%+ EVs and PHEVs11 40+ marques listed14 90%+ of installed base; strong Chinese-brand DoIP4 UK-focused Tied to warranty eligibility
Cell-level heatmap Yes — since June 20257 Cell-level voltage diagnostics (April 2026)15 Limited cell-level data; no heatmap No cell-level heatmap described Not applicable
Output Independently calculated SoH %, cell-level severity heatmap, benchmarking, range estimates7 SoH %, range estimates, warranty tracking, cell-balance flags12 Digital certificate with SoH and adjusted autonomies4 A+ to D grading + fault detection5 Warranty eligibility + extended warranty (1–3 year terms)6
Pricing (UK dealer) £35 per test Variable, not publicly listed16 Per-test pricing Dealer pricing on request17 Variable warranty pricing
Major partnerships / customers Mercedes-Benz, Hyundai, BCA, Cox Automotive, ADAC, Emil Frey, Pickles Australia, Arval18 Motorpoint (21 stores + 2 prep centres)19 Arnold Clark (200+ branches)20 NFDA member dealers via EVA5 GardX EVerity (launched 9 Nov 2024)9
Geographic scope Europe, Asia, Australia, USA18 UK UK + EU UK UK
Reported scale 550,000+ cumulative tests; over 750 clients across more than 30 countries (Feb 2026)21 1,500+ vehicles tested in Motorpoint trial (Jan 2026)19 UK + EU footprint4 UK-focused13 UK distribution via GardX
Backing / financial €30M from Armira Growth (Feb 2026)21 APC, UKRI, Department of Business & Trade16 Private NFDA partnership5 Lloyd's of London market6
Warranty included No No No No Yes (1–3 year extended warranty)6

Three categories of approach

The five providers split into three approaches to producing a State of Health figure on the certificate.

Independent calculation from raw data. AVILOO measures cell-level voltages, currents and temperatures directly, then runs algorithms over the resulting dataset to compute its own SoH figure. This is the only methodology of the five that has been TÜV-certified1 as an independent diagnostic methodology.

Reading the manufacturer's BMS-reported SoH. Generational and Moba both arrive at SoH by reading the value the vehicle's own Battery Management System has already calculated. Generational's user guide states this directly3. Moba's CARA Approval is specifically that "the SOH provided by the Moba certificate is the same as the manufacturer's SOH"4. Both approaches are honest about what they do.

Proprietary grading or warranty assessment. ClearWatt's Battery Scorecard combines OBD data with proprietary signals to produce an A+ to D grade5. Altelium's assessment is in service of warranty eligibility, not stand-alone diagnostic certification6.

Three categories of credential

Independent engineering certification, trade-association recognition, and financial-sector underwriting are different categories of credential. The differences matter because under the Consumer Rights Act 2015's reversed burden of proof in the first six months after sale, the dealer's evidence file at point of sale becomes practically important.

Engineering certification (TÜV). AVILOO holds TÜV certification of its testing methodology1, with TÜV SÜD as a partner since April 202222 and TÜV NORD also a partner23. TÜV is an independent engineering certification body whose credential attaches to the testing methodology itself.

Remarketing-industry approval (CARA Europe). AVILOO (AVILOO Flash Test) and Moba (Moba Certify Pro) both appear on CARA Europe's approved providers list2. CARA Europe approves diagnostics solutions against its remarketing-industry guidelines. Generational, ClearWatt, and Altelium do not appear on the CARA approved list.

Trade-association alignment. Generational describes its methodology as "in line with the Car Remarketing Association Europe (CARA) guidelines"3 and lists APC, UKRI, IMDA and the Department of Business & Trade as institutional partners16. ClearWatt's Battery Scorecard is NFDA-developed under the EVA scheme5. These are research-funding, policy and trade-association bodies — not engineering certifiers.

Financial-sector underwriting (Lloyd's). Altelium's warranty product is underwritten by 'A'-rated insurers through the Lloyd's of London market6. This stands behind the warranty payout, not the diagnostic methodology.

Cell-level analysis

AVILOO has shipped a cell-level severity heatmap on every certificate since June 20257 — visualising the condition of every cell with severity indicators, designed for non-specialists.

Generational announced cell-level voltage testing in April 202615, ten months after AVILOO. As of 5 May 2026, we have not located a published description of the visual format used for Generational's cell-level output.

Moba offers limited cell-level data; no heatmap described4. ClearWatt does not describe a cell-level heatmap on the dealer Battery Scorecard. Altelium is a warranty product — cell-level diagnostics is not a feature of the warranty programme.

Which provider is right for which dealer?

If you need the strongest evidence file at point of sale

AVILOO (Battery Health Check). TÜV certification of the testing methodology, the AVILOO Flash Test on CARA Europe's approved providers list, independent SoH calculation from raw data, and a cell-level severity heatmap on every certificate. The combination directly addresses the "what evidence backs the SoH figure?" question that arises when a buyer raises a battery-condition concern under the Consumer Rights Act.

If you sell large volumes of Chinese-brand EVs

Moba carries the strongest published claim on DoIP / Chinese-brand vehicle compatibility4, demonstrated at scale with Arnold Clark's 200+ branches20. AVILOO covers 95%+ of EVs and PHEVs11, but Moba's Chinese-brand depth is a published differentiator.

If you want to run a passive consumer monitoring app

ClearWatt's Copilot is the only product in this list that runs hardware-free in the background13. Useful for ongoing post-sale monitoring; less directly relevant to point-of-sale certification.

If you want to sell battery warranties as a revenue product

Altelium's GardX EVerity is the only product in this list that is a warranty rather than a test9. The warranty can be a margin product alongside an independent diagnostic certificate — they sit comfortably together.

If you want the lowest-friction app-based dealer workflow

Generational offers a smartphone-app workflow with an OBD dongle and minimal training requirement12. The trade-off: SoH is read from the vehicle BMS rather than independently calculated, and the testing methodology has not been independently engineering-certified.

Our recommendation

Battery Health Check is built on AVILOO. We chose AVILOO because it produces the strongest evidence file at the point of sale: independently calculated SoH, TÜV-certified methodology, a place on CARA Europe's approved providers list, cell-level severity heatmap, drawn from a global dataset of more than 550,000 cumulative tests across more than 30 countries.

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 the test certificate is not a detail — it is the dealer's 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. Dealers establishing battery health testing processes now will be ahead.

Get started with Battery Health Check

Individual head-to-head pages

For detailed pairwise analysis:

Sources

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

  1. AVILOO official flyer (PDF) — primary AVILOO marketing.
  2. CARA Europe approved providers list — including AVILOO Flash Test and Moba Certify Pro.
  3. A guide to EV battery health checks — Generational's own user guide.
  4. Moba Certify Pro product page — Moba's own product specification.
  5. ClearWatt launches Battery Scorecard to support used EV sales — GreenFleet, 5 December 2025.
  6. Used EV battery health test and warranty service launches — Fleet World.
  7. AVILOO launches next-gen battery certificate — electrive.com, 12 June 2025.
  8. ClearWatt launches new Battery Scorecard for used EV assessment — AM Online, December 2025.
  9. GardX unveils EVerity — partnership launch announcement, 9 November 2024.
  10. AVILOO Whitepaper: Health State of the Battery (SoH) — AVILOO whitepaper on energy-based SoH.
  11. AVILOO FLASH Test product page — AVILOO's own product specification.
  12. Generational EV Battery Testing Solutions — Generational's product page.
  13. ClearWatt approach — ClearWatt's product overview.
  14. Generational supported models — Generational's supported-vehicles list.
  15. Generational launches cell-level EV battery voltage testing — Engineer Live, April 2026.
  16. Generational homepage — institutional partners and customers.
  17. ClearWatt EV Health Test — ClearWatt's consumer test page.
  18. AVILOO secures €30 million strategic investment — Batteries News, February 2026.
  19. Motorpoint rolls out car battery health certification across 21-store network — Motor Trader, 19 January 2026.
  20. Arnold Clark partners with battery diagnostics company Moba — Motor Trader, 12 March 2026.
  21. Battery diagnostics specialist Aviloo secures €30 million — electrive.com, 11 February 2026.
  22. AVILOO: Battery test for professionals — TÜV SÜD's own newsletter, April 2022.
  23. AVILOO homepage — partner logo grid.

See also: How It Works | The Certificate | Why It Matters | For Dealers

Battery Health Check is an independent provider of EV battery diagnostic services using AVILOO technology. This comparison has been prepared by Battery Health Check and is not an official AVILOO corporate publication.

We endeavour to provide accurate and up-to-date information, but details may change. If you spot an error, please let us know.