Compare Providers

ClearWatt vs Altelium: Battery Test Comparison

Compare ClearWatt and Altelium EV battery solutions. Passive health testing vs Lloyd's-underwritten battery warranty for UK car dealers.

ClearWatt vs Altelium — How Do They Compare?

ClearWatt and Altelium take very different approaches to the EV battery confidence challenge. ClearWatt provides passive battery health testing during normal driving. Altelium combines health assessment with an insurance-backed battery warranty through the GardX EVerity programme.

Here is how they compare for dealers evaluating battery confidence solutions.

Side-by-Side Comparison

Feature	ClearWatt	Altelium
Test method	Passive testing during normal driving	Assessment + warranty programme
Certification	No independent certification	Lloyd's of London underwritten warranty
Accuracy	Not independently verified	Not publicly stated
Test time	Requires driving period	Varies by programme
Vehicle coverage	Growing coverage	Coverage tied to warranty eligibility
Cell-level analysis	No — A+ to D grading system	Not publicly detailed
Price point	Consumer app model	Warranty pricing varies (1-3 year options)
Key partnerships	Department for Transport backed	GardX (EVerity programme)
Unique advantage	Patent-pending ClearWatt Engine, 50+ indicators	Battery warranty as add-on product

What Each Provider Does Well

ClearWatt's Strengths

ClearWatt has built a genuinely innovative product with passive battery health testing. Their patent-pending ClearWatt Engine analyses 50+ indicators during normal driving, building a health profile without requiring a dedicated test session. The A+ to D grading system is intuitive for consumers.

Department for Transport backing signals government confidence in the approach. For consumers and fleet operators wanting ongoing battery health monitoring, ClearWatt offers something no other provider does.

Altelium's Strengths

Altelium is unique in offering an insurance-backed battery warranty. The GardX EVerity programme makes this accessible through the dealer channel, with Lloyd's of London underwriting providing genuine financial security behind warranty claims.

Warranty options of 1 to 3 years give flexibility. The warranty is a sellable product — dealers can generate revenue from it, not just incur testing costs. For buyers hesitant about EV battery longevity, a warranty can close the sale.

Key Differences

Monitoring vs insurance: ClearWatt monitors and reports on current battery health. Altelium insures against future battery failure. These address different anxieties — "is this battery healthy?" vs "what if this battery fails?"

Dealer fit: ClearWatt's passive approach requires a driving period, which does not align naturally with the dealer workflow of certifying vehicles at intake. Altelium's warranty programme integrates into the F&I (finance and insurance) process that dealers already run. From a dealer operations perspective, Altelium fits more naturally.

Consumer vs trade: ClearWatt started as a consumer product. Altelium, through GardX, is built for the dealer channel. This affects everything from pricing models to integration with dealer management systems.

Revenue opportunity: Altelium is a revenue product — dealers sell the warranty and earn margin. ClearWatt is a cost or a consumer-facing tool. For the dealer business case, Altelium has a more straightforward ROI story.

What Neither Provider Offers

Both ClearWatt and Altelium have significant limitations for dealers who need certified point-of-sale evidence:

No TUV certification — Neither testing methodology is independently TUV-certified
No verified accuracy — Neither publishes validated accuracy data
No cell-level analysis — Neither provides individual cell condition heatmaps
No instant, stationary testing — Neither offers a 3-minute workshop test
No energy-based SoH — Neither uses energy-based State of Health methodology

For dealers who need independently certified evidence of battery condition at point of sale, Battery Health Check powered by AVILOO delivers TUV-certified testing with +/-3% accuracy, cell-level heatmap analysis, and results in 3 minutes at approximately £35 per test.

The Bottom Line

ClearWatt and Altelium serve different needs and different audiences. ClearWatt is strongest as a consumer-facing monitoring tool. Altelium is strongest as a dealer-channel warranty product.

Neither, however, provides the certified point-of-sale evidence that UK dealers need for Consumer Rights Act compliance. For that requirement, the TUV-certified testing available through Battery Health Check is the market standard.

See How Battery Health Check Compares