Aviloo Costs and Professional Battery Diagnostics Compared

Pricing for the analysis of high-voltage batteries in electric vehicles has diversified significantly in recent years. Entry-level solutions that merely read out the fault memory via the OBD2 interface are already available for a low two-digit amount. However, these often provide only a snapshot without an in-depth analysis of cell balance or actual remaining capacity in kilowatt-hours (kWh).

Established providers such as Aviloo offer different levels of diagnostics. The so-called flash test, which is carried out within a few minutes while the vehicle is stationary, is in the lower price segment. It provides an initial indication but is often not sufficient for a binding value determination. Aviloo's more extensive premium test, which requires a discharge drive from 100 percent down to below 10 percent state of charge, involves a higher level of analytical effort. Here, the vehicle owner must manage the test process themselves and carry out the drive, which represents a considerable time commitment.

In contrast, DIAVAG pursues a holistic approach as an appraisal service. Customers receive not only a Premium Battery Test but a complete vehicle inspection by a qualified appraiser on site. This includes checking the body, chassis, and electronic systems. The result is a BVSK-compliant report signed by a senior inspector, giving it significantly greater evidentiary weight than a pure battery certificate.

When appraising an electric vehicle, the battery is the heart of the valuation. DIAVAG integrates the Premium Battery Test as standard into every EV report. This test goes far beyond simply reading out onboard computer values. Our appraisers use calibrated hardware to precisely determine the state of health (SoH).

The scope of the examination includes measuring cell voltages and cell balance. Discrepancies between individual battery cells can indicate emerging defects or excessive wear, even if overall capacity is still within an acceptable range. In addition, the charging curve and the internal resistance of the battery are analyzed. This data is essential for making a well-founded statement about the remaining lifespan and performance of the storage unit.

A major advantage of the DIAVAG method is its independence. Since DIAVAG neither buys vehicles nor performs repairs nor brokers insurance, the report remains objective. This is especially important for warranty questions with the manufacturer or when processing insurance claims. The report documents the remaining capacity in kWh and puts it in relation to the as-new condition of the respective vehicle model.

A critical factor in many battery tests is the logistical effort involved. While some providers require the vehicle to remain in a workshop for hours or days, or require the owner to carry out complex test cycles themselves, DIAVAG relies on maximum efficiency. The appraiser comes directly to the asset's location, whether that's a private garage, a dealer's yard, or a company parking lot.

The entire on-site inspection workflow usually takes under 15 minutes. Through the use of standardized processes and specialized hardware kits, which include OBD2 scanners, coating-thickness gauges, and digital multimeters, complete documentation is possible in the shortest time. The appointment can be arranged within 24 hours of commissioning.

The finished PDF report is delivered the same day. This speed is a decisive competitive advantage in the used car market, where transactions often need to be processed quickly. For commercial customers such as dealers or fleet operators, DIAVAG also offers an API connection to existing dealer management systems (DMS) to further automate the process from a volume of 50 reports per month.

A pure battery test without being embedded in an official report often reaches its limits in legal disputes. DIAVAG reports meet the strict requirements of the Federal Association of Freelance and Independent Motor Vehicle Experts (BVSK). In addition, DIAVAG operates as an inspection body under ISO/IEC 17020 Type A, representing the highest level of independence in the inspection industry.

These qualifications are essential when the report is to be used for purposes such as inheritance matters, divorce proceedings, or court disputes. In such cases, the document serves as court-admissible evidence of the vehicle's actual market value, taking battery condition into account. For specific legal questions, clients should always consult a specialized lawyer or notary, for whom the DIAVAG report serves as a well-founded data basis.

Optionally, DIAVAG offers the option of securing the report using a notarial hash on the Polygon blockchain. This guarantees the document's tamper resistance and provides unequivocal evidence of the vehicle's condition at the time of inspection, with every finding directly linked to the recorded raw data through source traceability. This technological safeguard is a unique feature that goes beyond the services of conventional inspection organizations.

To better classify the costs of Aviloo and DIAVAG, a direct comparison of the scope of services helps. A pure battery test focuses exclusively on the chemical condition of the battery. A DIAVAG valuation report, on the other hand, looks at the vehicle as a whole system.

For private buyers or sellers, the all-in-one package offers a significantly better price-to-value ratio, since it covers all value-relevant factors. In particular, checking for accident damage using coating-thickness measurement is just as important for used EVs as battery condition.

From February 2027, the EU Battery Passport will become mandatory for all new batteries in electric vehicles and stationary storage systems. This regulation aims to increase transparency across the entire supply chain and lifecycle of a battery. DIAVAG is already prepared for these regulatory requirements today.

Our diagnostic procedures already capture many of the data points that will be required in the future battery passport. These include information on capacity, performance, and general wear condition. By adopting these standards early, DIAVAG offers its customers a future-proof valuation basis. This is relevant not only for cars, but also for other asset classes such as home storage systems, which will also fall under the new EU regulations.

Documentation is carried out in a GDPR-compliant manner, with data storage within the European Union. This ensures that sensitive vehicle and owner data is processed to the highest security standards. For companies managing large fleets, this compliance means significant relief in meeting their own compliance guidelines.

While many providers focus on the car market, DIAVAG covers a total of seven asset classes. In addition to EVs, these include boats, construction and agricultural machinery, cargo bikes, e-scooters, and home storage systems. In all these areas, the battery plays a central role in residual value.

Especially for home storage systems used with photovoltaic installations, there is often uncertainty about the actual condition after years of operation. In real estate transactions, a DIAVAG report can provide clarity and objectively document the value of the installed technology. For boats too, which are increasingly being electrified, a mobile diagnostic at the mooring in the harbor is a major service advantage.

Standardized hardware and a uniform inspection workflow enable DIAVAG to deliver the same high quality and legal certainty across all these categories. This clearly sets the service apart from classic inspection organizations such as TÜV or DEKRA, which generally do not offer specialized battery diagnostics for niche assets such as boats or home storage systems.

The decision for a battery diagnostic should not be based solely on the purchase cost. A cheap test that has no legal relevance or requires a lot of personal effort can end up being more expensive than a professional report. DIAVAG offers a turnkey solution that combines mobility, technical depth, and legal certainty.

For private users, this means security when buying or selling and a strong position with insurers. For commercial players, the system offers scalability and a reliable data basis for inventory management. DIAVAG's independence always guarantees a neutral judgment, free from self-interest in vehicle trading or repair services.

Interested appraisers also have the opportunity to use the proven system themselves. DIAVAG offers the hardware kit including the necessary software to become a partner in the nationwide network and create standardized reports at the highest level.