On-Site Car Valuation Reports: Legally Sound Assessment at a Fixed Price

In classic vehicle valuation, it was common practice for decades that the vehicle owner had to visit an inspection center or workshop. This process is time-consuming and often involves logistical hurdles, especially when the vehicle is not registered or is located at a distant site as part of an inheritance. An on-site car valuation report solves this problem through maximum flexibility. The appraiser comes directly to the asset, whether that's a private garage, a dealer's lot or a port location.

The mobile inspection enables an assessment under real-world conditions. This captures not only the visual condition but, through the use of mobile diagnostic technology, achieves a depth of analysis that was previously reserved for stationary facilities. For the customer, this means saving several hours. In the region (Hamburg, Berlin, Munich), DIAVAG guarantees an appointment within 24 hours. This speed is a decisive factor, especially for time-critical transactions or insurance cases. The appraiser's independence is maintained throughout, as DIAVAG neither purchases vehicles nor carries out repairs.

A qualified valuation report is not based on estimates but on valid data. The DIAVAG appraiser uses a standardized inspection workflow supported by calibrated hardware. An OBD2 scanner is used, which looks deep into the onboard electronics and reads out fault memory codes as well as real-time parameters. This is essential for identifying hidden defects in the engine electronics or safety systems that would remain concealed in a purely visual inspection.

In addition, a coating thickness gauge is used to check the paint thickness at various points on the body. This reveals repainting and repaired accident damage that can massively affect market value. Tread depth gauges and digital multimeters round out the set, used to objectively assess the condition of wear parts and the electrical system. All documentation is done digitally and supplemented by a tamper-proof photo set. This technology-supported approach ensures that every appraisal report meets the high requirements of the BVSK (German Federal Association of Freelance and Independent Motor Vehicle Appraisers) and achieves ISO/IEC 17020 Type A inspection quality.

A significant obstacle in commissioning appraisers in the past was the unclear pricing structure. Many offices bill by the hour or as a percentage of the vehicle value, which makes costs difficult for the end customer to calculate. DIAVAG breaks with this tradition and relies on a strict fixed-price model. The standard valuation report for cars, boats, cargo bikes or e-scooters is offered at a transparent fixed price. This price includes travel within the region, the on-site inspection and the creation of the digital appraisal report.

For more complex assets such as electric cars or home energy storage systems, a transparent fixed-price structure applies. This surcharge is justified by the significantly higher inspection effort and the use of specialized diagnostic software for the Premium Battery Test. For commercial customers, such as car dealerships or fleet operators, who require a volume of more than 50 appraisal reports per month, individual terms are agreed. This price stability creates trust and planning security, both for private individuals and for legal actors such as lawyers or notaries who commission appraisal reports for their clients.

When it comes to valuing electric vehicles, conventional car appraisal reaches its limits. The drive battery often represents up to 50 percent of the vehicle's total value. An on-site car valuation report for an EV without detailed battery diagnostics is therefore incomplete. DIAVAG integrates the Premium Battery Test as standard into the premium appraisal. This determines the State-of-Health (SoH), cell balance and the actual kWh capacity.

While organizations such as TÜV or DEKRA often only offer basic diagnostics, DIAVAG delivers an in-depth analysis of the charging curve and internal resistance. This is particularly important with regard to the upcoming EU Battery Passport, which becomes mandatory from February 2027. A buyer of a used EV gains certainty about the remaining performance of the battery through this appraisal. For the seller, it serves as a value-enhancing argument, since a certified good battery condition stabilizes the market value. The measurement is carried out non-destructively and without disassembly, directly via the vehicle's diagnostic interface.

Valuation reports are frequently needed in contexts where legal interests collide. Typical occasions are inheritance disputes, divorce proceedings or the clarification of replacement values after an insurance case. In these situations, the appraiser's formal qualification is decisive. DIAVAG appraisers work according to BVSK standards and the reports are signed by a senior inspector. This ensures high acceptance among insurers and in court proceedings, while always maintaining reference to the JVEG (Judicial Remuneration and Compensation Act).

A special feature of DIAVAG appraisal reports is the optional anchoring of a notarial hash on the Polygon blockchain. This makes the document absolutely tamper-proof and verifiable. DIAVAG acts as an independent authority and does not provide legal advice. For specific legal questions, a lawyer or notary should always be consulted. The appraisal report provides the necessary factual basis with complete source traceability, on which legal decisions can be made. The ISO/IEC 17020 Type A certification capability further underscores the highest level of independence, since there are no economic ties whatsoever to vehicle dealers or workshops.

A unique selling point of DIAVAG is coverage of a total of seven asset classes. While classic inspection organizations focus almost exclusively on the car sector, DIAVAG also assesses boats, construction and agricultural machinery, cargo bikes, e-scooters and even stationary home energy storage systems. This breadth is particularly advantageous for estate administrators or companies with mixed fleets. A single service provider can thus assess the entire portfolio of mobile and semi-mobile economic assets.

For construction and agricultural machinery such as excavators or tractors, the focus is not only on technical condition but also on compliance with the EU Machinery Regulation. For boats and yachts, specific parameters such as osmosis tests or the condition of the propulsion system are included in the appraisal. Home energy storage systems for photovoltaic installations are tested for capacity using the Premium Battery Test, analogous to EV batteries. This cross-asset expertise makes it possible to assess complex portfolios efficiently and in a standardized way, without having to search for a specialized niche appraiser for every asset class.

To understand DIAVAG's positioning, a comparison with other market participants is helpful. Online estimation tools are based purely on algorithms and statistical data, without ever having seen the individual vehicle. They can capture neither accident damage nor the actual battery condition. Inspection organizations such as TÜV do offer physical inspections, but are usually tied to stationary locations and rarely have the specialized hardware for in-depth battery diagnostics for EVs or home energy storage systems.

This comparison shows that DIAVAG closes the gap between fast but imprecise online estimates and slow, stationary inspections. The combination of mobility, technical depth and legal robustness makes the model attractive for discerning private and business customers.

For commercial players such as car dealerships, leasing companies and fleet managers, time is a critical cost factor. A vehicle waiting for valuation incurs standing costs. DIAVAG offers seamless integration into existing processes for this. From a volume of 50 appraisal reports per month, individual terms and an API connection to Dealer Management Systems (DMS) are available. This allows dealers to commission appraisal reports directly from their familiar software environment and to automatically transfer the results into the vehicle file.

In addition, DIAVAG offers appraisers and large companies the hardware case including the specialized software for purchase (list price auf Anfrage). This enables companies to carry out the standardized DIAVAG workflow with their own staff, while quality assurance and the final signature are provided by DIAVAG's senior inspectors. This hybrid approach scales appraisal report creation without compromising the high standards of independence and precision. Digital data storage is GDPR-compliant on servers within the EU, which is an indispensable criterion for institutional customers.

The on-site car valuation report has evolved from a niche service into an essential tool for the modern asset trade. The combination of mobile availability, technical excellence through the Premium Battery Test and transparent fixed pricing sets new standards in the market. With preparation for the EU Battery Passport and ISO/IEC 17020 Type A conformity, DIAVAG is well positioned for upcoming regulatory requirements.

For customers, this means maximum security with minimal effort. Whether buying a used Tesla, valuing a boat for insurance purposes, or clarifying assets in an inheritance case: an independent appraisal report creates clarity and prevents disputes. The nationwide rollout in 2026 will make these standards available beyond the current regions and further drive the professionalization of vehicle valuation.