Vehicle Appraisal Quickly On-Site: Mobile Service at a Fixed Price

Classic vehicle valuation usually requires considerable logistical effort. Vehicle owners must coordinate appointments at stationary testing centers, transport the vehicle there, and often accept longer waiting times. DIAVAG breaks this pattern by having the appraiser come directly to the asset. Whether in the home garage, on the yard of a craft business, or at the harbor with a sports boat: the location plays no role in the quality of the appraisal. In the regions of Hamburg, Berlin, and Munich, the appointment is usually scheduled within 24 hours of booking.

This mobile approach is particularly advantageous for unregistered vehicles or high-value assets whose transport would involve risks and costs. The on-site inspection takes less than 15 minutes, as the appraiser follows a highly standardized workflow. By using mobile devices and calibrated hardware, all relevant data is captured digitally immediately. This enables a processing speed that was previously hardly achievable in traditional appraisal practice. For the customer, this means maximum time savings with full transparency about the vehicle's condition.

A key obstacle in commissioning appraisals is often the unclear pricing structure. Many appraisers charge by the hour, travel costs, or the value of the object, making the final amount difficult to calculate. DIAVAG relies on a strict fixed-price model here. The standard appraisal for cars, boats, cargo bikes, or e-scooters is offered at a transparent fixed price. This includes all costs, including travel within the regions.

For more complex assets such as electric vehicles or home storage systems, a specific fixed price applies. This premium rate is justified by the additional technical effort, in particular the integrated Premium Battery Test. While other providers often charge separate fees for a detailed battery diagnosis, this test is included in DIAVAG's premium package. For commercial customers such as car dealers or fleet operators reaching a volume of more than 50 appraisals per month, individual terms are agreed. This price stability creates trust and allows both private individuals and companies to plan the costs for a professional valuation precisely into their budget.

The quality of an appraisal depends significantly on the precision of the data collection. DIAVAG appraisers use a specially assembled hardware case that guarantees an objective assessment. This includes OBD2 scanners for reading the fault memory and the vehicle's real-time parameters. A paint thickness gauge checks the paint thickness at various points to identify repaints or hidden accident damage beyond doubt. Tread depth gauges and digital multimeters complement the technical instrumentation.

Every step of the inspection is digitally prescribed. The appraiser follows an app-guided checklist that ensures no relevant detail is overlooked. The standardized photo documentation captures the asset from defined angles and documents any defects in a tamper-proof manner. This process minimizes the appraiser's subjective discretion and ensures consistently high quality of results, regardless of whether the inspection takes place in Hamburg or Munich. The result is a BVSK-compliant PDF appraisal with complete source traceability, delivered the same day after review by a senior inspector.

For electric vehicles, the drive battery is the most expensive component and largely determines the residual value. A simple visual inspection or reading the onboard computer is not sufficient here to make a reliable statement about the condition. DIAVAG therefore integrates the Premium Battery Test as standard into every EV appraisal. This determines the State of Health (SoH), cell balance, and actual kWh capacity. Internal resistance and the charging curve are also included in the assessment.

This in-depth diagnostics is a decisive differentiating feature compared to classic testing organizations, which often only offer basic diagnostics. The detailed findings give buyers and sellers the certainty that the battery delivers the promised performance. In light of upcoming EU regulations, such as the EU Battery Passport starting February 2027, DIAVAG is already technically prepared today to meet the required transparency standards. An EV without certified battery proof will be significantly harder to sell on the used market in the future. The DIAVAG appraisal provides the necessary factual basis here.

A decisive factor for the usability of an appraisal is the independence of its creator. DIAVAG acts as a neutral entity: the company does not sell vehicles, does not broker insurance, and does not carry out repairs. This strict separation of trading and workshop interests is the prerequisite for the appraisals to be recognized by third parties. The appraisers are qualified according to BVSK standards, and the organization operates according to the strict criteria of ISO/IEC 17020 Type A for inspection bodies, which represents the highest level of independence.

In legal contexts such as inheritances, divorces, or insurance cases, this neutrality is indispensable. An appraisal created by a party with a vested interest in the vehicle's value can easily be contested in court or before authorities. DIAVAG appraisals are based on objective data, with experienced appraisers always retaining final assessment authority. For complex legal questions, customers should always consult a lawyer or notary, but the DIAVAG document provides the solid technical basis for their work. Optionally, the appraisal can be secured with a notarial hash on the Polygon blockchain to permanently prove the integrity of the data.

While most appraisal services focus on passenger cars, DIAVAG covers a total of seven asset classes. In addition to cars and EVs, these include boats, construction and agricultural machinery, cargo bikes, e-scooters, and home storage systems. This coverage of seven asset classes enables a consistent valuation of diverse holdings from a single source. Especially with special assets such as PV home storage systems or construction machinery, technical expertise beyond pure mechanics is required. Here, DIAVAG's electronic competence and specialized hardware come fully into play.

For boats, for example, the inspection covers not only the hull condition but also the drive technology and onboard electronics. For construction and agricultural machinery, operational safety is often just as important as residual value, especially with regard to the EU Machinery Regulation. The ability to assess these different categories with the same high standard and at a fixed price makes DIAVAG a versatile partner for private individuals and companies with mixed holdings. A farmer can thus have both their tractor and the home storage system of their solar power system assessed without having to commission different specialists.

Digitalization of the appraisal process at DIAVAG does not end with the creation of a PDF. To protect the integrity of the results in the long term, the company relies on modern encryption technologies. Every appraisal can optionally be provided with a digital timestamp and a hash value on the Polygon blockchain. This creates an immutable proof that the document has not been tampered with since the moment of signing by the senior inspector. At a time when digital documents can easily be edited, this represents a significant security gain.

Data storage takes place according to the highest security standards such as ISO 27001 and in compliance with GDPR on servers within the European Union. For commercial users, DIAVAG also offers an API connection to common Dealer Management Systems (DMS). This allows dealerships and fleet operators to seamlessly integrate the appraisals into their existing digital processes. The combination of mobile on-site data collection and highly secure digital archiving makes the system efficient and future-proof. Customers receive their completed appraisal by email on the day of the inspection, which massively increases response speed in sales or damage reports.

DIAVAG sees itself not only as a service provider for private customers but also as a technology partner for the industry. For dealerships and fleet managers who regularly need to assess a large number of vehicles, DIAVAG offers scalable solutions. From a volume of 50 appraisals per month, individual framework agreements are concluded that enable cost-efficient inventory valuation. The standardized reports significantly ease residual value tracking and the preparation of lease returns.

Another pillar is the sale of the DIAVAG hardware case, including the associated software, to independent appraisers. For a license fee, external appraisers gain access to the proven system and can conduct their own inspections according to the DIAVAG standard. This promotes nationwide standardization of quality standards in the appraisal industry. Through easy handling and automated report generation, appraisers can increase their own productivity and focus on technical analysis while the software handles administrative documentation.

When comparing DIAVAG with classic organizations such as TÜV or DEKRA, clear structural differences emerge. While the large testing organizations focus on the legally mandated main inspection (HU) and stationary testing centers, DIAVAG specializes in vehicle appraisal without a workshop. The following table illustrates the differentiating features:

DIAVAG does not replace the main inspection but offers a more specialized and flexible package for value determination and technical condition description. Especially the focus on battery health and mobility makes the service the preferred choice for modern vehicle owners.