Mobile Appraiser for Value Assessments and Battery Diagnostics

Classic vehicle valuation often requires considerable logistical effort. Vehicle owners must coordinate appointments at inspection centers, accept travel time, and bridge waiting periods. A mobile appraiser breaks up these structures. The appraiser comes directly to the location of the object, whether that's a private garage, the yard of a trade business, or a mooring at the harbor. This service is aimed at customers who value precision and time savings.

DIAVAG has standardized this process. In the regions of Hamburg, Berlin, and Munich, appointments are scheduled within 24 hours. On site, the appraiser uses calibrated hardware to collect objective data. Since DIAVAG does not purchase vehicles, broker insurance, or perform repairs, independence is preserved. This is a decisive factor for the legal usability of the appraisals. The results are compiled into a BVSK-compliant PDF report, available the same day.

While conventional inspection organizations focus primarily on passenger cars, DIAVAG covers seven different asset classes. This breadth is necessary because modern portfolios often contain diverse technical assets. The assessment covers classic combustion-engine cars, electric vehicles, boats, construction and agricultural machinery, cargo bikes, e-scooters, and stationary home storage systems for photovoltaic installations.

Each class requires specific expertise and adapted inspection methods. A boat in the harbor requires different parameters than a home storage unit in the basement of a single-family home. A mobile appraiser must be able to technically capture these differences. For construction and agricultural machinery such as excavators or tractors, on-site inspection is often the only economically sensible option, as transport to an inspection center would be disproportionately expensive. DIAVAG offers a uniform solution here, signed off by senior inspectors and thus meeting the highest quality standards.

A mobile appraiser is only as good as their tools. DIAVAG relies on a standardized hardware case, which is also sold to independent partners for auf Anfrages. This case contains all the necessary instruments for an in-depth technical analysis. This includes an OBD2 scanner for reading the fault memory and relevant real-time vehicle parameters. A coating-thickness gauge allows precise identification of repainting and hidden accident damage.

In addition, tread-depth gauges for tires and digital multimeters for electrical systems are used. Documentation is carried out via a standardized photo set that guarantees a complete and tamper-proof record of the condition. This technological approach minimizes subjective assessments and replaces them with measurable facts. This builds trust among both buyers and sellers and forms the basis for a reliable value assessment.

For electric vehicles and home storage systems, the battery represents the most valuable component. A superficial inspection is not enough to determine the actual market value. DIAVAG therefore integrates the Premium Battery Test as standard into the premium appraisal for auf Anfrages. This test goes far beyond simply reading the onboard computer. It determines the state of health (SoH), analyzes the cell balance, and measures the actual kWh capacity as well as internal resistance.

This data is essential for assessing the remaining lifespan and performance of the battery. Given the upcoming EU Battery Passport, which becomes mandatory from February 2027, such detailed diagnostics are already a necessary investment in future-proofing today. A mobile appraiser offering this depth provides a decisive argument for preserving value or successfully reselling an electric vehicle or a property with PV storage.

Appraisals are often needed in contexts requiring legal robustness. This applies in particular to inheritances, divorce proceedings, insurance claims, or lease returns. In such situations, the appraiser must demonstrate that they work independently and according to recognized technical standards. DIAVAG meets these requirements through qualification under BVSK standards and its status as an inspection body under ISO/IEC 17020 Type A. This represents the highest level of independence.

The appraisals are signed by senior inspectors and can optionally be provided with a notarial hash on the Polygon blockchain. This makes the document tamper-proof and permanently verifiable. In complex legal matters, customers should always consult a lawyer or notary, but the DIAVAG appraisal provides the necessary expert basis for such consultations. These reports also provide a solid basis for legal disputes under the German Judicial Remuneration and Compensation Act (JVEG).

A common criticism of appraisal services is the unclear pricing due to hourly billing and travel fees. DIAVAG counters this with a transparent fixed-price model. The standard appraisal for cars, boats, cargo bikes, or e-scooters costs auf Anfrages. For more complex assets such as EVs, home storage systems, or high-value objects, the price is auf Anfrages, with the Premium Battery Test already included.

In the regions of Hamburg, Berlin, and Munich, no additional travel costs apply. This fixed-price approach allows private customers and businesses to calculate the cost of an assessment precisely. There are no hidden fees for producing the PDF report or archiving the data. This price stability is an essential part of the customer-oriented approach and distinguishes the service from many local appraisal offices, which bill individually based on effort.

For commercial customers such as car dealerships, leasing companies, or fleet operators, a mobile appraiser offers significant economies of scale. From a volume of 50 appraisals per month, DIAVAG provides individual terms. A central advantage for B2B customers is the API connection to existing Dealer Management Systems (DMS). This enables a seamless data flow and automated integration of the appraisals into internal processes.

This allows dealers to objectify their vehicle purchasing and inventory valuation. The fast availability of the appraisals shortens vehicle standing times and increases turnover speed. In addition, DIAVAG offers independent appraisers the opportunity to acquire the proven hardware and software system in order to build their own locations. This supports the nationwide rollout planned for 2026 and ensures widespread availability of the high quality standard.

In the vehicle valuation market, there are numerous players with differing interests. Vehicle purchasing platforms often offer free valuations, but pursue the goal of buying the vehicle as cheaply as possible. Workshops, in turn, have an interest in repair orders. A mobile appraiser from DIAVAG operates completely independently of these interests. Since the company neither sells vehicles nor performs repairs, there is no incentive to artificially influence the value of an object.

This independence is invaluable to the customer, as it guarantees the objectivity of the appraisal. Compared to pure algorithm-based estimation services that rely solely on market data, the on-site inspection provides a real picture of the technical condition. Only through physical inspection can defects such as hidden corrosion, electrical malfunctions, or the actual battery capacity be reliably captured. This makes the mobile appraisal an indispensable tool for anyone who needs a fair and fact-based assessment.

The process of a mobile inspection is optimized for maximum efficiency without neglecting thoroughness. After booking online, the appointment is confirmed within a short time. The appraiser arrives at the asset's location at the agreed time. The actual on-site inspection usually takes less than 15 minutes. During this time, all relevant data points are captured digitally and transferred directly into the system.

The standardized photo documentation ensures that all value-relevant details are recorded. After completing the on-site inspection, the data is validated by a senior inspector. The finished PDF appraisal is delivered to the customer the same day. This fast turnaround is particularly advantageous for short-term sales decisions or urgent insurance claims. The customer receives a professional document that can be used immediately for negotiations or official purposes.