Diagnostic Case for Experts: Leasing and Purchase Options

A modern expert can no longer rely solely on a visual inspection. The DIAVAG hardware case was developed to enable seamless technical documentation in under 15 minutes on site. The OBD2 scanner forms the central technical component, penetrating deep into the control units and delivering not just superficial fault memory entries but real-time parameters. This is the foundation for every well-founded value appraisal.

The case also includes a high-precision coating thickness gauge. This tool is essential for detecting repainting and hidden accident damage on the bodywork. A digital tread depth gauge provides objective data on tire condition, while a digital multimeter enables testing of basic electrical systems. The set is complemented by a standardized photo documentation setup, ensuring that every appraisal meets the same high visual quality standards.

The integration of the Premium Battery Test hardware. While conventional inspection organizations often only offer basic diagnostics, this system allows a detailed analysis of cell balance and actual capacity. This is the decisive criterion for market value when evaluating EVs and home storage systems.

For independent experts, the question of financing the equipment arises. Investing in the hardware case, including the specialized appraisal software, should be seen as a step toward standardization. Compared to purchasing individual measuring devices separately, the closed system offers the advantage that all components are aligned with the digital workflow. The software guides the user through the inspection, minimizing sources of error.

Leasing models or financing can preserve liquidity, but the decisive factor is amortization through time savings. Since the on-site workflow is optimized to under 15 minutes, experts can achieve a higher appointment frequency. The system is designed to produce the BVSK-compliant PDF appraisal the same day, which boosts customer satisfaction and thus order volume.

For larger organizations, such as dealerships or fleet operators requiring more than 50 appraisals per month, DIAVAG offers individual terms. Here, the focus is often not on purchasing the hardware but on integration into existing Dealer Management Systems (DMS) via API, to fully automate the valuation process.

In the valuation of electric vehicles and residential PV storage systems, the battery is the most valuable individual component. A conventional appraisal without a detailed battery report is barely meaningful for these assets. The Premium Battery Test included in the case provides the State-of-Health (SoH) as a percentage compared to new condition. Parameters such as cell voltages, internal resistances, and charging curves are analyzed.

This test is standard for all Premium appraisals at DIAVAG at a flat rate. For the expert, this means a significant upgrade to their service. They deliver data that goes beyond the standard diagnostics of workshops. This is particularly important in warranty cases or real estate transactions involving home storage systems, to legally document the actual residual value.

Preparation for the EU Battery Passport, which becomes mandatory from February 2027, is already integrated into the hardware and software. Experts who invest in this system today are thus equipped for upcoming regulatory requirements. Independence remains guaranteed: DIAVAG does not sell repairs or spare parts, but exclusively provides the objective data basis.

A key advantage of the DIAVAG system is its coverage of over 30 different asset classes. While classic inspection bodies such as TÜV or DEKRA focus almost exclusively on cars, the hardware case enables the professional valuation of boats, construction and agricultural machinery, cargo bikes, e-scooters, and home storage systems. This breadth opens up entirely new market segments for the expert.

For boats and yachts, for example, the mobile hardware enables inspection directly in the harbor or in winter storage. For construction machinery such as excavators or wheel loaders, the focus is on documenting the technical condition and residual value, often in the context of insurance cases or business transfers. The standardized workflow ensures that, despite the diversity of assets, an appraisal of consistently high quality is always produced.

The mobility of the system is key here. The inspector comes to the asset, whether it's an underground garage in Berlin, a farmyard in Hamburg, or a harbor in Munich. This flexibility, combined with the flat-rate model, creates transparency for the end customer and planning certainty for the expert.

An appraisal is only as valuable as its acceptance by third parties. DIAVAG relies on the highest standards to support the legal usability of the results. All experts work according to BVSK-compliant guidelines. In addition, the system is designed as an inspection body according to ISO/IEC 17020 Type A, representing the certification of independence. This means there are no economic ties whatsoever to vehicle dealers, workshops, or insurers.

In cases of inheritance, divorce, or insurance disputes, this independence is crucial. The PDF appraisal, signed by a senior inspector, offers full source traceability and serves as an objective basis for negotiations. Optionally, every appraisal can be provided with a notary hash on the Polygon blockchain, which technically rules out subsequent manipulation of the data.

For legal questions, DIAVAG always refers to collaboration with lawyers or notaries. The appraisal provides the technical facts and the market value according to JVEG logic, while the legal classification is carried out by the relevant professionals. This clear separation underscores the professionalism and seriousness of the service.

For commercial users such as dealerships or fleet managers, the DIAVAG workflow offers measurable efficiency gains. From a volume of 50 appraisals per month, individual terms are agreed upon that go far beyond the private customer model. The connection to existing Dealer Management Systems (DMS) via API allows valuation data to be transferred directly into internal processes.

This is particularly advantageous for the purchase of used vehicles or residual value monitoring of leasing fleets. The standardized process ensures that every location of a dealer group applies the same quality criteria. Data is stored in a GDPR-compliant manner on servers within the EU, which is a critical security feature for companies.

By using DIAVAG hardware, dealers can also precisely determine the condition of EV batteries during purchase. This reduces the risk of costly bad purchases and builds trust in resale to end customers. The Premium Battery Test thus becomes a selling point in the used car trade.

Time is a critical factor in vehicle transactions or claims cases. DIAVAG has optimized the process so that often less than 24 hours pass between commissioning and the finished appraisal. The mobile expert schedules an appointment at the asset's location at short notice. Thanks to the calibrated hardware in the case, the actual inspection rarely takes longer than 15 minutes.

After the on-site data collection, the information is transmitted encrypted to headquarters. There, the final review and signing by a senior inspector takes place. The customer receives the BVSK-compliant PDF the same day. This speed is a clear competitive advantage over traditional appraisal offices, which often need several days to prepare their reports.

The flat-rate model for standard and premium assets also eliminates lengthy cost estimates. The customer knows exactly what costs to expect, with no hidden fees. Details on the terms are explained in a personal demo.

The requirements for documenting technical assets are steadily increasing. With the EU Machinery Regulation 2023/1230 and the upcoming EU Battery Passport, new standards for safety and transparency are being set. The DIAVAG hardware case is already designed to meet these requirements today. Experts who use this system position themselves as specialists in the digital transformation of the appraisal industry.

The software covers 9 different due diligence workstreams and ensures that new models and technologies can be evaluated immediately. This applies not only to cars, but also to the growing market for home storage systems and micromobility. A cargo bike or an e-scooter requires different testing parameters than an excavator, yet the DIAVAG platform unites these requirements in a single, mobile solution.

Investing in a professional diagnostic case for experts is far more than buying a tool. It is the entry point into a highly efficient, legally sound, and future-oriented business model that strengthens the expert's independence and offers the end customer maximum transparency.