Appraisal Software with Battery Diagnostics for Experts

The focus of vehicle valuation is shifting due to electromobility, from mechanical components toward battery integrity. The battery is the most expensive component of an electric car. An appraisal that merely estimates or ignores the condition of the battery is worthless to the market. Modern appraisal software must therefore necessarily have an interface for battery diagnostics.

DIAVAG addresses this by integrating the Premium Battery Test directly into the digital workflow. This goes beyond simply reading out superficial fault memory codes. The software analyzes the state-of-health (SoH), cell balance and internal resistance. This data is essential for determining the actual market value of an EV or a home storage system. Without such well-founded diagnostics, buyers and sellers risk significant financial losses, since battery degradation correlates linearly with value loss.

DIAVAG offers a complete solution for professional appraisers. The hardware case contains all the tools needed for comprehensive asset assessment. The core is the OBD2 scanner combined with specialized diagnostic hardware for the Premium Battery Test. The set is complemented by a precise coating thickness gauge for identifying repainted areas, a tread depth gauge and a digital multimeter for basic electrical measurements.

The accompanying software guides the appraiser through a standardized inspection workflow. This ensures that every appraisal, regardless of the asset's location, has the same high quality and data depth. Photo documentation is done through the app, with every result directly linked to the source document to guarantee full source traceability. This standardization is the prerequisite for the ISO/IEC 17020 Type A certification that distinguishes DIAVAG as an independent inspection body.

For commercial players such as dealerships or fleet operators, efficiency is the decisive factor. From a volume of 50 appraisals per month, DIAVAG offers individual terms and deep system integration. Via an API connection, appraisal data can be transferred directly into existing Dealer Management Systems (DMS). This eliminates manual transcription errors and significantly speeds up the purchasing process.

Automated battery diagnostics is particularly valuable for residual value monitoring of leasing fleets. Fleet managers receive precise data on the condition of their assets, putting remarketing planning on a solid data basis. DIAVAG's independence is a key argument here: since DIAVAG itself neither buys nor sells vehicles, the appraisals are objective and serve as a reliable negotiating basis between lessors and lessees.

An appraisal is only as valuable as its acceptance by third parties. Whether in an inheritance case, a divorce, or an insurance claim, legal usability comes first. DIAVAG appraisals are created according to the guidelines of the BVSK (Federal Association of Freelance and Independent Motor Vehicle Experts). The software automates the analytical groundwork, while experienced senior inspectors control and sign off on the final review.

By complying with the ISO/IEC 17020 Type A standard, DIAVAG operates at the highest level of independence. Unlike workshops or conventional inspection organizations, which often broker additional services such as repairs or insurance, DIAVAG focuses exclusively on neutral assessment. In complex legal disputes, the appraisal serves as a well-founded basis, while a lawyer or notary is always recommended for further legal evaluation. The optional notarial hash on the Polygon blockchain also ensures complete verifiability of the document's authenticity.

While organizations such as TÜV or DEKRA often only offer basic diagnostics as part of the main inspection, DIAVAG's Premium Battery Test goes significantly deeper. The software captures cell voltages under load, analyzes the charging curve and calculates the remaining capacity in kilowatt-hours (kWh). This is especially crucial for high-value assets such as premium EVs or home PV storage systems.

Another advantage is mobility. The appraiser comes with the diagnostic equipment directly to the asset's location, whether a private garage, a dealer's lot, or a harbor for boats. This flexibility saves the customer time and transport costs. The Premium appraisal including battery diagnostics offers full cost transparency with no hidden travel fees within the regions of Hamburg, Berlin and Munich.

DIAVAG's software isn't limited to cars. The system covers over 30 asset classes, including boats, construction and agricultural machinery, and home storage systems. Especially with stationary battery storage for photovoltaic systems, there is often uncertainty about the actual value in real estate transactions. Here, the software delivers clear facts about the storage system's performance through the Premium Battery Test.

Professional assessment is also gaining importance in micromobility, such as cargo bikes or e-scooters. Insurers use these appraisals to determine replacement value after a claim. The unified software platform makes it possible to create standardized and comparable reports across all these asset classes, making DIAVAG a versatile partner for private customers and businesses alike.

Regulatory requirements for battery documentation are increasing. From February 2027, the EU Battery Passport will become mandatory for all new batteries in electric vehicles and industrial applications. DIAVAG has already aligned its software with these requirements today. The capture of lifecycle data and performance metrics complies with upcoming EU standards.

By adopting these standards early, DIAVAG offers its customers a future-proof solution. Anyone who has an appraisal made today benefits from a methodology that will remain valid in the years ahead. This is especially important for commercial players who need to prepare their processes for the European Union's new transparency rules over the long term. Data storage is handled in a GDPR-compliant manner on servers within the EU.

Time is a critical factor in transactions. A sale often falls through due to missing documents or long waits for appraiser appointments. DIAVAG guarantees an appointment within 24 hours of commissioning. Thanks to optimized software guidance, the actual on-site inspection takes less than 15 minutes. Since all data is captured digitally on the spot, time-consuming office follow-up is eliminated.

The finished PDF appraisal is delivered by email the same day. This digital workflow allows private sellers to immediately upgrade their listing with a qualified document. Dealers can price their inventory vehicles faster and bring them to sale. The combination of mobile hardware, intelligent software and fast processes sets a new standard in the appraisal industry.

To clarify DIAVAG's positioning, a comparison with other market participants is helpful. While algorithm-based estimation services rely solely on statistical values, DIAVAG delivers a physical on-site inspection. Unlike purchase portals, there is no interest in a low purchase price, since DIAVAG operates independently.