Getting a Battery Test for the Polestar 2: SoH Findings and Value Assessment

The Polestar 2 has established itself as one of the leading electric sedans. But like any electric vehicle, its battery is subject to a chemical aging process. Factors such as charging behavior, the number of DC fast-charge cycles, and thermal stress affect capacity over time. Since the battery is the most expensive individual component of the vehicle, its condition is decisive for the replacement value or sale price.

A superficial check of the vehicle history isn't enough to identify hidden signs of degradation. A professional battery test reveals how much of the original energy capacity is actually still available, especially as the manufacturer's battery warranty (usually 8 years or 160,000 km at 70 percent SoH) is nearing its end. Without an independent appraisal, buyers and sellers bear considerable financial risk. DIAVAG provides an objective basis here through standardized measurement procedures that go beyond simply reading the fault memory.

When appraising a Polestar 2, DIAVAG relies on what's known as the Premium Battery Test. This test is an integral part of the premium appraisal. Unlike simple diagnostic tools that merely copy static values from the battery management system (BMS), our procedure analyzes the dynamic parameters of the high-voltage storage system.

The appraiser uses calibrated hardware consisting of an OBD2 scanner and specialized diagnostic software. Among other things, the State of Health (SoH), cell balance, and internal cell resistance are measured. A large voltage difference between individual cells, for example, can indicate an emerging defect or uneven aging, even if the overall capacity still appears good. The result is recorded in a detailed PDF report with full source traceability, which states the remaining capacity in kilowatt-hours (kWh) and the percentage health condition compared to new. This process is BVSK-compliant and is finally reviewed and signed by a senior inspector.

A key advantage of DIAVAG is its mobility. You don't need to visit a workshop or leave your vehicle at an inspection center for a day. The appraiser comes directly to the asset's location - whether it's your private garage, a dealer's yard, or a public parking lot in the areas of Hamburg, Berlin, or Munich. This saves time and logistical effort.

The entire on-site inspection workflow usually takes less than 15 minutes. During this time, the appraiser not only performs the battery test but also documents visual condition, measures paint thickness to identify accident damage, and checks tire tread depth. Through this standardized process, we guarantee consistently high appraisal quality regardless of location. Appointments are available at short notice within 24 hours, which is particularly advantageous for time-critical transactions such as a private sale or a lease return.

In legally relevant situations such as inheritance matters, divorces, or insurance claims, the quality of the appraisal is decisive. DIAVAG acts as an ISO/IEC 17020 Type A inspection body, which guarantees the highest level of independence. We sell no vehicles, no insurance, and perform no repairs. Our sole task is the objective assessment of technical condition.

The appraisals are prepared in a BVSK-compliant manner. The German Federal Association of Freelance and Independent Motor Vehicle Appraisers (BVSK) sets high standards for expert qualification. A DIAVAG PDF appraisal signed by a senior inspector is therefore a solid document for negotiations or submission to authorities. For complex legal questions, we always recommend consulting a lawyer or notary, with our appraisal serving as the technical basis. Optionally, we offer a notarial hash on the Polygon blockchain to permanently verify the tamper-proof nature of the documentation.

Transparency begins with pricing. While many appraisal firms charge by the hour or based on vehicle value, DIAVAG offers clear flat rates. For the Polestar 2, which falls into the EV category, the premium rate applies. This price includes all services: travel within the areas, the complete vehicle inspection, the Premium Battery Test, and the creation of the digital appraisal.

There are no hidden fees or surcharges for battery diagnostics. This flat rate allows both private customers and commercial players to precisely calculate the cost of the valuation. For dealers or fleet operators requiring a larger volume of 50 or more appraisals per month, we offer individual terms and an API connection to existing dealer management systems (DMS). This allows the integration of appraisal data into the purchasing process or inventory management.

Many vehicle owners primarily associate appraisals with organizations such as TÜV or DEKRA. However, there are structural differences in approach and scope, especially in battery diagnostics for electric vehicles like the Polestar 2.

While inspection organizations focus on the periodic technical inspection (HU) and general road safety, DIAVAG specializes in detailed value assessment and in-depth technical diagnostics. Our service is particularly distinguished by its focus on seven different asset classes and independence from workshop operations.

The Polestar 2 is offered with various battery configurations, most commonly the 78 kWh battery (Long Range) or the 69 kWh variant (Standard Range). For a precise assessment, the appraiser needs to know which cell chemistry and gross or net capacities are present. The Premium Battery Test compares the measured actual values with the manufacturer-specific target values.

A critical point for the Polestar 2 is battery thermal management. Frequent fast charging without prior preconditioning can accelerate degradation. Our test identifies whether the battery is operating within normal wear parameters or whether atypical deviations exist. This data is relevant not only for current market value but also for assessing remaining service life, taking the usage profile to date into account. We deliver the hard facts so you can make an informed decision.

Regulatory requirements for documenting electric vehicle batteries are increasing. Starting in February 2027, the EU Battery Passport will become mandatory for new batteries in electric vehicles. This digital passport is intended to store information about origin, composition, and above all the condition of the battery over its entire lifecycle. DIAVAG is already prepared for these requirements today.

Our standardized inspection protocols already capture many of the data points that will be required in the future Battery Passport. By using our services, vehicle owners and dealers secure documentation quality that is future-proof. Digital storage and optional blockchain verification ensure that the battery's history can be proven completely and tamper-proof. This will be a decisive factor for the resale value of electric vehicles on the European market in the future.

A battery test for the Polestar 2 is not an unnecessary expense but an investment in safety and transparency. Whether for a private sale, preparing for a lease return, or as part of a legal dispute, an independent appraisal creates clarity. With DIAVAG's mobile service, you receive a professional document at a fair flat rate in the shortest possible time.

The combination of BVSK qualification, state-of-the-art hardware, and the independence of an ISO 17020 Type A inspection body makes DIAVAG the ideal partner for assessing high-value technical assets. Don't rely on estimates or vague dashboard displays. Book a demo for professional documentation and secure the value of your vehicle.