Three minutes.
One certificate.
Connect the AVILOO FLASH Test and receive a comprehensive diagnosis of your battery health in just 3 minutes.
The new independent AVILOO Battery Certificate
The independent full analysis
The certificate confirms the state of health (SoH) of the traction battery and ensures that it meets safe operating standards.
The SoH value is calculated using the AVILOO algorithm based on real vehicle data.
The report includes a comparative analysis with similar electric vehicles, allowing buyers to evaluate battery performance within the vehicle class.
A visual scale clearly indicates whether the vehicle's battery is performing below average, average, or above average.
The test checks the functionality of the battery management system, sensor accuracy, important parameters at pack and cell level, and communication stability.
The voltages of the entire battery pack and individual cells are analyzed to rule out hidden defects.
The report identifies anomalies or potential risks, avoiding costly surprises after purchase.
In addition to the WLTP range, we also provide a real-world range based on comparable vehicles and an individual range based on the vehicle's previous average consumption.
The AVILOO FLASH Test is quick (3 minutes), easy to perform, and completely independent – the official certificate is issued immediately.
The results are securely stored and can be accessed at any time via QR code, allowing buyers and sellers to verify authenticity directly.
Results
The State of Health (SoH) represents the condition of the vehicle's high voltage battery at the time of testing with the AVILOO FLASH Test. The FLASH Test SoH is calculated using a statistical model that takes into account thousands of similar vehicles and multiple predictors such as mileage, age, various SoH estimation signals from the Battery Management System (BMS), energy counters, cell voltage spread and many other signals, and can therefore reliably estimate the current condition of the vehicle under test. It is expressed as a percentage from which the current storable energy and range can be calculated as follows:
Actual available energy = SoH/100 * energy in new condition.
Current range = SoH/100 * new range.
Rating
The AVILOO Benchmark compares the State of Health (SoH) with that of similar vehicle types under similar conditions, providing a meaningful reference to help assess battery condition relative to comparable vehicles and support informed decisions on maintenance, resale value and warranty claims. AVILOO has by far the most comprehensive database of tested electric vehicles in the industry and therefore provides the most accurate benchmark. To do this, a non-linear model is used to determine the median degradation of a vehicle type, and the percentile of the tested vehicle is derived from this model.
Battery Checks
The Battery Checks provide verification of key battery system components, including the battery management system (BMS), sensors, measurement accuracy, individual cell voltages and vehicle communication. This ensures that the battery system is operating correctly and reliably.
For example, the vehicle communication check verifies that all signals are plausible, have the correct sampling rate and meet the required quality standards.
Details of all the checks are given in the following sections.
Energy
Gross Energy
Gross Energy is the total energy physically stored in the battery. It is a theoretical value because the average car cannot be charged high enough (upper buffer) and discharged low enough (lower buffer), and losses within the battery further reduce the extractable energy.
Net (Nominal) Energy
Net (Nominal) Energy is the gross energy reduced by buffers and internal battery losses. It is therefore the energy available from 100% State of Charge (SoC) to standstill. It is based on WLTP standards (see the WLTP section for more information).
Usable Energy
Usable Energy is the Net (Nominal) Energy reduced by the emergency reserve and refers to the energy available from 100% to 0% SoC. The emergency reserve is intended to ensure that the driver is always able to
reach the next charging station, even if the SoC is already 0%. However, it is important to note that not all vehicles have this emergency reserve; for these vehicles, the net energy and usable energy are the same.
New & Current
The values shown in this table are separated into new and current values, the new values represent the amount of energy storable in new conditions and are either provided by the manufacturer or estimated by AVILOO, the current values are calculated from the estimated SoH and the new values.
Range
WLTP Range
The WLTP Range represents the driving range of a vehicle as determined by the Worldwide Harmonised Light-Duty Vehicles Test Procedure (WLTP). It represents the official range declared by the Original Equipment Manufacturer (OEM) and during this test procedure the vehicle is driven from 100% SoC (State of Charge) to standstill and therefore the net (nominal) energy of the vehicle's battery is used during the WLTP cycle.
Typical Range
The Typical Range is a more realistic range than the WLTP Range because it is based on the real world consumption of thousands of similar vehicles tested by AVILOO. To make it even more realistic, the range is calculated with the usable energy between 100% and 0% SoC, therefore the emergency reserve is not included in this range and it therefore represents the everyday range.
Personal Range
The personal range refers to the driving range of the tested vehicle and is calculated from the individual consumption of the tested vehicle if this value is provided by the control unit. If not, the personal range cannot be calculated and is therefore an optional value.
Execution Protocol
The execution protocol lists all the steps from the start of the flash test to its completion, providing a clear overview of the entire process.
Sensors
Sensor checks verify the accuracy and availability of voltage, current and temperature measurements to detect anomalies, sensor faults or erratic cell behaviour that could affect battery performance and safety.
BMS
This section shows the State of Charge (SoC) and State of Health (SoH) as reported by the Battery Management System (BMS) and therefore not calculated by AVILOO.
The calculation accuracy checks identify deviations between the SoC measured by AVILOO and the BMS SoC, and between the SoH measured by AVILOO and the BMS SoH. These checks help ensure data reliability and detect potential sensor errors.
Low data reliability and potential sensor errors can lead to inaccurate battery diagnostics, poor performance assessments, incorrect maintenance decisions, increased risk of undetected battery problems and ultimately reduced safety and shorter battery life.
Measurements
This section provides the measured battery temperature, cell voltage, pack voltage and average current values, and warns if the values are too extreme or if there is a large spread between the minimum and maximum values. These checks enable early detection of thermal or electrical imbalances, potential safety hazards and signs of cell ageing or defects.
Cell Voltage Diagram
The cell voltage graph shows the individual voltage of each cell in volts (V). This makes it possible to detect cell spreads.
Cell spreads refer to the difference in voltage between the highest and lowest individual cells in a battery pack. A large spread can indicate imbalance, ageing or faults in specific cells, which can negatively affect the overall performance, efficiency and safety of the battery. Therefore, the aim is for all cell voltages to remain close to the median to ensure balanced performance and optimal battery health.
Usage Rating
Usage Rating Benchmarking is coming in Q4 2025
Benchmarking, transparency, and assurance
Clarity for buyers. Trust for sellers
The new independent AVILOO Battery Certificate is the most innovative independent battery analysis for buyers and sellers of used electric vehicles (EVs) and plug-in hybrid vehicles (PHEVs). It provides a clear, data-based assessment of the battery state, enabling buyers and sellers to make informed decisions.
AVILOO PREVIEW:
Honest insights in seconds
What is the AVILOO PREVIEW?
It is a compact, easy-to-understand preview of an AVILOO Battery Certificate – specially developed for the online used car market. It immediately indicates that the electric vehicle has undergone an independent battery test and that the traction battery has been professionally checked.
What does the PREVIEW show?
The PREVIEW ensures visibility and trust:
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Confirms the technical inspection of the traction battery
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Shows the battery's state of health (SoH)
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Visualizes the SoH in comparison to comparable vehicles
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Verifies central battery function
Tip: The complete AVILOO Certificate provides even deeper insights – ask for it!
State of Health (SoH) in percent
Benchmarking with comparable EVs
QR Code & link to the full report
More results on the original certificate
The main advantages of AVILOO PREVIEW
for the used EV market
More visibility & faster sales in online ads
More confidence. Less risk. Higher vehicle value.
Seamless Integration & Automation for Sellers
More transparency & fewer problems post-sale
AVILOO CERTIFIED
The “AVILOO Certified” seal confirms that the traction battery of an electric or hybrid vehicle has been tested in accordance with the AVILOO FLASH or PREMIUM Test procedures and meets the necessary criteria for safe operation.
The SoH value was determined using the AVILOO FLASH or PREMIUM Test and is within a safe range for vehicle operation.
The calculation is based on data provided by the vehicle, which is evaluated by AVILOO algorithms using statistical and analytical models.
Deviations in the SoH value can be caused by faulty or manipulated data in the control units.
The battery management system is functioning properly.
The battery sensors are functioning properly.
The battery readings are within the normal range.
The voltages of the battery cells are stable.
Vehicle communication runs smoothly.
In at least 95% of reference measurements, the maximum possible deviation of the SoH value does not exceed ±3%.
The test result only describes the state of the battery at the time of testing and is not a prediction of its future performance.
The calculation is based exclusively on data provided by the vehicle, which is evaluated by AVILOO algorithms using statistical and analytical models.
Defects or faults for which the vehicle does not provide any data via the diagnostic interface – such as mechanical damage or external influences – cannot be detected and are not included in the diagnosis.
The AVILOO Certified seal provides transparency and certainty regarding the state of the battery – independently and reliably in the used car market.
Testimonials
We are extremely satisfied with our collaboration with the AVILOO team. Thanks to their comprehensive support, we were able to integrate AVILOO's battery diagnostic system into our existing structure quickly and without any problems.
Eva Rothe
Commercial Director, Arval Deutschland GmbH
AVILOO offers a fantastic solution in the field of electric vehicle battery diagnostics. It combines innovative technology with sustainability and data-driven decisions. Overall, AVILOO has proven itself to be an important partner for anyone who relies on electric vehicles and wants or needs to continuously monitor their battery status.
Roman Rott
Customer Center Manager, Used Cars, WOLFGANG DENZEL AUTO AG
The biggest advantage we have found is that the FLASH Test is easy to perform, does not take much time, and can be carried out in parallel with other tests. We have now performed several hundred tests and are very satisfied.
Alem Dulic
Head of Technical Department, NAF AS
AVILOO and the Battery Certificate enable us to increase transparency and trust when our customers purchase used electric vehicles – while also helping our dealers to overcome the challenges they face. This is a decisive factor in the e-mobility market.
Alizé Monville
Venture Development Manager, mobile.de GmbH
We work exclusively with AVILOO to check battery performance/charge status and are very satisfied with the results. The FLASH Test also allows us to obtain results within a few minutes as part of a purchase inspection. We print out the certificates and include them in our used car file so that we can present the condition of the vehicle to the customer at any time.
Gerhard Hollaus
Head of Sales, Used Cars, Pappas Holding GmbH
I have to be honest: I don't know of any other device that works so easily, intuitively, and thoughtfully. The battery test is quick and straightforward – and before I'm even back at my desk, the certificate is already on my computer. The integrated SIM card is a real game changer: no plugging in, no problems with data transfer. No matter how quickly you get back to the office, the result is already there. I'm impressed!
Klemens Neher
Service Management, Auto-Team GmbH
I am delighted that this cooperation with AVILOO will enable my customers to determine the health of their batteries themselves, so they always know exactly what condition their high-voltage battery is in.
Patrick Hinkämper
Certified automotive expert (DESAG), HP-Fahrzeugtechnik
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Better margins, faster sales, greater customer trust, and much more. Read here about the profit-maximizing benefits of independent battery certificates...
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Do you have any
questions?
Some questions come up again and again. If you're unable to find your question, we will be happy to assist you personally:
The manufacturer-independent, objective AVILOO PREMIUM Test is available for both fully electric vehicles and plug-in hybrid vehicles.
You can check whether your vehicle is approved for the AVILOO PREMIUM Test in our database:
We are constantly expanding the list and regularly adding new models.
The AVILOO PREMIUM Test was developed for end customers. It records a complete charging cycle of the traction battery, providing a particularly accurate and comprehensive assessment. The FLASH Test is designed for other areas of application.
In some cases, the vehicle data collected is checked manually by our technical team. This additional quality control may cause delays, but our team will do its best to deliver your certificate as quickly as possible.
The QR code on the printed AVILOO Battery Certificate leads directly to the original digital version on the AVILOO website. By comparing the digital and printed data, the authenticity of the certificate can be clearly verified.
The State of Health (SoH) read by the battery management system (BMS) is based on manufacturer-specific algorithms and can differ significantly from the actual state of the battery – sometimes being too high or too low. The AVILOO Certificate, on the other hand, provides an independent, objective assessment of the battery state based on a comprehensive technical analysis. Not only is the actual SoH determined, but the battery is also checked for possible defects and anomalies. This provides a comprehensive picture of the functionality and safety of high-voltage batteries.
The AVILOO Box is specially configured for one-time use. It remains the property of AVILOO GmbH and must be returned within 4 weeks of receiving the certificate.
A return label is included in the package. You can use this to return the box easily and free of charge at a post office.
Yes, the independent AVILOO PREMIUM Certificate can be used as objective proof of the condition of the battery in legal disputes.
We are working hard to roll out the AVILOO PREMIUM Test internationally. If your country is not currently supported, please contact us at:
The Early Access Test allows you to test a vehicle before its official release with the PREMIUM Test – ideal for models that are still in the final testing phase.
The AVILOO PREMIUM Certificate displays the so-called State of Health (SoH) – i.e. the health status of your battery – as a percentage. In addition, a realistic range is derived from this. All values are displayed transparently, clearly and in an easy-to-understand manner.
