The battery is the most expensive part of an EV - and the only one you can’t see. We give you an independent, certified assessment of its condition and value - before you sign.
Tested to the CARA standard. The result doesn't depend on who pays for the test.
Every battery has a story.
We read it, certify it and value it.
A reliable battery assessment combines BMS parameter readings, cell-health analysis and a valuation of the battery's real market value. Buyers, sellers and vehicle owners can then make decisions based on measured data.
The test begins with a non-invasive reading of data stored by the battery management system. We analyse SOH, usable capacity, cell voltage and balance, internal resistance, temperature and charging history. Comparing more than 50 parameters helps identify uneven wear, degradation and faults that a normal test drive cannot reveal. Mobile diagnostics can be completed before an electric car or plug-in hybrid is bought or sold.
Explore mobile diagnosticsThe traction battery accounts for a substantial share of an EV's value, so age and mileage alone cannot support a credible valuation. The BHV algorithm combines measurements, cell condition, available capacity and market data. The result is an estimated residual value and a clear indicator that supports negotiation, risk assessment, leasing, insurance and long-term vehicle planning.
Learn about BHV valuationA Voltified certificate presents the diagnostic result in a clear, verifiable document. It records battery condition, key parameters and safety at the time of testing, with a status that can be checked online. Buyers gain protection from expensive surprises while sellers receive credible evidence of vehicle condition. The same standard supports dealers, fleets, assessors, banks and insurers.
See the certification standardDiagnostics are valuable before buying a used EV because they verify the seller's claims and help estimate future costs. When selling, a report and certificate document battery condition and support the asking price. Regular measurements also help owners and fleets monitor degradation, plan maintenance, replacement or second-life use. The result reflects parameters read during the actual test, providing a much fuller picture than dashboard range, vehicle age or mileage alone.
We combine certified test protocols with data analytics to assess the true state of a battery and translate it into concrete market value.
Over 50 parameters - SOH, cell voltage balance, internal resistance, temperature and charge history - read directly from the BMS.
Our proprietary model converts cell health, degradation and market context into a single objective score and a residual value in PLN.
An independent, verifiable document confirming lifespan, safety and performance - recognised in sales, leasing and insurance.
The SOH and cycle sliders describe the same wear scenario and update each other. Capacity changes the scale of the value, not the ageing rate.
* illustrative result only, sources and test conditions Sandia (2020), Nature (2023)
Every battery follows the same precise route - eight stages that turn raw data into trust.
You submit your vehicle for verification. You pick a meeting time with our specialist that suits you.
Our technician comes to the address you provide at the chosen time. You don’t have to drive the car anywhere yourself.
The specialist connects a dedicated diagnostic device to the appropriate port in the vehicle. It is a completely safe, standard procedure for reading technical parameters.
Reading data directly from the battery management system (BMS) takes only 3 minutes. Raw operating parameters of the traction battery are collected.
The technical data goes straight into our dedicated application. The software automatically validates the readings against our procedures and safety standards.
The app computes the actual chemical wear of the cells and determines the vehicle’s real residual value - based on hard measurement data, not guesses about age or mileage.
The system instantly generates a digital battery-condition certificate, secured against tampering. It contains a clear summary of cell health and a forecast of value decline over the coming years.
The finished certificate carries evidential weight recognised by banks, insurers and courts across the European Union. Its verification status can also be linked to online listing portals.
A trustworthy battery assessment builds buyer confidence and speeds up used-EV sales.
Fleet-wide battery health monitoring, replacement planning and fewer costly downtimes.
An objective residual battery value for claims, policies and repair-or-replace decisions.
Accurate contract end-values and predictable depreciation for electric vehicles.
Confidence when buying or selling a used EV - no more guessing about battery condition.
Qualifying batteries for reuse or material recovery based on their real condition.
Book a diagnostic, ask about a partnership, or request a BHV demo for your fleet.