Q&A
About Bib
A device can indeed be more precise locally — on a single vehicle, at a specific point in time. But the real question is not:
“What is the maximum precision on one vehicle?”
The real question is:
“How do you build a trusted infrastructure across 100,000 vehicles, integrated into digital workflows, without heavy logistics?”
Structural limitations of physical devices:
- Cost: ~€35 per diagnostic vs ~€10 for Bib. On a fleet of 10,000 vehicles, that’s a €250,000 difference.
- Logistics & Scalability: Each diagnostic requires an appointment, a technician, and vehicle immobilization. Across a multi-site fleet, this becomes a logistical project.
- Integration: A device produces a one-off report, not a signal consumable in real time by a pricing or underwriting engine.
- Monitoring: A device provides a snapshot at time T. Bib provides longitudinal tracking (degradation trajectory).
In summary:
A device is a unit-level diagnostic tool. Bib is signal infrastructure at scale. They solve different problems. And in cases where an additional physical measurement is required (premium certification, audit), Bib can integrate with field measurements.
Bib produces three types of battery reports: Flash, Standard, and Premium.
- The Flash Report is available for 100% of EVs, regardless of brand or model.
- For Standard and Premium reports, eligibility varies by vehicle, as not all manufacturers share their data. Check our eligibility documentation for more details.
Bib produces three types of battery reports: Flash, Standard, and Premium.
Bib does not rely exclusively on OEM data.
The architecture is designed in three layers:
- OEM cloud data (when available): the richest source, feeding Standard and Premium Reports.
- Driving and charging data (collected via telematics partners): enabling independent SoH calculation.
- Flash Report (always available): based on statistical data from the Bib fleet (age, mileage, model, degradation patterns observed on comparable vehicles). Flash SoH guarantees a response for 100% of requests, with an explicit confidence level (~±5%). This fallback is a contractual promise: no request remains unanswered. No workflow is blocked.
The two figures do not measure the same thing.
OEM SoH is calculated by the manufacturer using its proprietary method, often based on gross capacity (including a protective buffer).
Bib SoH is calculated independently, based on net capacity (energy actually usable by the driver), and standardized across OEMs.
Why this matters:
An OEM SoH can remain high while available energy declines — the buffer absorbs degradation.
Thus, a 90% OEM SoH at Kia does not mean the same thing as a 90% OEM SoH at Renault. Methods differ, buffers differ, reference baselines differ.
Bib SoH is designed to be comparable across brands. That is its core purpose.
The observed gap (typically 5 to 15 points) is not an error. It is the result of rigorous standardization. And that gap is precisely where the value lies: without it, comparing two vehicles from different brands on battery health would be impossible.
No — and that is a deliberate choice.
Bib produces certifiable data: standardized, timestamped, traceable, documented, and robust enough to withstand audit. It is the material of certification.
The certification itself — meaning the formal validation that a process complies with a recognized standard — is delivered by accredited third parties.
This separation is strategic: It guarantees Bib’s neutrality: we are not judge and party.
- It strengthens the credibility of the signal: an SoH certified by a third party carries more weight than a self-certified SoH.
- It enables flexibility: different markets or regulators may recognize different certifiers, without requiring Bib to modify its infrastructure.
Bib is an information infrastructure, not an investment advisor.
SoH is a standardized signal, delivered with an explicit confidence interval and full traceability. The governance framework is designed so that clients can integrate the signal into their internal policies in an audit-ready manner:
- Traceability: Every result is timestamped; sources are documented; methodology is auditable.
- Explicit uncertainty: Clients know exactly the confidence level of each result. A decision based on Flash Report (±5%) does not carry the same weight as one based on Premium Report (maximum precision).
- Contractual documentation: Terms of use clearly define what Bib provides (a signal) and what the client does with it (a decision).
- No performance guarantee: Bib does not promise that the residual value will be correct. Bib promises that the measurement is the best available, standardized, and auditable.
In practice, responsibility works the same way as with credit rating agencies or market data providers: They provide information. The decision-maker bears the decision.
Want to go deeper on EV batteries?
State of Health (SoH) is a percentage that represents your EV battery's current capacity (in kWh) compared to when it was new. SoH naturally degrades over time, which directly impacts driving range, charging performance and vehicle resale value.
Battery range refers to the maximum distance an electric vehicle can travel on a single full charge, expressed in kilometers (km).
It is not a fixed value: range depends on driving behavior, speed, temperature, vehicle load, and … SoH - because it always matters. Accurate knowledge of an EV’s range is critical for benchmarking before a purchase, trip planning, resale valuation and battery health monitoring.
Read more about battery range
Battery health (SoH) measures how much of the battery's original capacity remains over time. It's a percentage that degrades with age and charge cycles. Range is how far the car can travel on a single charge, in kilometers. Range depends on battery health but also on driving style, temperature, speed, and other real-time factors.
EV range depends on external driving conditions while battery health (SoH) reflects the actual physical capacity of your battery. This means you can experience a significant loss of range in winter without any permanent loss of battery health, since cold temperatures only temporarily reduce performance.
Battery health (SoH) is generally categorized as follows:
- 100-95% is considered excellent
- 95-80% reflects normal wear
- Below 80% indicates significant degradation.
While thresholds vary by manufacturer and battery chemistry, 70–80% SoH is widely recognized across the industry as the end of "first life", ie. the point at which a battery may become eligible for warranty replacement or second-life applications.
A battery buffer is the portion of an EV battery's gross capacity that is intentionally kept in reserve and never shown to the driver. When your State of Charge (SoC) display reads 0%, the buffer is still available.
It exists to protect the battery from deep discharge damage, preserve long-term State of Health (SoH), and keep critical vehicle systems running. This is why a battery's usable (net) capacity is always slightly lower than its gross capacity.
Read more about battery buffer.
For daily use, it is better to charge up to 80%.
Keeping the battery at a high state of charge for extended periods accelerates electrochemical stress. Charging to 100% occasionally is perfectly fine - for example, the evening before a long trip - but doing it as a routine habit will accelerate degradation over time.
Frequent DC fast charging can accelerate degradation because it generates more heat and increases internal resistance compared to AC charging. That said, occasional use is perfectly fine and will not cause significant harm.
If you have the option, using a home AC charger for daily charging and reserving fast chargers for road trips is the best approach for long-term battery health.
Read more about fast charging & SoH
The ideal routine is to keep your battery between 20% and 80% for everyday use, avoid frequent full charges to 100%, limit the use of DC fast chargers, and use AC charging whenever possible. If your car supports it, setting a charge limit directly in the vehicle settings makes this easy to maintain without thinking about it.
No, because modern EVs manage charging intelligently and will stop drawing power once the set charge limit is reached. However, it is best to avoid leaving the battery sitting at 100% for extended periods, and to avoid extreme temperatures while plugged in, as heat combined with a full charge is particularly hard on battery chemistry.
Cold temperatures temporarily reduce performance, resulting in lower range and slower charging speeds. This is because lithium-ion batteries operate less efficiently at low temperatures. In most cases, however, cold weather does not cause permanent damage: once the battery warms up, performance returns to normal.
The chemistry is temporarily slowed down, not damaged.
Yes, heat is one of the main enemies of EV battery health. High temperatures - whether from hot weather, fast charging, or intensive use - accelerate the degradation of lithium-ion cells and reduce long-term State of Health (SoH). Parking in direct sunlight, frequent DC fast charging in summer, and storing a battery at high SoC in heat all contribute to faster capacity loss.
Most EVs include a thermal management system to limit damage, but sustained exposure to heat will still shorten your battery's lifespan and reduce your EV battery range over time.
The battery can represent up to 40% of the vehicle's value. Poor battery health means reduced range, lower resale value, and potentially expensive replacement costs down the line. Knowing the SoH before purchasing gives you a clear picture of what you are actually buying and helps you avoid unpleasant surprises.
Besides, knowing a used EV's State of Health (SoH) is essential to assess whether the asking price is fair.
On average, across the most common EV models, each percentage point of SoH represents approximately 1% of the new vehicle price. As a rule of thumb, a car at 90% SoH should not be sold for more than 90% of its original new price.
The most impactful thing you can do is provide documented proof of your battery's State of Health (SoH). Buyers are increasingly aware that EV battery health directly affects range, performance, and long-term value, and a certified SoH report removes the uncertainty that causes hesitation or lowball offers.
Beyond that, keeping a full service history, maintaining the battery between 20% and 80% State of Charge during daily use, and avoiding excessive fast charging all help preserve battery health over time.
The "80% rule" refers to two things:
(1) The common recommendation to charge only up to 80% daily to preserve battery longevity;
(2) The industry benchmark for end of battery "first life": a battery below 80% SoH is generally considered degraded and may be eligible for warranty replacement or second-life use.
Most manufacturers guarantee at least 70% SoH over 8 years or around 160,000 km, depending on which threshold is reached first.
This varies by brand, as some premium manufacturers offer higher thresholds or longer coverage.
If your battery drops below the guaranteed threshold within the warranty period, you are entitled to a repair or replacement. Which is why having a certified SoH measurement can be valuable for warranty claims!
You should investigate if your SoH drops below 80% earlier than expected, if your range drops significantly without a clear external explanation, or if charging becomes inconsistent or unpredictable. In these cases, a professional battery health test is the right next step to determine whether the issue is a calibration problem or actual capacity loss.