It is particularly useful for used EV buyers, sellers, and dealers who want fast and independent insight into a battery's condition without a long test drive.
Here’s what it means and includes:
🔍 What is the AVILOO FLASH Test?
The FLASH Test is a quick, automated battery diagnostic performed by connecting the AVILOO Box to a vehicle's OBD-II port. It evaluates:
Battery usage history
Cell voltage balance
Temperature readings
Battery management system (BMS) data
Vehicle communication quality
It doesn't require a full discharge or charge, making it ideal for use on forecourts or before a sale.
🧾 What does the certificate show?
The following is an example of a certificate for a Renault Zoe (40 kWh)
Here's a summary of what it found;
Section | Result |
AVILOO Score | 92 / 100 – Very good battery condition |
Charging & Driving Behavior | 65 / 70 – Indicates sensible use |
Battery Performance | 27 / 30 – Cells are well balanced |
BMS & Communication Checks | ✔ Passed all internal checks |
State of Charge (SoC) | 16.32% at time of test |
Manufacturer-reported SoH | 88% (read from the car, not calculated by AVILOO) |
Max cell voltage deviation | 10 mV – Low deviation = good health |
Max cell temperature deviation | 1°C – Uniform temperature = good behavior |
The test was completed successfully, and no safety issues or red flags were identified.
✅ What does a high AVILOO Score mean?
A high score (like 92) means:
The battery has no significant degradation or defects.
Cell voltages are well balanced.
No unusual charging/discharging behaviour was detected.
Likely to still offer good range and performance.
⚠️ How is it different from the manufacturer’s SoH?
The SoH from the manufacturer is calculated by the BMS and can sometimes be misleading, as shown in the following case study.
The AVILOO flash test offers deeper validation, often catching hidden defects like cell faults even when the manufacturer SoH appears normal.
If you’re buying or selling an EV, this certificate gives independent verification of battery health — the most critical and expensive part of an electric car.