State of Health (SoH)

What is being tested?

The State of Health (SoH) describes the battery’s health compared to its original condition.
Using manufacturer-independent vehicle diagnostics, the battery is read directly via the battery management system. This allows, among other things:

• the actual remaining capacity
• the performance
• as well as the wear condition of the high-voltage battery

Determine precisely and practically.

Your advantages at a glance

✅ Full transparency regarding battery condition
You receive a clear, understandable statement about the actual health of the battery – independent of manufacturer specifications or on-board displays.

✅ Increased security when buying and selling electric vehicles
The SoH check creates trust between buyer and seller and reduces uncertainties with used vehicles.

✅ CARA-certified TÜV certificate
After successful testing, you will receive an official CARA certificate from TÜV, which documents the battery’s state of health (SoH) and serves as recognized proof in the vehicle trade.

✅ Improved marketing & value retention
A certified battery check increases the attractiveness of your vehicle, can reduce downtime, and helps you achieve a fair market price.

✅ Ideal for dealers, fleets & private customers
Whether for sale, purchase, lease return or inventory valuation – the SoH check provides a reliable basis for decision-making.

Why a battery SoH check is so important

The high-voltage battery is the most expensive component of an electric vehicle. Even minor differences in its condition can significantly impact the vehicle’s value. The CertifyCar Battery SoH Check makes this condition transparent, comparable, and verifiable – for maximum safety and planning security.