State of Health, proven on paper
How much battery is really left? Our certified State-of-Health test measures true usable capacity and degradation, giving you a document you can trust — and trade on.
State of Health, or SoH, is the single most important number in the EV world — and the one most surrounded by uncertainty. It expresses how much of the battery's original capacity remains, and it directly determines your range, your performance and a huge slice of your vehicle's value. Yet most owners are flying blind, relying on a rough dashboard estimate that manufacturers deliberately keep conservative and opaque. Our certified SoH test replaces that guesswork with a measured, defensible figure.
To measure SoH properly we do far more than read a screen. We assess the pack under controlled conditions, analyse the battery management system's capacity calibration, evaluate cell balance and internal resistance, and cross-reference the results against the known behaviour of your specific battery chemistry and model. The output is a precise percentage of original capacity, an estimate of real usable range today, and a degradation profile that shows how your pack compares to a healthy example of the same age and mileage.
Who needs a certified report
- Buyers who want proof before paying for a used EV
- Sellers who want to command a fair price with evidence
- Owners tracking degradation across years of ownership
- Fleet managers benchmarking vehicles before resale or rotation
- Anyone disputing a range or warranty claim with a manufacturer
Buy and sell with confidence
Nothing protects an EV transaction like an independent SoH certificate. For buyers, it is the only reliable way to know whether that tempting used listing has a strong pack or a tired one hiding behind a flattering odometer. For sellers, a healthy certified figure is powerful proof that justifies your asking price and shortens negotiations. Because our report is independent and certified, both sides can trust it — we have no car to sell you and no reason to shade the number in anyone's favour.
Track degradation over time
Battery degradation is not linear, and small changes in how you charge and drive can meaningfully alter its trajectory. Many of our clients return annually for a fresh SoH test, building a documented history that both protects resale value and flags any unusual decline early enough to act on. If your pack is degrading faster than it should, that is exactly the kind of evidence a warranty claim needs — and we will help you present it.
Stop guessing about the most expensive part of your car. Order a certified State-of-Health report and finally know, on paper, exactly what your battery has left.
Battery Health & SoH Testing questions
The dashboard shows a conservative, smoothed estimate. We measure actual capacity and cell behaviour with manufacturer-grade tools and benchmark it against your specific model, producing a precise, certified figure.
Our certified reports are independent and data-backed, and are widely accepted as evidence in private sales, dealer trade-ins and warranty discussions.
It helps if the vehicle arrives with a reasonable charge, but it is not essential. We will advise on the ideal state of charge when you book.
Let's read your EV the right way
Honest, data-backed diagnostics and precise repairs from a high-voltage certified team — book with The EV Tech Center today.