Glossary

State of health (SoH)

Last updated 1 June 2026

State of health (SoH) is a measure of a battery’s current condition relative to its original specification, typically expressed as a percentage that reflects how much usable capacity or performance remains after ageing and use. Regulation (EU) 2023/1542 requires that data needed to determine state of health and expected lifetime be recorded and made available for LMT, industrial (above 2 kWh), and EV batteries, and this dynamic data forms part of the battery passport. Accurate SoH information is essential for safe repurposing and second-life decisions.

Related terms

Cookie preferences

You choose which cookies are used. You can change your choice at any time with “Cookie settings” in the footer. Privacy policy

Necessary

Always on

Needed for the site to work: your light/dark theme and this cookie choice are stored in your browser. They do not track you.

Analytics

Google Analytics 4 measures how pages are used through statistics, which helps us improve the site. If you accept, it sets cookies and measures your visit in full. If you decline, it sets no cookies, but Google may still receive technical data such as the page viewed, your browser type and IP address.

_ga, _ga_* · up to 2 years · Google