What does a battery need for safety and permits?
The annual inspection. The fire service's officer walks around the container with the operator, checks the distances, the detection and the access.
The manufacturer's safety documentation lies on the table.
The questionWhat makes a battery container safe, and who checks it?
| What it tests | |
|---|---|
| Thermal shock and cyclingsudden temperature changes | integrity |
| External short circuitoutside the battery | protection |
| Overchargetoo much energy in | protection |
| Over-dischargetoo much energy out | protection |
| Over-temperaturetoo hot | protection |
| Thermal propagationfault spreading | protection |
| Mechanical damageexternal forces | integrity |
| Internal short circuitinside a cell | behaviour |
| Thermal abuseextreme heat | behaviour |
| Fire testexposure to fire | behaviour |
An eleventh parameter, the emission of gases, applies across all ten tests. The parameters apply as far as the hazard exists for the system in question; manufacturers must also assess and mitigate hazards not listed.
Safe by documentation
Stationary battery energy storage systems must be safe during normal operation and use. Their technical documentation must show successful tests for the safety parameters of Annex V, assess other possible hazards, show that those were mitigated, and include instructions for the case that a hazard occurs, such as a fire or explosion. On site, the building and fire rules of the Member State can add requirements; here, the fire service checks distances, detection and access.
Passport and second life
- : from 18 February 2027, every industrial battery above 2 kWh, every EV battery and every battery for light means of transport placed on the market needs an electronic record with information on the model and the individual battery.
- : EU law defines repurposing as using a battery, or parts of it, for a purpose other than the one it was designed for, such as a former car battery in a stationary system. Its safety documentation must then be reviewed.
Check your understanding
3 questions. Answer all of them to complete this stop. Each answer explains itself.
Which test checks whether a fault in one cell spreads to others?
Thermal propagation protection evaluates whether a thermal event spreads through the battery.
From when do industrial batteries above 2 kWh need a battery passport?
Article 77 of the Batteries Regulation: from 18 February 2027.
A former car battery is used in a stationary system. What does EU law call that?
Repurposing means using a battery for a purpose other than the one it was designed for.
- Battery passport An electronic record required from 18 February 2027 for EV batteries, batteries for light means of transport and industrial batteries above 2 kWh, with information on the model and the individual battery. Glossary
- Repurposing Using a battery, or parts of it, for a purpose other than the one it was designed for, such as a car battery in a stationary system. Glossary
- EUR-Lex: Regulation (EU) 2023/1542 on batteries, Articles 3, 12, 14 and 77 and Annex V. https://eur-lex.europa.eu/eli/reg/2023/1542/oj. Checked 09 Oct 2026. © European Union, reused under Commission Decision 2011/833/EU.
- EUR-Lex: Regulation (EU) 2023/1542 on batteries, Articles 3, 12, 14 and 77 and Annex V. https://eur-lex.europa.eu/eli/reg/2023/1542/oj. Checked 09 Oct 2026. © European Union, reused under Commission Decision 2011/833/EU.
- EUR-Lex: Regulation (EU) 2023/1542 on batteries, Articles 3, 12, 14 and 77 and Annex V. https://eur-lex.europa.eu/eli/reg/2023/1542/oj. Checked 09 Oct 2026. © European Union, reused under Commission Decision 2011/833/EU.
- EUR-Lex: Regulation (EU) 2023/1542 on batteries, Articles 3, 12, 14 and 77 and Annex V. https://eur-lex.europa.eu/eli/reg/2023/1542/oj. Checked 09 Oct 2026. © European Union, reused under Commission Decision 2011/833/EU.
- EUR-Lex: Regulation (EU) 2023/1542 on batteries, Articles 3, 12, 14 and 77 and Annex V. https://eur-lex.europa.eu/eli/reg/2023/1542/oj. Checked 09 Oct 2026. © European Union, reused under Commission Decision 2011/833/EU.