Changes to TRVB 121 O (2025) - Innovations for the PV fire protection plan
The new TRVB 121 O (2025) brings important changes for fire protection plansespecially for PV systems. Below is an overview of the changes compared to the 2015 version:
| Topic | TRVB 121 O (2015) | TRVB 121 O (2025) |
|---|---|---|
| Mandatory information in the PV fire protection plan | No specific PV requirements | Expected output (kWp), course of the PV cable, battery storage (kWh), voltage disconnector trigger, DC cable disconnector, inverter location, overview plan of the PV system |
| Regulation for plan changes | No concrete specification | For changes of more than 50% of the content: complete plan revision required |
| Symbols for PV systems | Not specified | Introduction of specific symbols (voltage cut-off switches, DC cables) |
| Battery storage | No special requirements | Extended documentation obligation for battery storage (kWh) |
| Planning Drawing Guideline | According to general TRVB symbols | New requirements in accordance with OVE guideline R11-1 |
When is a complete change of plan required?
A complete revision of the fire protection plan is necessary if more than 50% of the plan content is changed. This applies in particular to
- Extensive structural modifications
- Extensions to the PV system
- Modifications to safety-relevant equipment (e.g. battery storage, voltage disconnector)
The new requirements of TRVB 121 O (2025) require careful implementation. Keep your fire protection plans up to date to ensure legal safety and protection in the event of an emergency. If you have any questions or require advice, please contact us!
Thank you for your attention!