In March 2024, the British Standards Institution (BSI) introduced the PAS 63100:2024 document, a set of guidelines for enhancing the safety of Battery Energy Storage Systems (BESS) in residential properties. These guidelines are becoming increasingly relevant as more households adopt solar energy solutions with battery storage. Below is an overview of what homeowners should be aware of when considering or managing a BESS installation.
1. Installation Restrictions
One of the central recommendations in PAS 63100 is related to where batteries can be installed. For safety reasons, it’s advised to avoid installing batteries in high-risk areas like lofts, voids, or roof spaces. This stems from concerns about fire safety and the difficulty of accessing these spaces in emergencies. Instead, batteries should ideally be located outdoors or in areas with adequate fire separation from habitable rooms and escape routes.
2. Fire Safety Measures
PAS 63100 emphasizes the need for enhanced fire safety measures:
- Ventilation: Ensuring proper airflow to manage heat buildup or off-gassing from malfunctioning batteries.
- Fire Detection: Installing smoke and fire alarms near the battery system, particularly in locations that aren’t frequently accessed, such as under stairs or lofts. The alarms should be linked to the main fire detection system of the house to ensure early warning.
Additionally, batteries should not be placed near materials that can fuel a fire, such as within 2 meters of flammable items or fuel storage areas.
3. Energy Storage Capacity Limits
The standard also sets limits on the total energy storage capacity for residential BESS:
- 80 kWh in outbuildings or garages that have adequate fire separation.
- 40 kWh in other indoor locations, such as basements or storage rooms.
Exceeding these limits could pose additional fire risks, and it’s important for homeowners to assess their energy needs accordingly.
4. Safety of Existing Installations
The PAS 63100 guidelines are not retroactive, meaning that if you already have a battery storage system installed before March 2024, you are not required to make changes to comply. However, it is advisable to review the recommendations and consider enhancing your system’s safety. For example, adding fire detection systems or ensuring proper ventilation could significantly reduce risks.
5. Home Insurance and Future Regulations
Although the PAS 63100 is currently a set of recommendations, compliance may become necessary in the future if local authorities or insurers require it. Homeowners should stay updated on evolving regulations and make sure their systems meet safety standards to avoid future issues with insurance claims or regulatory fines.
6. Ongoing Technological Advancements
Battery technology continues to evolve, and PAS 63100 is seen as a starting point for further refinement. As newer, safer battery systems become available, homeowners should keep an eye out for updates to these guidelines. Ensuring that your BESS uses the most recent technology can help reduce fire risks and improve overall system efficiency.
Conclusion
While PAS 63100:2024 is a voluntary set of guidelines, following these recommendations can greatly improve the safety of your home’s battery storage system, and help to reduce any issues arising in the future from non-compliances.
From selecting the proper installation location to ensuring appropriate fire safety measures, adhering to these guidelines can help homeowners avoid potential risks and future-proof their energy storage solutions.
If you’re considering installing a battery energy storage system or already have one, make sure you familiarise yourself with the PAS 63100 document and consult with a professional installer to ensure your system meets the best safety practices.
