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The British Standards Institute (BSI) has recently released new recommendations regarding home battery installations, including those in loft spaces. One common inquiry we receive from our customers following the publication of the Publicly Available Specification (PAS) is whether a solar battery can be installed in a loft. The answer is a resounding yes, with some important details to consider.

The new PAS 63100:2024 is NOT a regulation 

The PAS 63100:2024, issued by the BSI in March 2024, outlines that solar batteries should not be installed in voids, roof spaces, or lofts. However, it is crucial to understand that this PAS is not a regulation but rather a best practice guide. It is designed for entities like local authorities and housing associations to develop specifications that align with their installer partners. Essentially, it serves as a rapid standardization tool that defines optimal practices for products, services, or processes.

Until the new PAS is officially adopted as a British Standard, it remains a recommendation. It is anticipated that the document will undergo revisions based on industry feedback over time.

The new PAS 63100:2024 may be subject to change 

It is worth noting that the PAS 63100:2024 recommendation will likely be subject to amendments from feedback from the solar industry over time. 

For example:

  • The document may not take into account newer, safer battery technology 
  • Fire ratings, or mounting options of products may not be taken into consideration 

What the new regulations say

In accordance with official regulations, as long as certain considerations are met – such as having a fire alarm, smoke alarm, adequate lighting, and accessible entry points – solar batteries can indeed be installed in lofts. For comprehensive details, refer to Section 11, Table 11.1 of the IET Code of Practice, Electrical Energy Storage Systems, 2nd Edition.

It is important to note that regulations always take precedence over recommendations like the new PAS from the BSI. Stay informed and compliant to ensure safe and efficient solar battery installations.

GivEnergy Inverter and Battery
GivEnergy Inverter and Battery Installation in a Loft Space

What the MCS say

The standards body of the UK renewable energy industry, the MCS, is due to discuss the PAS 63100:2024, issued by the BSI in a meeting in July 2024.

TL;DR in terms of installation advice 

Can solar batteries be installed in a loft?

Yes, solar batteries can be installed in lofts as long as appropriate siting, lifting, access, and regulations are taken into consideration to ensure safety and that historic installations are not affected.

It is important to note that this type of installation may not align with the current PAS best practice guidelines. If left unamended, this standard may be adopted by home-builders and others for new installations.

Therefore, it may be advisable to explore alternate locations for siting solar batteries in future projects.


This is a fast-moving process. We will keep you updated should there be any changes.  


We recommend that all solar batteries, inverters, etc. must be installed by an accredited MCS Installer like NXTGEN Energy.

FAQ: Solar Battery Installation in Lofts

Can I install solar batteries in my loft?

Yes, according to current regulations, you can install solar batteries in your loft as long as you meet specific safety requirements. These include having a fire alarm, smoke alarm, proper lighting, and an easily accessible entrance. For full details, refer to Section 11, Table 11.1 of the IET Code of Practice, Electrical Energy Storage Systems, 2nd Edition.

What are the new recommendations about lofts?

The British Standards Institute (BSI) recently issued a recommendation (PAS 63100:2024) discouraging loft installations. It’s important to note that this is not a regulation yet, but rather a best practice guide. The solar industry is expected to provide feedback, and the recommendation may be revised.

Why might the loft recommendation change?

The current recommendation might not consider
– Newer, safer battery technology
– Fire safety ratings of specific battery units
– Mounting options for various battery systems

So, should I avoid a loft installation altogether?

Not necessarily. Regulations currently allow loft installations if safety precautions are met. However, if the PAS becomes a standard, future installations might not be allowed in lofts. It’s advisable to discuss alternative locations with your solar installer.

Who can install my solar batteries?

We recommend using an accredited MCS installer like NXTGEN Energy to ensure a safe and compliant installation.

Where can I stay informed about updates?

This is a developing situation. We recommend checking back for updates on any changes to regulations or best practices.

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