Thinking about adding battery storage to your home solar system? You’re not alone. With rising energy bills, growing interest in renewables, and the UK’s push toward net zero, battery storage is fast becoming a go-to solution for homeowners who want more control over their energy.
If you already have solar panels — or plan to get them — a battery allows you to store excess energy and use it when it suits you best, like in the evenings or even possibly during power cuts. But how is it actually installed? And what should you expect from the process?
Here’s what a typical UK battery installation involves in 2025 — step by step.
First, a Quick Note: Every Installation Is Unique
Before we get into the nuts and bolts, it’s worth saying — no two installations are exactly the same.
Whether you’re adding a battery to an existing solar PV system (retrofit) or installing it alongside a brand-new solar array, the setup, wiring, location, and paperwork can vary slightly.
This guide gives a solid overview of how it typically works — but your installer will tailor things to suit your home, system size, and energy goals.
How Is Battery Storage Installed in the UK?
Installing battery storage isn’t as simple as plugging it in. There are important safety and technical steps involved—especially with newer standards introduced in 2024.
1. Initial Assessment
A certified installer will assess your home’s energy use, solar panel output (if you have panels), and your daily habits to recommend the right size and type of battery.
They’ll look at:
- How much electricity you use and when.
- The size and generation capacity of your solar panels.
- Your goals: bill savings, backup power, or energy independence.
- Where the battery can optimally be installed to follow regulations and guidance.
2. Choosing the Right Battery
Most home systems in the UK range between 5kWh and 15kWh. You can choose between:
- AC-coupled systems – Easier to add to existing solar panel systems.
- DC-coupled systems – More efficient, but usually installed alongside new solar.
Popular brands in the UK include Growatt, Tesla Powerwall, GivEnergy, Enphase and Fox.
3. Finding the Right Location
Under the new PAS 63100:2024 fire safety guidance, batteries must be installed in safe, ventilated locations. This means not in lofts, bedrooms, stairwells, or small cupboards.
Best spots include:
- Utility rooms
- Garages
- Purpose-built external units
Fire Ratings & Mounting Safety
Under PAS 63100:2024 fire safety guidance, battery systems must meet fire classification standards and be mounted on certified, fire-resistant surfaces. Your installer must also ensure there's sufficient ventilation to prevent overheating. Make sure the mounting surface has been assessed and approved for the system’s weight and fire risk.
4. Professional Installation
Installation must be done by a qualified electrician who understands UK standards and safety requirements.
They’ll:
- Install the battery on a fire-safe mounting point.
- Connect it to your solar system and/or grid.
- Ensure correct ventilation and safety features.
- Test the system thoroughly.
Electrical Integration & Safety Features
As part of the installation, your electrician will ensure the battery is correctly wired into your home’s electrical system. This includes fitting appropriate circuit protection (such as MCBs and RCDs) and isolation switches, which allow the system to be safely shut off for maintenance or in the event of an emergency.
All components must comply with UK wiring regulations (BS 7671), and your installer should clearly label the system to ensure safety for future work or inspections.
Pro tip: Choose an installer who is MCS-certified and familiar with PAS 63100 standards.
5. Paperwork, Approvals & Grid Notification
Most domestic battery installs fall under permitted development. You usually won’t need planning permission unless you live in a listed building or conservation area — but some admin is still essential.
What happens:
- Your installer notifies your Distribution Network Operator (DNO)
- You’ll receive an Electrical Installation Certificate (EIC)
- You may need to inform your home insurer
- DNO approval paperwork will confirm that your system is grid-compliant
Tip: Always choose an MCS-certified installer who knows how to handle this process smoothly.
6. Final Checks & Monitoring
Once your battery is installed, most systems come with a user-friendly app or online portal where you can:
- See how much energy you're storing and using
- Monitor your battery’s state of charge
- Review your daily/weekly savings
But your installer should go a step further — giving you a basic understanding of:
- How to read your battery’s state of charge and daily usage trends
- Tell you what to expect in terms of performance and degradation over time
- Routine maintenance tips, such as explain how to maintain safe airflow and check battery status
- Offer a warranty and maintenance plan
Final Handover: What You Should Receive
Once your battery system is up and running, make sure you receive:
- Electrical Installation Certificate
- DNO notification paperwork
- Warranty and performance documents
- App login or monitoring dashboard
- Optional: basic training or user guide
Final Thought: Your Energy, On Your Terms
Battery storage is more than just a technical upgrade — it’s a step toward smarter, more independent energy living. Whether you’re adding it to an existing solar system or planning a new one from scratch, the right setup can reduce your bills, cut your reliance on the grid, and give you peace of mind in case of outages.
Ready to take the next step? Register your interest for the Solar Together scheme and see how battery storage could work in your home.
Battery Storage Installation FAQ
Can solar batteries be installed outside in the UK?
Yes, solar batteries can be installed outside in the UK — provided they're placed in a weatherproof, ventilated, and secure enclosure. Under PAS 63100:2024 fire safety standards, external units must be purpose-built and mounted on certified fire-resistant surfaces. Your installer will ensure it meets all safety and performance criteria for outdoor use.
Can I install a solar battery myself?
No — installing a solar battery is not a DIY job. It must be done by a qualified electrician who understands UK wiring regulations (BS 7671) and the new PAS 63100 fire safety standards. Incorrect installation can be dangerous and may void your insurance or warranty.
Can solar batteries be installed in a loft?
No — as of 2024, lofts are no longer considered ideal for battery storage under updated UK fire safety guidance (PAS 63100:2024). Batteries should now be installed in well-ventilated, fire-safe areas such as garages, utility rooms, or purpose-built outdoor units. Avoid placing them in bedrooms, stairwells, or small cupboards.
However, if you already have a battery installed in a loft, don’t worry — this new guidance applies to new installations only. You don’t need to move it unless your installer advises otherwise for safety or compliance reasons.
Where is the best place to install a home battery system?
Ideal locations include:
- A garage
- A utility room
- A dedicated external enclosure
These spaces meet ventilation and fire safety requirements and allow easier access for maintenance.
Do I need planning permission to install a solar battery in the UK?
Usually not. Most domestic battery installations fall under permitted development rights. However, if you live in a listed building or conservation area, your installer should check local regulations. Regardless, your DNO (Distribution Network Operator) still needs to be notified.
How long does installation take?
Most domestic battery systems can be installed in 1–2 days, depending on system size and electrical setup. This includes physical mounting, electrical connection, DNO paperwork, and final handover.