Battery Storage Installation, UK-Wide
Apex Doma installs, upgrades and maintains home battery storage systems across the UK, including Tesla Powerwall and Sigenergy SigenStor. Whether you are adding a battery to an existing solar setup or starting from scratch, we design each system around your household usage, tariff, and backup needs. We are NICEIC Approved Contractors and Which? Trusted Traders, with MCS and RECC accreditation.
Already have solar panels? A battery can usually be added by upgrading your inverter alone. If you are on the older Feed-in Tariff, we can install an AC-coupled system that protects your FIT payments while still giving you full battery storage benefits.
Battery Storage Installation
Available as a standalone solution or used to store self-generated energy from solar, battery storage will allow you to save money on your energy bills from month one by accessing cheaper night-time energy tariffs.
Get free advice from the experts
why battery storage?
01
Charge Up Your Battery
You can use self-generated solar energy, or charge at a cheaper rate from the grid during the night.
02
Use at Peak Times
This reduces your electricity bill by using the power that you’ve got stored, rather than the expensive electric from the grid.
03
Feed Into The Grid
Anything you don’t need, you can sell back to the grid. Schedule charging & discharging for maximum benefit.
working with market-leading manufacturers
There’s lots of battery storage solutions on the market, we only work with brands we would be happy to put in our own homes.
We are proud to be approved installers for both Tesla & GivEnergy, bringing you the best technology, warranties and aftercare service on the market.
Sigenergy SigenStor
The most flexible and scalable solution with bi-directional EV charging.
Pair with solar and recharge
The battery will be charged with your excess power during the day, storing all that energy that isn’t being used by your home. You can then use the battery to run your home during the evening or at night, using up that stored energy without taking anything from the grid. You can even discharge to the grid at peak times for financial incentives!
The best bit, it all happens automatically. Intelligent battery software uses algorithms to calculate when to store or discharge energy. This also works with solar, calculating when to use, store or sell the energy back to the grid for maximum cost savings.
Can I add a battery onto my existing system?
Of course! The only thing you might need to upgrade is your inverter.
If you have an existing system that benefits from the government’s old Feed In Tariff (FIT) scheme, then you can go on taking advantage of that, your FIT payment will stay the same because you’re paid for all of the energy you generate.
Protecting your Feed-In Tariff
To protect these profitable payments while also taking advantage of battery storage, we recommend having what we would call an AC-coupled system. We leave the existing system exactly as it is and put a second inverter in to manage the charging and discharging of the battery. By installing this way, maximum energy continues to pass through the FIT-registered meter, giving you the highest possible income from the scheme.
don't just take our word for it...
Why choose Apex Doma?
Our dedication to excellence is reflected in our NICEIC Approved Contractor and Which? Trusted Trader status, alongside our MCS & RECC registration, have earned a reputation as a reliable and trustworthy partner.
Engineer-led, no salespeople.
Big enough to have good infrastructure, slick processes and professional service.
In-house delivery, one team from start to finish.
Small enough to be family run.
Frequently asked questions
I already have a Solar PV system and only want battery storage system?
No problem! We can retrofit a battery storage system to your existing system. We may need to look at upgrading parts of your system, such as the inverter, or we can install an AC-coupled system which has its own inverter and operates independently. We will discuss all your options as part of our consultation process.
How much does a battery system cost?
We pride ourselves on building tailored systems to suit your specific needs and requirements, so it’s impossible for us to give accurate prices or “packages” online. But to give an indication of prices, we would recommend at least a £5,000 budget for a battery storage system.
As part of our commitment to transparency, we break down your full system in the quote, so you can see exactly where your money is going and provide you with options so you can make a well-informed decision.
Smaller batteries are available, e.g. a 2.5kWh from GivEnergy – but in most cases, these don’t work out as cost-effective as the installation costs are the same.
Where does the Battery get installed in my home?
A battery storage system is designed to be wall-mounted or ground-mounted. Both the GivEnergy batteries and Tesla Powerwalls can be installed outside or indoors.
At the quote stage, we will talk you through appropriate locations during the home survey, and then the engineers will confirm the location on the day before installation.
How does a battery work without solar?
Just as you can charge your car at night, when electricity is at its cheapest, you can charge your battery and use it during the evening when electricity is more expensive.
It works exactly the same as a solar-installed system; it’s just that it charges from the grid at night rather than from the sun during the day.
Do I have to pay VAT on battery storage?
The UK Government has taken a huge step towards sustainable energy by slashing the VAT on Battery Storage to 0%.
This is effective from the 1st of February 2024 and provides a significant financial advantage to both stand-alone energy storage systems and those added to existing solar PV systems.
How long does the battery installation take?
Battery installation is usually completed in one day; occasionally, we may need to return the following day to commission the system if software updates are required.
Will adding a battery affect my Feed In Tariff ?
If you want your Feed In Tariff to be unaffected, we recommend having an AC-coupled battery system.
We leave the existing Solar PV system exactly as it is and install a second inverter to manage the charging and discharging of the battery. This way, all the energy you generate passes through the FIT-registered meter before being stored in the battery, giving you the highest possible income from the scheme.
You’re not cheating the system, energy suppliers are perfectly happy with this and actively encourage it.
If I move house, can I take the battery with me?
Yes you can! We will come and give you a quote to safely uninstall your battery from your current system and re-install at your new property.
If you have solar, removing the battery element is a little more complex, but still possible. We would look to replace the inverter with a simple string inverter so you can take both your inverter and battery with you.
Solar Blogs & Insights
Solar Battery Storage: How It Works With Your Panels
Solar battery storage lets you store the electricity your solar panels generate during the day and use it later, in the evening, overnight, or whenever your panels are not producing enough on their own. Without a battery, any solar power you do not use immediately is exported to the grid, often at a lower rate than you pay to import electricity. Adding solar battery storage increases the proportion of your own solar generation that you actually use in your home, known as self-consumption, which is usually the single biggest factor in how quickly a solar and battery system pays for itself.
If you already have solar panels installed, battery storage can normally be retrofitted by upgrading your inverter or adding a compatible battery and AC-coupled inverter alongside your existing system, without needing to touch the panels themselves.
Home Battery Storage UK: Sizing, Cost and VAT
Home battery storage systems in the UK typically range from around 5kWh up to 16kWh or more of usable capacity, with the right size depending on your household electricity usage, your solar panel output if you have any, and whether you want enough backup capacity to ride out a grid outage. A smaller household on a time-of-use tariff might only need a battery to store cheap overnight electricity, while a larger household with solar panels may want enough capacity to cover an entire evening and morning of use from stored solar power alone.
Since 1 February 2024, home battery storage installed in Great Britain, whether alongside solar panels or as a standalone retrofit, qualifies for 0% VAT under HMRC VAT Notice 708/6. This relief is due to run until 31 March 2027. Apex Doma is a NICEIC Approved Contractor and Which? Trusted Trader, with MCS and RECC accreditation, so every home battery storage installation we design and fit meets the standards required for warranties, VAT relief, and any applicable export tariffs.
Home Battery Storage FAQs
What is solar battery storage?
Solar battery storage is a battery unit connected to your solar panel system that stores surplus electricity generated during the day so you can use it later instead of exporting it to the grid or drawing expensive electricity back from the grid after dark.
Do I need solar panels to get home battery storage?
No. Home battery storage can be installed as a standalone system, charging from the grid on a cheap overnight tariff and discharging when electricity is more expensive. It is also solar-ready, so panels can be added later if you decide to.
How much does home battery storage cost in the UK?
Cost depends on the battery brand, usable capacity, and whether it is installed alongside solar panels or as a standalone system. Get in touch with Apex Doma for a free, no-obligation quote based on your household usage and property.
Is there VAT relief on battery storage in the UK?
Yes. Since 1 February 2024, home battery storage installed in Great Britain qualifies for 0% VAT under HMRC VAT Notice 708/6, whether it is installed with solar panels or as a standalone system, and whether it is a new installation or added to an existing solar array. This relief is due to run until 31 March 2027.