5 Popular Solar Battery Storage Systems in the UK: 2026 Guide
Are you tired of watching your hard-earned money disappear into energy bills? You’re not alone. UK homeowners are looking for better ways to manage their energy, and solar battery storage is one of the most popular options. If you already have solar panels, or are thinking about installing them, a battery can help you use more of the power you generate rather than exporting it cheaply, which can save you more money over time. But with so many options available, how do you know which one to choose?
In this 2026 guide, we look at five well-known solar battery storage systems available in the UK, what makes each one stand out and what to check before you buy. It’s written by the team at LODEAL by REST UK, an MCS-certified installer that designs and fits solar and battery systems across England and Wales. We install Duracell, Tesla Powerwall, Fox ESS and Growatt batteries, but the advice below applies whichever brand you choose. Let’s dive in.
Table of Contents
- Why Solar Battery Storage Is a Smart Choice
- 5 Popular Solar Battery Storage Systems in the UK
- How to Choose the Right Solar Battery
Why Solar Battery Storage Is a Smart Choice
Solar battery storage isn’t just a luxury any more. It’s becoming a common part of home energy systems. With energy costs still high and a growing focus on sustainability, homeowners across the UK are looking for ways to cut their electricity bills and reduce their carbon footprint. A solar battery lets you store excess energy generated by your panels during the day, so you can use it in the evening, when the sun isn’t shining (hello, cloudy British weather!) or when electricity rates are higher.
| Benefit | Description |
|---|---|
| Energy Independence | Store excess solar energy to use during non-sunny periods or at night, reducing your reliance on the grid. |
| Cost Savings | Use stored energy during peak hours when electricity prices are higher, which can lower your bills over time. |
| Environmental Impact | Lower your carbon footprint by relying more on renewable energy and less on fossil fuels. |
| Backup Power | Some solar battery systems can provide backup power during grid outages, if set up with the right equipment. |
Thinking About a Solar Battery?
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5 Popular Solar Battery Storage Systems in the UK
1. Tesla Powerwall
Tesla’s Powerwall is one of the best-known home batteries in the world. The Powerwall 2 set the benchmark for years with a usable capacity of 13.5 kWh, which can cover much of a typical UK home’s daily electricity use, depending on your habits. The newer Powerwall 3 keeps the same 13.5 kWh usable capacity and adds a built-in solar inverter. Both are monitored and controlled through the Tesla app, which lets you see your energy use in real time. We’re a Tesla Certified Installer, so this is one of the batteries we fit.
| Feature | Details |
|---|---|
| Storage Capacity | 13.5 kWh |
| Warranty | 10 Years |
| Dimensions | 1150 mm x 753 mm x 147 mm |
| Weight | 114 kg |
| Operating Temperature | -20°C to 50°C |
| App Integration | Tesla App |
2. LG Chem RESU
LG (now LG Energy Solution) has been a big name in home batteries, and its RESU series was designed for good capacity and long-lasting performance. The RESU 10H has a usable capacity of around 9.8 kWh, which can suit medium-sized homes. Its compact size helps it fit into smaller spaces. Model availability changes over time, so check which versions are currently supplied in the UK.
| Feature | LG Chem RESU | Tesla Powerwall 2 |
|---|---|---|
| Storage Capacity | 9.8 kWh | 13.5 kWh |
| Warranty | 10 Years | 10 Years |
| Dimensions | 744 mm x 907 mm x 206 mm | 1150 mm x 753 mm x 147 mm |
| Weight | 97 kg | 114 kg |
| Operating Temperature | -10°C to 45°C | -20°C to 50°C |
3. SonnenBatterie
Hailing from Germany, sonnen is a well-established name in energy storage. Its sonnenBatterie range offers around 10 kWh of storage in popular configurations and is known for its durability. In some markets, sonnen also runs a community scheme where users can share excess power with others.
4. Powervault
Designed in the UK, Powervault has appealed to homeowners who like to support British companies. Its modular designs have offered capacities from roughly 4 kWh to 20 kWh, so the system can be sized to a home’s energy needs. As with any brand, check current availability, warranty terms and after-sales support before you commit.
5. Duracell Energy
Duracell Energy’s home battery systems pair Duracell-branded battery storage with a hybrid inverter and app monitoring. The batteries are modular, so capacity can be matched to a smaller home or scaled up for larger households with higher energy use. We’re a Duracell Energy Platinum Partner, and we also install Fox ESS and Growatt batteries, which are popular choices for flexible, good-value storage.
How to Choose the Right Solar Battery
- Size it to your usage: look at how much electricity you use in the evening and overnight, not just your total annual use. A battery that’s too big may never fill up; one that’s too small won’t cover your evening demand.
- Check the inverter setup: some batteries need a separate inverter, while others (such as hybrid or all-in-one systems) include one. Retrofitting a battery to existing panels can be done with an AC-coupled system.
- Look at warranty and cycles: most quality batteries carry a 10-year warranty. Check the guaranteed capacity at the end of the warranty, too.
- Think about tariffs: a battery can also charge from the grid on a cheaper off-peak or time-of-use tariff, which can add to your savings.
- Use an accredited installer: an MCS-certified installer is normally needed for Smart Export Guarantee payments, and RECC membership gives you consumer protection.
- Get more than one quote if you like: it’s sensible to check the specification and warranty of any quote carefully, not just the price.
Thinking about adding battery storage? LODEAL by REST UK is an MCS-certified installer with more than 10,000 installations across England and Wales. Get a free, no-obligation quote or call 03305 202053 to talk through the right battery for your home.
FAQs
As an indicative guide, a home solar battery in the UK typically costs from around £4,000 to £12,000 installed, depending on capacity, brand and whether you need a new inverter. The final cost depends on a survey of your home. Qualifying battery installations are currently zero-rated for VAT.
Most solar batteries come with a 10-year warranty, and many can last 10 to 15 years or more, depending on how heavily they are used and the battery chemistry.
For many homes, yes. A battery lets you use more of the solar energy you generate instead of exporting it, which can reduce your reliance on the grid and lower your bills. Whether it pays off for you depends on your usage, your tariff and the size of your solar system.
Some can. Certain batteries, such as the Tesla Powerwall, can provide backup power during an outage when installed with the right equipment. Not every system does this as standard, so check before you buy.
It varies from home to home. Savings depend on how much solar you generate, when you use electricity, your tariff and the battery size. Many households can save a meaningful amount each year, and your quote should include an estimate based on your own home.
