Best Solar Battery Storage UK: Expert Picks (April 2025)

Adding a battery to your solar panel system increases the benefits you receive in terms of costs and self-sufficiency. With a battery, you will get more use out of your solar setup and can add to your total savings, making the investment an even greater success for your home.

Finding the right battery for your needs can be difficult, and if you are not aware of what you need, you may make the wrong choice.

To make your choice a bit easier, we have found some of the best solar batteries in the UK and compared them on every important aspect, this has resulted in this top 6 list:

While we have done our best to find the best solar batteries on the market, the ones we’ve found might not fit your specific needs, as every home is different. To make sure you get the best battery for your home, you should consult an installer, as they will account for everything when finding the right battery for you.

Use our service to get in contact with multiple installers so you can be sure that you get the best price. All you need to do is answer some simple questions, and you’ll receive up to 4 free, non-binding quotes from certified installers who will give you offers on solar batteries.

In collaboration with solar expert Joshua M. Pearce, we have carefully selected four critical categories for evaluating solar batteries:

These categories served as the foundation for our comprehensive analysis of over 30 brands, aiming to identify the best solar batteries available.

Each battery has been assessed within every category and assigned a GreenMatch rating. This rating reflects the battery's overall performance and serves as a straightforward guideline for consumers. By using the GreenMatch rating, users can effortlessly compare various batteries and choose the best solution for their specific needs.

Our research methodology, grounded in expert collaboration and a focus on key performance indicators, ensures that our findings are reliable and relevant.

The Tesla Powerwall 3 is the solar battery that performs best in all the categories. This battery from Tesla will fit into most homes and can even store energy from the grid. This makes it possible to extract energy when it’s cheapest and use it during peak pricing, further reducing your energy costs.

For more specs on this battery, see the datasheet. 

The battery modules can be connected in series, making a total capacity of 140kWh possible. This is not necessarily for the average household, but if you have a large property with a high electricity usage, this is a great feature.

The 10-year warranty ensures that you can trust this battery will function for many years without fear of system failure. At a price that doesn’t break the bank, it’s a great option for your home.

The Chem Resu Prime range from LG comes in a wide variety of sizes and capacities, so you can customise the total capacity to fit your needs. Each battery is slim and compact and will fit into most homes without it being very noticeable.

For more detailed information on this battery, see the datasheet.

When you consider all aspects of capacity, like depth of discharge (DoD), the LG Chem Resu series has the best usable capacity per battery. But in total capacity, it is among the lowest, with 32kWh compared with Sunsynk L5.1, which has a total capacity of 163.84kWh.

32kWh will often be more than enough for the average UK household. For a 2-3 person household, an 11-12kWh is sufficient, so only one LG battery will be enough.

Generac batteries outperform all the other batteries on the list when it comes to efficiency. With an output of 10.9kW you can expect that the battery will provide you with power even if you have all your appliances running, using up every last bit of stored energy.

High efficiency ensures that the battery will provide you with power when you need it.

For more detailed specifications, see the datasheet on this battery. 

The Generac battery is built as a battery cabinet, in which you have three to six battery modules “stored”. With each 3kWh you can combine two cabinets resulting in a total capacity of 36kWh. This makes the battery very customisable and with a high output, making it a very good option for both smaller and larger households.

This battery from Sunsynk is a great solution for the price-conscious user. The cost of this battery is among the lowest at £1,400-£2,000, but Sunsynk didn’t compromise on capacity or efficiency considering the low price.

You can find more details on this battery in the datasheet.

With the lowest price among all the batteries on the list, the SunSynk L5.1can give you almost the same benefits without rinsing your wallet. You should be aware that, for solar batteries, price and quality are often correlated. If you are looking for an affordable battery with great value for money, this is the one for you.

Givenergy has a 12-year warranty, the longest of all the batteries on this list. A long warranty symbolizes the brand's trust in the product’s longevity. Apart from the long warranty, Givenergy batteries have great efficiency, being among the highest performers on this list.

You can look at the datasheet for more information on the battery from Givenergy.

While Givenergy batteries have the longest warranty period, the total capacity you can get from their batteries is limited to only 17.5kWh. The capacity makes the battery suitable for households with a low to medium energy demand. For households with higher energy demand, Generac or Tesla batteries will be a more suitable option.

Bluetti batteries have a wide capacity range and can be used in your home, boat, or caravan. This makes them a great choice for most people looking for batteries that can fit different situations.

The batteries from Bluetti provide you with unparalleled portability, making them accessible for any location. This is the battery for you, if you’re looking for a solution for home appliances, both big and small. Additionally, while the overall capacity is not as high as others on this list, the range of batteries they provide gives a lot of options that can serve multiple, from home energy needs to mobile homes or singular appliances.

We created the GreenMatch rating to help users compare batteries. This rating covers all the important aspects of a battery and ensures that you’ll be able to make the right choice for your needs.

To make the rating easy to understand, we divided this overall rating into 4 categories that cover the valuable specs that are important when choosing a solar battery.

So, are solar batteries worth it in the UK? Yes, they can be. Solar batteries can help save up to £5 per day, even without factoring in solar panels. With solar panels, they can save up to £1,220 if you export energy back to the grid. This can increase your energy independence and make your home eco-friendly. To get a more accurate idea of potential solar panel costs and savings based on your home address, use our free solar calculator.

Similarly, solar products come with great prices due to government solar panel grants. Another way to get the best prices is to hire a reliable installer.

With our list of batteries, you have a lot of information that can help you with choosing the battery that best fits your needs. While we have given you a lot of useful information, the best battery for you may not be on this list. To be sure that you get the battery perfect for you, we recommend you consult a reliable certified installer. They can assess your needs and find the best battery possible. Usually this takes hours of research and calling up companies if done on your own.

Fortunately, we can help you get solar battery quotes from vetted professionals in no time. All you need to do is fill out a 30-second form, and you’ll receive up to 4 free, non-binding quotes from the best solar installers near you.

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