🔎 We’ve evaluated 67 batteries based on nine key characteristics

🏠 The best solar battery overall is the Fox ESS ECS2900

🔋 It’s important to check a battery’s depth of discharge

💪 You can scale up most batteries – but it’s better to buy big straight away

🌡️ Some can cope with temperatures as low as -20°C, or up to 55°C

What are the best solar batteries?

Table sources explained

1. Fox ESS ECS2900-H2

2. Fox ESS EP12

3. SolaX T-BAT-SYS-LV D150

4. GivEnergy Giv-Bat 9.5 (Gen 3)

5. LG Enblock E15

6. Duracell Dura5 Solar Battery

7. Tesla Powerwall 3

8. GivEnergy Giv-Bat 5.12

9. Fox ESS EVO 10

10. Enphase IQ Battery 5P

How did we select the best batteries?

Charge/discharge rate

Capacity

Depth of discharge (DoD)

Scalable limit

Total usable capacity

Round-trip efficiency

Warranty

Operating temperature

Ingress Protection rating

Summary

The best solar batteries: FAQs

Which is the best solar battery?

How long does a storage battery last?

What size battery should I get?

The 9 best solar batteries [UK, 2025]

The 9 best solar batteries in the UK

📈 The Tesla Powerwall 3 is built for big homes with very high consumption levels

⚡ It offers Emergency Power Supply, but this is rarely needed in the UK

🏠 Its large size and high cost make it unsuitable for many UK homes

🛠️ It's very heavy, making it basically impossible to install in lofts

🔋 The battery is DC-coupled, making it more efficient than AC-coupled models

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What is the Tesla Powerwall?

What’s different about the Tesla Powerwall 3?

Key features of the Tesla Powerwall 3

How much does the Tesla Powerwall 3 cost?

How is the Tesla Powerwall 3 installed?

Can you use the Tesla Powerwall 3 off-grid?

Is the Tesla Powerwall 3 compatible with optimisers?

Is the Tesla Powerwall worth it?

FAQs

Is the Tesla Powerwall 3 worth it in the UK?

What is the lifespan of a Tesla Powerwall?

How long will 13.5kWh last?

Is the Powerwall 3 noisy?

What is the failure rate of the Tesla Powerwall?

Can one Tesla Powerwall power a house?

Here are the Powerwall 3’s key features, why it's better than previous models, and whether it's worth its hefty price tag.

Is the Tesla Powerwall worth it? [UK, 2025]

Is the Tesla Powerwall worth it in the UK?

🔋 A solar battery should ideally be installed in a garage or on an external wall

🚨 You can get a battery installed inside, though you may need a fire alarm

🤝 Your battery and inverter must be installed near each other

⚡ Your installer should show you how to control your battery

Where should a solar battery be installed?

How is a solar battery installed?

Can you retrofit a battery to an existing solar panel system?

Next steps

Solar battery installation: FAQs

Can I install my own solar battery system?

How much does it cost to install a battery in a solar panel system?

How long will a 13.5kW battery last?

Here's how a solar battery installation should go, from which locations are suitable to how you can control your battery.

Solar battery installation: step by step [UK, 2025]

Solar battery installation: step by step

🔋 A 5kWh solar battery typically costs £3,000-£4,000 as part of a wider installation

💷 It costs more to add a battery to your system later on

➕ Sunsave Plus offers a free out-of-warranty replacement battery

✅ There's no VAT on solar batteries – in any situation

❌ The cheapest battery type is lead-acid, but it's usually not worth it

What’s the average cost of a solar battery?

Are there any grants available for solar batteries?

Warm Homes: Local Grant

Warm Homes: Social Housing Fund

Warm Homes Programme

VAT discount

What factors affect the cost of a solar battery?

🤔 Thinking of going solar? Here's why a larger system makes sense ⬇️

What’s the cheapest type of solar battery?

Solar battery maintenance costs

Are solar batteries worth the cost?

Solar battery costs: FAQs

How much does a solar battery cost in the UK?

Is it worth getting a battery with solar panels in the UK?

How much is a 10kWh battery?

How long will a 5kWh battery last?

Is a 10kWh battery enough to run a house?

What happens to solar power when batteries are full?

How many solar panels do I need for a 5kWh battery?

How much does a Tesla battery cost?

Here's how much solar batteries cost, what affects the price, and whether they're worth the investment.

Solar battery costs UK: the expert guide [2025]

✂️ A solar & battery system can cut your electricity bills by 86%, on average

💷 You can access the best export tariffs and time-of-use tariffs

⚡ You may also be able to benefit from joining a virtual power plant

🏡 The average UK household will need a 5-6kWh battery

🔋 Lithium-ion batteries are currently the best choice for most homes

🔧 They last about 10-12 years, then they need replacing

What is a solar battery?

How does a solar battery work?

A bit more detail

Should you get a solar battery?

How can a solar battery save you money?

The concept of ‘self-consumption’ is a very important one in solar, as it refers to the quantity of electricity generated by your panels that you’re actually using at home, as opposed to sending to the grid. Adding a battery to a solar panel system is a bit of a no-brainer, as it will dramatically increase your self-consumption and give you access to some of the best solar export tariffs.

How much power can a solar battery provide each day?

How much can you save with a solar & battery system?

How much does a solar battery cost?

Green home rewards

Welsh Government Warm Homes Programme

Green Homes Wales

How to choose a solar battery

When having solar panels installed, it makes more sense to get a DC-coupled battery, as you can integrate it with the inverter. This means there are few power conversions, which minimises electricity loss. An AC-coupled battery is preferable for battery-only installations, or if you’re retrofitting one to an existing solar panel system.

As well as increasing your energy bill savings, some storage batteries also come with an Emergency Power Supply (EPS) feature, although you will have to pay extra to have this capability installed. However, most areas in the UK don’t have power cuts regularly enough to make EPS worth the additional cost.

Do solar batteries require any maintenance?

How many UK households have solar batteries?

How are solar batteries installed?

What are the different types of solar battery?

Is a solar battery worth it?

Solar batteries: FAQs

Can I ‘go off grid’ with solar and batteries?

How long do solar batteries typically last?

Can I add battery storage to my existing solar panel system?

Are there any UK government incentives for installing solar batteries?

Can solar batteries be installed outside in the UK?

How many solar batteries are needed to power a house?

What are the disadvantages of using solar batteries?

Is a 5kWh battery enough to run a house?

Here's how solar battery storage works, how to pick the best type for your home, how much it can save you, and whether it's worth it.

Solar battery storage: is it worth it? [UK, 2025]

Solar battery storage: is it worth it?

🔋 Battery-only homes need a time-of-use tariff – but there's only one

❌ You can’t earn any export income

💷 A battery is more expensive to buy and install without solar panels

👎 You’re unlikely to ever break even on a standalone battery

📈 You’ll still be vulnerable to energy price inflation

☀️ As part of a solar & battery system, a battery is extremely profitable

Get a quote for a solar & battery system

Can you have a storage battery without solar panels?

What are the benefits of battery storage without solar?

Setting up Emergency Power Supply functionality for a battery requires additional hardware, time and labour, which naturally adds to the overall cost. For example, as a vital safety measure, you must have something called an ‘earth spike’ put into the ground about 1.5 metres deep.

What are the disadvantages of battery storage without solar?

How much does a standalone storage battery cost?

Are standalone batteries worth it?

Battery storage without solar: FAQs

Can you have a home battery without solar panels?

How much does home battery storage without solar cost?

How much battery storage do I need to run a house in the UK?

Is battery storage worth it without solar?

Do you have to notify your DNO about battery storage?

Understand the key limitations of battery storage without solar panels, and why it’s better to include solar.

Home battery storage without solar | Is it worth it? [UK, 2025]

Home battery storage without solar in the UK

🔋 Lithium-ion batteries are the most popular battery for solar panel installations

⏳ Lead-acid batteries are the cheapest, but they don’t last long

📅 Flow batteries last the longest but are impractical for residential use

🧂 Sodium-ion batteries are eco-friendly but still in development

❌ Domestic nickel-cadmium batteries are banned in the UK

What are the five types of solar battery?

What’s the best type of solar battery?

Solar battery types: FAQs

Which solar battery lasts the longest?

What is the most common solar battery?

How do I know what solar battery I need?

Understand the five main categories of solar battery in the UK and their key benefits and drawbacks, from lead-acid to lithium-ion.

The 5 different types of solar battery [UK, 2025]

The 5 different types of solar battery

📈 A larger storage battery can significantly increase your self-consumption

🧠 You can earn more from smart export tariffs

💷 It’s cheaper to get a larger battery straight away, instead of waiting

1. The majority of the cost doesn’t change

2. Increase your self-consumption

3. Make the most of smart export tariffs

4. Prepare for the future

5. Get more out of the Demand Flexibility Service

A larger battery can save you more money, soften the blow of price rises, and future-proof your home – among other benefits.

5 reasons to get a larger storage battery [UK, 2025]

5 reasons to get a larger storage battery

⚡ EPS is a battery function that keeps solar electricity flowing during power cuts

🏠 There are four levels of EPS, from a single socket to a whole home

💷 It usually costs thousands of pounds to activate

❌ The average UK home doesn’t suffer enough power cuts to make EPS worth it

⚕️ If you have medical equipment that needs to stay on, EPS could be vital

What is emergency power supply (EPS) for solar?

Is EPS for solar necessary in the UK?

Does every battery have EPS functionality?

Is EPS for solar worth it?

EPS for solar: FAQs

What is the EPS mode on my inverter?

What triggers EPS?

What is EPS overload for an inverter?

Here's how EPS for solar works, the different levels of electricity provision it offers, and whether EPS is worth it for your home.

EPS for solar: is it worth it? [UK, 2025]

EPS for solar: is it worth it?

Batteries