🔋 The best battery tariff depends on your behaviour

🏆 Good Energy Heat Pump is the best pick for the average home

🐙 But you could potentially save more with Agile Octopus

💷 Homes with a battery could save hundreds of pounds per year

✅ It’s simple to sign up for any of these tariffs

What are the best battery tariffs?

Table notes & sources

How do battery tariffs work?

The best battery tariffs: explained

Summary

FAQs

How much can you save with a battery tariff?

Do you need a battery tariff if you have a battery?

What’s the cheapest time to charge your battery?

View article sources

The 3 best battery tariffs [UK, 2026]

The 3 best battery tariffs

🔌 An AC-coupled battery connects directly to your fuse board

📉 They’re more expensive and less efficient than DC-coupled models

💷 But if you’re adding a battery to a solar panel system, they’re worth it

🔋 Standalone batteries should always be AC-coupled

🦊 Brands like Tesla and Fox ESS make top-tier AC-coupled models

What is an AC-coupled battery?

AC-coupled vs DC-coupled batteries

When are AC-coupled batteries necessary?

The best AC-coupled batteries in the UK

Is an AC-coupled battery worth it?

AC-coupled batteries: FAQs

What’s better, an AC- or DC-coupled battery?

How do you install an AC-coupled battery?

Are AC-coupled batteries more expensive?

How can you tell if a battery is AC- or DC-coupled?

If you’re buying a standalone battery or adding a battery to your solar array, get an AC-coupled model – but a DC-coupled machine is better for a new solar & battery system.

AC-coupled batteries: are they worth it? [UK, 2026]

AC-coupled batteries: are they worth it?

☀️ You can get solar panels without a battery

🔋 But it’s much more profitable to get a solar & battery system

📈 94% of new solar panel installations in the UK include a battery

💷 Having a battery allows you to save and earn more

⚡ You could also get home battery backup for power cuts

Can you get solar panels without a battery?

How do solar panels work without a battery?

What are the downsides of solar panels without a battery?

Solar panel costs without a battery

Solar panel savings without a battery

Is it worth getting solar panels without a battery?

Is a 10kWh battery large enough to run a house?

Is it better to have more solar panels or bigger batteries?

Is it better to have solar panels with or without a battery?

Here are all the reasons why you should get a battery with your solar panels, as well as the kind of costs, savings, and income you can expect with and without a battery.

Solar panels without battery storage: is it worth it? [UK, 2026]

Solar panels without battery storage: is it worth it?

🔎 We’ve evaluated 68 batteries based on nine key characteristics

🏠 The best solar battery overall is the Fox ESS EQ2900

🔋 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 EQ2900-L2

2. Fox ESS EP12

3. SolaX T-BAT-SYS-LV D150

4. EcoFlow PowerOcean EF BD-5.1-S1

5. LG Enblock E15

6. AlphaESS SMILE-G3-BAT-4.8S

7. Duracell Dura5 Solar Battery

8. Tesla Powerwall 3

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

The best solar batteries: FAQs

Which is the best solar battery?

How long does a storage battery last?

What size battery should I get?

Find the best solar battery for your home, based on our analysis of 68 different battery models from 14 manufacturers.

The 10 best solar batteries [UK, 2026]

The 10 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?

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, 2026]

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, 2026]

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 [2026]

✂️ A solar & battery system can cut your electricity bills by 94%, 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, 2026]

Solar battery storage: is it worth it?

💷 You can save hundreds of pounds per year with a standalone battery

🏠 Standalone batteries are particularly suited to homes that can’t go solar

🏆 Good Energy Heat Pump is the best tariff for standalone battery owners

⚡ Joining a virtual power plant can allow you to save even more

🔋 A battery costs around £3,000 to £7,000

Get a quote for a solar & battery system

Can you have battery storage without solar panels?

How does a battery-only system work?

Who are standalone batteries best suited for?

How much does battery storage cost?

Can't get solar panels? A home battery on a time-of-use tariff can still cut your electricity bills. Here's how it works and whether it's worth it.

Home battery storage without solar | Is it worth it? [UK, 2026]

Home battery storage without solar in the UK

Batteries