🔋 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

☔ If it goes outside, your battery should be protected against water damage

🤝 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]

What's in this guide?

Solar battery installation: step by step

💷 A 5kWh solar battery typically costs around £5,000 on its own

🔋 You’ll pay just £2,000-£3,000 if it’s installed at the same time as solar panels

➕ 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?

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

Are there any grants available for solar batteries?

Home Upgrade Grant

Warm Homes: Social Housing Fund

Warm Homes Programme

VAT discount

The UK's first solar subscription

What factors affect the cost of a solar battery?

What’s the cheapest type of solar battery?

Solar battery maintenance costs

Are solar batteries worth the cost?

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?

Solar battery costs UK: the expert guide [2025]

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

📉 Storage batteries are at their lowest price in history

🏡 The typical three-bedroom home will need a 5-6kWh battery

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

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

What is a solar battery?

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.

The pros and cons of solar battery storage

Is a solar battery worth it?

How much does a solar battery cost?

What size solar battery do you need?

How to choose a solar battery

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?

Sign up for Sunsave Plus

What are the different types of solar battery?

How many UK households have solar batteries?

How are solar batteries installed?

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.

Are solar batteries worth it? [UK, 2025]

Are solar batteries worth it?

🔋 With a battery, you can use an Economy 7 tariff to import cheap electricity

💷 A battery costs £2,000-£3,000 more 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

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Get a quote for a solar & battery system

Can you have a storage battery without solar panels?

What's the best export tariff to use with a storage battery?

How much does a standalone storage battery cost?

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

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 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 five 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?

🏡 The average three-bedroom household should get a 5kWh battery

🔋 A well-sized battery can significantly improve your energy independence

⚡ Multiple factors affect what size battery you should choose

➕ It's possible to increase your storage capacity later on

What size solar battery should you get?

What does ‘solar battery size’ actually mean?

Every battery has an internal management system that will automatically prevent someone from drawing power beyond its Depth of Discharge, so there’s never any danger of misusing a battery in this way.

Getting the right size storage battery for your solar panels is very important. The key factor to consider is your annual electricity usage, but there are lots of other things to think about too. At Sunsave, our solar experts will analyse your needs closely before suggesting a specific battery size, so you don’t need to worry about working it out yourself.

How to work out what size solar battery you need

Should you get a larger battery?

Solar battery sizing: FAQs

Can I rely solely on solar power for my home?

What factors affect the performance of my solar battery?

Is it worth investing in a solar battery storage system?

How do I maintain my solar battery for optimal performance?

How long will a solar battery store electricity?

Can you increase your battery storage capacity later on?

Here's why it’s important to get the right size solar battery, and how your installer will choose a size that suits your home.

What size solar battery do I need? [UK, 2025]

What's in this article?

What size solar battery do I need?

🔋 Lithium-ion solar batteries typically last 10-12 years

📅 This is around half the average lifespan of solar panels

📜 The typical warranty for a solar battery is around 10 years

🔎 Maintenance and monitoring is the best way to increase battery longevity

😎 Make sure you also keep your battery in a cool, dry location

What’s the typical lifespan of a solar battery?

Which type of solar battery lasts the longest?

Why do solar batteries not last as long as solar panels?

Signs your solar battery needs replacing

How to ensure your solar battery lasts as long as possible

How long do solar batteries store electricity for?

Solar battery lifespan: FAQs

How often do solar batteries need to be replaced?

How long does a fully charged solar battery last?

What are three drawbacks to storing solar energy in batteries?

Before you go solar, you should know how long your battery will last. Here's their average lifespan, the reasons behind it, and how to extend it.

How long do solar batteries last? | Average lifespan [2025]

How long do solar batteries last?

Batteries