Solar Battery Storage Cost & Installation Prices UK

The big question, of course, is cost.

In the UK, solar battery storage prices vary depending on the battery size, brand, inverter setup and how straightforward the installation is at your property. Some homes are simple. Some are not. And yes, that affects the final price.

Whether you’re adding a battery to an existing solar system or installing one without solar panels, this guide covers what you can expect to pay, what affects the cost, and whether battery storage is actually worth it.

PS We offer MCS-certified battery installation nationwide. Simply answer these questions, get your fixed price and arrange your free design.

How much does a solar battery cost in the UK?

Let’s get straight to it.

Home battery prices in the UK usually start from around £1,200 at the lower end and can go beyond £5,000 for larger or more premium systems.

But that’s only part of the story.

And that’s the number that matters, because installation costs can vary depending on the setup, inverter requirements, cable runs and how much electrical work is involved.

A better way to compare batteries is by looking at cost per kWh. That tells you how much you’re paying for each kilowatt-hour of storage, which makes comparing different brands much easier.

In general:

• smaller batteries cost less overall, but can be worse value per kWh

• larger batteries cost more upfront, but often offer better value

• premium all-in-one batteries tend to cost more, but usually give you a cleaner, simpler install

So no, it’s not just about buying the cheapest battery and calling it a day.

Average Prices of Popular Battery Storage Models UK: 

Table last updated and prices accurate as of March 2026

What affects the cost of battery storage?

Battery prices are shaped by more than the logo on the front.

Here’s what actually moves the number:

Battery size:

This is the obvious one. More storage means a higher price.

Smaller homes may only need a modest battery.

Larger homes, households with higher evening usage, or homes with an EV often lean towards 10 kWh to 13.5 kWh systems or more.

Brand:

Some battery brands are built to hit a lower price point.

Others sit at the premium end, with better apps, better warranties, neater hardware or stronger brand reputation.

Inverter setup:

Some batteries come with the inverter built in. Others need one separately.

That matters because it can change both the equipment cost and the installation cost.

Installation complexity:

This is where prices can differ even if two people choose the exact same battery.

Things that can affect the quote include:

• how far the battery is from the consumer unit

• whether it’s going indoors or outdoors

• whether the property already has solar

• whether the existing inverter is compatible

• whether you want backup power or EPS

• how easy the cable routing is

In other words: same battery, different house, different price.

Explore a Battery Storage Case Study: Check out an insightful Q&A session featured in one of our detailed case studies on battery storage. Hear directly from a Heatable customer in the UK and gain valuable perspectives on their experience here.

The image above features a Tesla Powerwall 3 installation performed by our team of Tesla-certified installers at Heatable.

Typical solar battery installation prices

A battery installation quote usually includes much more than just turning up and bolting a unit to the wall.

A proper installation may include:

• the battery unit

• inverter or hybrid inverter

• isolators and protection equipment

• cable runs

• mounting hardware

• commissioning and testing

• app setup and handover

• any required paperwork

If you already have solar panels, your installer may also need to check whether your existing inverter is battery-compatible or whether additional hardware is needed.

That’s why online “from” prices can be useful for rough research, but not much more than that.

Average prices of popular battery storage models in the UK

This section works best as a comparison table, but it needs to feel current.

If you’re keeping exact pricing in, make sure it has:

• a visible last updated date

• a realistic price format

• either supply-only plus typical install cost, or full installed ranges

Better yet, use installed price ranges instead of pretending every home gets the same quote.

Do you need an inverter with a solar battery?

Usually, yes.

Batteries store electricity as direct current, while your home runs on alternating current. So somewhere in the system, that power needs converting.

Some batteries need a separate inverter. Others are designed as all-in-one systems, where the inverter is built in.

Neither option is automatically better in every case. It depends on what you already have installed, what battery you want, and how the system is being designed.

Can you install a battery without solar panels?

Yes, you can.

And more people are doing exactly that.

Battery storage is no longer just for homes with solar panels. Plenty of homeowners now install a battery on its own to make use of time-of-use tariffs - charging the battery when electricity is cheaper, then using that stored power later when rates are higher.

It’s a smart move for some homes, especially if you can shift when you use electricity.

It’s also more appealing than it used to be, because qualifying residential battery installations can now benefit from 0% VAT, including standalone battery systems in the right circumstances.

So no solar? Still an option.

Retrofit battery vs battery with new solar panels

If you’re installing a battery as part of a brand-new solar system, the whole setup can usually be designed together from day one. That often makes things simpler.

If you’re adding a battery to an existing solar system, it can still work very well - but the final price depends on what’s already there.

That’s why retrofit quotes can vary more than people expect.

How much can you save with a solar battery?

This depends heavily on how you use electricity.

If you already have solar panels, a battery lets you store more of the power you generate during the day and use it later, instead of exporting it and buying electricity back in the evening.

If you don’t have solar, the savings usually come from charging the battery during cheaper off-peak periods and using that stored electricity when prices are higher.

Your savings depend on things like:

• your tariff

• your usage pattern

• how much electricity you use in the evening

• battery size

• whether you have solar panels

• whether you also charge an EV or run a heat pump

So be careful with any article that throws out one magic “annual saving” number as if every home works the same way. It doesn’t.

A realistic battery quote should be based on your actual setup, not fantasy averages.

Is solar battery storage worth it?

For plenty of homes, yes.

Battery storage can be well worth it if you:

• already have solar panels and export a lot of unused electricity

• use a decent amount of power in the evening

• are on a time-of-use tariff

• want more control over your energy usage

• like the idea of buying less electricity at peak rates

It may be less attractive if:

• your evening usage is low

• you’re only interested in the absolute shortest payback

• your budget is tight and flexibility is limited

The trick is not finding the “cheapest battery”. It’s finding the battery that makes sense for your home, your usage and your budget.

Are there any grants available for battery storage?

Not really in the way people hope.

There isn’t a broad UK-wide battery grant that most homeowners should build into their budget.

What matters more right now is VAT. Qualifying residential battery installations currently benefit from 0% VAT, which helps reduce the upfront cost.

That’s far more useful than chasing outdated grant information that may no longer apply.

You now pay 0% VAT on qualifying solar batteries

This is one of the better bits of news.

Battery storage is now more financially attractive because qualifying residential installations currently benefit from 0% VAT.

That includes more than just new solar-and-battery packages. It can also apply to retrofit battery installs and standalone batteries in qualifying cases.

In simple terms: batteries make more financial sense now than they did before.

What is the average lifespan of a solar battery?

Most modern home batteries use lithium-based cells and are designed to last for years, not months.

A good-quality battery will typically come with a warranty of around 10 years, though that varies by brand.

Over time, battery performance gradually reduces - that’s normal. What matters is:

• how much usable capacity remains over time

• what the warranty actually covers

• how reliable the brand is

• whether the installer knows what they’re doing

• A long warranty is great. A long warranty from a brand with poor support is less exciting.

What is the best battery available in the UK?

There isn’t one “best” battery for every home.

The right choice depends on:

• your energy use

• whether you already have solar

• whether you want backup power

• how much storage you actually need

• your budget

• whether you want an all-in-one or modular system

That said, some products have earned their popularity.

Tesla Powerwall is one of the best-known examples because it offers strong storage capacity, integrated hardware and a solid warranty.

But a well-matched system is better than a big-name badge bought for the wrong reason.

🎥 Watch our complete review of the latest Tesla Powerwall 3 below:

Popular battery brands to compare

When comparing battery brands, don’t just look at price.

Look at:

• usable storage

• installed cost

• whether the inverter is included

• warranty

• app quality

• expandability

• backup capability

• installer support

That’s the stuff that matters once the battery is actually on your wall and doing the job.

You can read our comprehensive review of the best batteries currently available here.

Next Steps For Your Battery Journey:

When planning to install battery storage for your home, there are several important factors to consider. Make sure to refer to the following guides to help you make informed decisions:

• What size battery do you need? 

• What is home battery storage? 

• Battery storage without solar panels 

• Pros and cons of battery storage

To dive deeper into these topics, head over to our advice section, check out our YouTube channel for informative videos, or read a customer case study to see how others have benefited from their battery installation. 

Get a Quote for Battery Storage Today 

Without boasting you should get your battery storage installed with us, here's why: 

• Thousands of Happy Customers: We boast an average score of 4.9 on Trustpilot, outperforming the market leader.

• Which? Trusted Trader: Heatable is proudly recognised as a Which? Trusted Trader.

• Tesla Certified Installer: Heatable is proudly certified and approved by Tesla to install the Powerwall.

• MCS Accredited: Our accreditation by the Microgeneration Certification Scheme (MCS) ensures high-quality standards.

• Consumer Protection: As members of the HIES consumer code, we provide 2-year deposit protection.

• Flexible Payment Options: Choose from multiple payment methods, including finance options.

• Fixed Price Guarantee: Enjoy transparency with no hidden costs.

• Save Your Quote: You can save your quote and decide later.

• Bespoke Battery Quote Tool: Find out which battery is ideal for your home, here.