Solar Battery Storage Prices & Costs (UK 2026)

If you’ve already invested in solar panels or are thinking about going solar, adding a battery could take your savings even further. If you didn't already know, a solar battery lets you store the energy your panels generate during the day and use it later in the evening.

However, it's important to be aware of the costs so you can budget appropriately.

Ultimately, solar battery storage prices in the UK can vary depending on your system size and the battery’s capacity. Whether you’re looking for a compact battery to support a small solar setup or a larger unit to power most of your home, understanding the costs are an extremely important step.

In this article, you’ll get a clear breakdown of average solar battery storage prices in 2026, key price factors and potential savings on your energy bills. By the end, you’ll know what to expect and how to find the best deal for your home.

Thinking about installing solar battery storage? Get a free, no-obligation solar battery storage quote below:

What is Solar Battery Storage?

Before we delve into the costs of battery storage, it’s worth understanding exactly what solar batteries are and how they work.

A solar battery is a device that stores the excess electricity your solar panels generate during the day. Instead of sending all that unused power back to the grid, the battery keeps it for you to use later, like in the evening or on cloudy days when your panels aren’t producing as much energy.

During daylight hours, your panels 'deposit' power into the battery. When you need electricity later, you can take it directly from your stored supply, reducing your need to take expensive energy (during peak times) from the grid.

Also, solar batteries come in different sizes which determines how much energy you can store. Smaller systems may run a few essentials, like lights and appliances, while larger batteries, such as the Tesla Powerwall 3, can power most of your home.

By storing and using more of your own solar energy, you have the opportunity to potentially lower your energy bills and reduce your carbon footprint even further, which is especially important nowadays with the cost of living crisis.

Types of Solar Batteries

When you start looking into solar battery storage, you’ll quickly see there are several different battery types, each with their own pros and cons. Understanding the basics of each one helps you choose a system that matches your needs, as well as your budget:

• Lead-acid: A long-established technology often used in off-grid and backup systems. These batteries are usually cheaper upfront but larger, heavier and tend to have a shorter lifespan and lower efficiency compared to newer options.

• Lithium-ion: The most common choice for home solar battery storage today. Lithium-ion batteries are compact, lightweight, efficient and offer a long lifespan, making them ideal for most households looking for reliable day-to-day energy storage.

• Lithium-ferro-phosphate (LFP): A specific type of lithium-ion battery known for excellent safety, long cycle life and good thermal stability. LFP batteries are becoming increasingly popular in home systems because they balance performance, durability and peace of mind.

• Nickel-cadmium: A robust battery type that can handle deep discharges and extreme temperatures. However, nickel-cadmium batteries are less common in homes due to higher costs, lower efficiency for domestic use and environmental concerns around cadmium.

• Sodium batteries: An emerging alternative that uses more abundant materials than lithium. Sodium-based batteries are still developing for home use but offer the potential for lower costs and better sustainability in the future.

• Flow batteries: A more advanced technology where energy is stored in liquid electrolytes that 'flow' through the system. Flow batteries can be scaled up easily and offer long lifespans, but they are usually larger and more expensive, so they’re more often used in commercial or larger-scale projects than in typical homes.

How Much Does Solar Battery Storage Cost?

According to Money Saving Expert, the average cost of a solar battery in the UK is around £5,000 for a standard battery system.

However, it could be more or less than that as several factors can influence the price you pay. The size and capacity of the battery are two key factors. Larger batteries can store more energy and are ideal for homes with high electricity use.

The brand, model and installation setup can also make a difference, as some systems include smart features or longer warranties that add long-term value.

Another major consideration is whether you’re installing a battery alongside new solar panels or adding it to an existing system. Retrofitting a battery can involve extra wiring and equipment, whereas installing both at the same time is usually a smoother process.

Although solar batteries add to your upfront costs, it's important to remember that they can help you save more over time. By storing and using your own solar power, you can cut your electricity bills and make your home more energy independent.

Real-life Examples of Solar Battery Costs

When you’re looking into solar battery storage costs, it’s useful to understand what you could pay for the battery itself and the installation. At Glow Green, as a guide based on a 6kW inverter, you could expect prices in the following range for battery storage and installation:

• 1 x Duracell Dura5 5.12kWh - £4,275
• 2 x Duracell Dura5 5.12kWh - £5,375
• 3 x Duracell Dura5 5.12kWh - £6,775
• 4 x Duracell Dura5 5.12kWh - £8,175

These examples give you a rough idea of how costs increase as you add more battery capacity, helping you think about what might suit your budget and energy needs.

If you’re looking for a more affordable but still reliable option, you could choose a Fox ESS battery, with prices starting from £4,045 on a 6kW inverter.

If you’re aiming for a premium solution, Glow Green also installs the Tesla Powerwall 3, with guide pricing from £7,695 on a 6kW inverter.

Ultimately, we recommend discussing your preferences and circumstances with us so we can provide you with a personalised, accurate battery storage quote.

Please note that all prices are subject to change.

Key Factors That Impact Solar Battery Prices

As mentioned above, there are many factors that can affect the overall price of solar battery storage for your home. Knowing these factors in advance can help you get the best long-term value from your investment:

• Battery capacity and size
  The larger the battery, the more energy it can store, and the higher the price is likely to be. Choosing the right capacity depends on how much electricity your household uses and how much solar power your panels generate.

• Battery type and technology
  Lithium-ion batteries are the most common and efficient, offering long lifespans and better performance. However, there are also lead-acid and other alternatives that may cost less upfront but don’t usually last as long.

• Brand and warranty
  Well-known brands often come with higher price tags but typically include better support, longer warranties and proven reliability. A strong warranty can also give you peace of mind that your system will perform well for years.

• Installation complexity
  The setup process can affect total cost. For example, retrofitting a battery to an existing solar system can require extra wiring or upgrades. Installing the battery at the same time as new solar panels can often be simpler and less labour-intensive.

• System integration and features
  Some batteries come with smart energy management systems, integration with home energy apps or backup power capabilities. These features can improve efficiency and control but may add to the overall price.

• Installer expertise and location
  The company you choose and where you live can influence installation fees. Experienced, certified installers may charge more, but they ensure the job is done correctly and safely.

Thinking about solar panels and battery storage? Our detailed guide on solar quotes explains exactly what to expect.

How Much Can You Save With Solar Battery Storage?

Unfortunately, it’s hard to say exactly how much you could save with a solar battery because every home is different. The amount you save depends on how much electricity you use, the size of your solar system and how you use your energy throughout the day. Since the price you pay for your solar battery can vary, this also affects your return on investment.

While savings vary, a solar battery can significantly reduce your reliance on grid electricity, a major benefit with electricity costs on the rise.

Also, if you’re on a time-of-use tariff, you can also save by using your battery strategically. For example, you could charge it during off-peak hours when electricity is cheaper and use that stored power during peak times when prices are higher.

Another benefit, which we've briefly touched on, is protection from rising energy prices. As electricity costs continue to fluctuate, generating and storing your own renewable energy gives you more control over what you spend. The more you rely on stored solar energy, the less you’re affected by future price increases.

Ultimately, to get a clearer idea of your potential savings, it’s best to speak with your installer directly. A trusted company, such as Glow Green, can provide you with a personalised estimate. This ensures you know exactly what kind of savings to expect before committing to a solar battery system.

How to Choose the Right Solar Battery Size

Choosing the right solar battery size helps you avoid overspending and ensures you end up with a system that performs exactly how you want it to.

To find the most appropriate solar battery for your needs, you’ll want to pay close attention to two key factors:

1. The energy output of your solar panels

2. Your household’s energy consumption

The aim is to strike a balance - a battery large enough to store the excess electricity your panels generate during the day, but not so large that you’re paying for storage capacity you’ll rarely, if ever, use.

Glow Green can help you assess both of these factors, often by looking at your recent electricity bills and the performance data from your solar panels. This information provides a clear picture of how much energy you generate versus how much you typically use, helping you match your battery size to your everyday energy habits.

Of course, there are other things to think about too. Your your goals for energy independence and your budget will all influence what size battery makes the most sense.

For example, if you want to rely less on the grid and become more self-sufficient, a larger battery may fit your goals. However, if your energy usage is lower or you’re mainly looking to save money, a medium-sized system could be a better and more cost-effective option.

Can You Get a Grant for Solar Battery Storage?

It's important to be aware of any solar grants or financial incentives available to help with the cost of a solar battery. While there aren’t currently any major nationwide grants specifically for solar batteries, there is some good news that can make your investment a little more affordable.

In the UK, both solar panels and solar batteries qualify for 0% VAT under the government’s energy‑saving materials rules. This zero rate applies to most domestic installations and effectively removes the usual 20% VAT charge from the supply and installation of qualifying solar panels and battery systems.

However, this 0% VAT relief is time‑limited. It was first introduced for solar panels in April 2022 and later extended to include standalone and retrofitted battery systems from 1 February 2024. It is currently scheduled to run until 31 March 2027, after which the VAT rate on qualifying installs is expected to revert to a reduced 5%.

Although this isn’t a traditional grant you have to apply for, it still works like an immediate discount on your overall installation cost. The 0% VAT is usually applied automatically by your installer on the quote and invoice, so you see the saving upfront without any extra paperwork.

Is a Solar Battery Worth It?

After looking at the costs of solar batteries, it’s only natural to wonder whether battery storage is really worth it. Ultimately, the answer depends on what you’re hoping to get out of it. While a solar battery can certainly save you money over time, its true value goes beyond just financial returns.

If your main goal is purely financial gain, a solar battery may not feel worthwhile right away. In many cases, these systems require a substantial upfront investment, and depending on your energy usage and tariff, it might take several years to fully recoup those costs.

Therefore, it’s important to look at the bigger picture.

While the long-term savings can still be a strong motivation, solar batteries offer immediate benefits that make them appealing for many people. One of the biggest advantages is reduced reliance on the energy grid. By storing and using more of your own clean electricity, you protect yourself from fluctuating energy prices and gain more control over how you power your home.

This also means you’re better prepared for potential power cuts, giving you peace of mind during outages.

Another major benefit is the positive environmental impact. Pairing solar panels with a battery allows you to use more of the renewable energy you produce, which reduces waste and cuts your carbon footprint even further.

Ultimately, the decision comes down to your goals. If you’re focused only on short-term financial payback, it might not be the right time. However, if you value energy security, sustainability and long-term savings, a solar battery can be a smart addition to your home energy system.

Take a look at our guide where we’ve ranked the best solar batteries available today to help you find the perfect fit for your energy needs.

Solar Battery Prices and Costs FAQs