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Last updated: 9 April 2024

6kW Solar System With Battery In The UK: Prices + Pros & Cons

6kw Solar Panel System Hero
  • 6kW solar systems are the best solar systems for large, 5-6 bedroom households.
  • A 6kW solar system with a battery in the UK will cost approximately £12,500 - £23,500.
  • You can expect your initial investment back in 12 years, with annual savings up to £1,005.

In recent years, finding ways to save money and reduce our environmental impact has become much more important. Installing a 6kW solar panel system is just one way homeowners are achieving this. These solar systems are ideal for large homes with 4 - 5 bedrooms and can provide clean, renewable energy for at least 25 years.

So, how much do solar panels for your home cost? Is a 6kW system powerful enough for your home? And what does it involve? Well, in this article we’ll help you find all the answers you’re looking for and discover whether a 6kW system with solar battery storage is worth it.

If you’re ready to switch to an energy system that can save you money year on year, we can help! Don’t waste hours of your precious time trawling the internet to find solar installers, by using our quick and simple form you can connect with up to 4 trusted local installers in your area quickly and easily. 

We’ve checked and vetted hundreds of professionals for our network, and we’re ready to help you find the best one for you. By comparing free, no-obligation quotes you can get the right price for the perfect new solar system for your home. To get started simply click the link below!

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6kW solar system with battery: what is involved?

How does a 6kW solar system work diagram

A 6kW solar system with a solar battery typically includes solar panels, an inverter, and a battery storage unit. This setup is designed to harness solar energy and make it readily available for powering appliances.

The process begins with the solar panels, which are usually installed on the roof or in an open area with maximum exposure to sunlight. These panels are composed of photovoltaic cells that capture sunlight and convert it into direct current (DC) electricity. 

The generated DC electricity then flows into the inverter, which serves the crucial role of converting the DC electricity into alternating current (AC) electricity. AC electricity is the standard form used in homes and businesses, making the inverter a vital component in the conversion process.

Once the electricity is converted into AC, it can be used to power the electrical appliances and devices within the home. Any excess electricity generated during the day, beyond the immediate needs of the household, is directed towards charging the solar battery storage unit. This stored energy can then be used during periods of low sunlight or at night, effectively reducing the reliance on traditional grid-supplied electricity.

Typically, a 6kW solar system will need between 13 to 16 panels. How many solar panels you need, however, will depend on several factors. On average, each solar panel will range from 250 to 450 watts, therefore your annual electricity needs will determine how many panels you require - but this will also be determined by the amount of space you have on your roof for installation.

6kW solar system with battery prices in 2024

A 6kW solar system will cost approximately £12,000 - £13,000, including installation. Additional spending should be considered, however, to account for extras such as solar battery costs and maintenance.

Solar panels require minimal maintenance, but annual servicing or cleaning of your panels will cost extra over time. To get an idea of the costs involved in installing a 6kW solar system, we’ve outlined some average prices in the table below.

System ComponentAverage Costs*
6kW Solar panels (inc. installation)£12,000 - £13,000
Solar battery£2,500 -  £10,000
Labour costs£600 - £1,000
Maintenance costs: cleaning panels£10 / panel
Maintenance costs: annual service£100 - £200
*Please note these prices are intended as a guide only and will vary depending on your unique requirements and suppliers.

How much electricity does a 6kW solar system produce in the UK?

On average a 6kW solar system can produce 5,100 kWh of electricity per year. For a large home, of up to 6 bedrooms, which consumes around 4,100 kWh on average, a 6kW system offers an adequate supply of energy to keep your home powered up all year long. 

Below is an estimate of approximately how much electricity a 6kW solar system can produce over time.

6kw Solar System Power Generate

If your home requires less energy use than mentioned, however, you may find a smaller system size is better suited to your needs. For example, if you have a smaller home, with 1-2 bedrooms a 3kW solar system will be ample for your needs. A medium home with 3-4 bedrooms, however, might be better suited for a 4kW solar system or a 5kW solar system in the UK.

Alternatively, if you have a much larger property with 6 or more bedrooms, you might want to consider a 12kW solar system. To get the best possible size for your home, and avoid overpaying for a system that doesn’t serve your needs, it’s recommended that you speak to a professional solar installer.

What is the break-even point and lifespan of a 6kWh solar system?

With an average lifespan of 25-30 years, a 6kW solar system can be relied upon to provide you with clean, renewable energy for the next few decades! In addition to being a reliable system, solar panels can also save you money over time. 

If you spend approximately £12,500 on your 6kW solar panels, you can expect to break even on your investment in just 12 years. This is based on predicted savings of £1,005 each year. There is also an opportunity to shorten this return time if you can take advantage of energy payment schemes, like the Smart Export Guarantee (SEG).

The SEG is a scheme which allows small, low-carbon energy generators to sell their excess electricity back to the grid for a set tariff. You will need to have a solar battery as part of your system, to collect your extra solar energy. However, selling this surplus is a great way to make additional savings. The amount you can make will vary depending on the supplier and the amount of energy you sell.

Saving money with solar energy is an ongoing benefit you can enjoy by installing solar panels. If you want to find out more about adding solar energy to your home, we can help! Forget calling every installer and waiting weeks for a response, instead use our quick, simple form and get connected with up to 4 highly-trusted, qualified professionals in as little as 48 hours. 

Our installers can give you free, no-obligation solar panel quotes for you to compare, so you can be sure you get the very best deal. Take just a few minutes of clicks today, to save you hours! Get started below.

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Advantages and disadvantages of a 6kW solar system in the UK

Installing a 6kW solar system in the UK comes with many benefits, but there are also factors to carefully consider to ensure this is the right choice for your home. Below are some of the advantages and disadvantages to think about.

6kW solar system pros and cons


  • Powerful energy output
    A 6kW solar panel system is designed to power large homes or properties, making it suitable for families of 5 people.
  • Reduced energy bills
    Installing a 6kW solar system can lead to significant savings on energy bills, of up to £1,107 a year. This system generates enough power to cover a substantial portion of an average household's energy needs, leading to considerable savings over time.
  • Government incentives
    Through government incentives, such as the Smart Export Guarantee (SEG) and feed-in tariffs, homeowners can earn money by selling excess solar energy back to the grid. 
  • Environmental benefits
    Solar power is a green, renewable energy source. By using a 6kW solar system, you reduce reliance on fossil fuels, thereby decreasing your carbon footprint and contributing to a healthier environment.
  • Energy independence
    Households using a solar system with a battery, reduce their dependence on the national grid. This independence from traditional energy sources can be beneficial during power outages or periods of high energy prices.
  • Long-term investment and increased property value
    Solar panels have a long lifespan and require minimal maintenance, making them a durable and cost-effective investment for the future. Properties with solar panel installations often also increase in value, energy efficiency is a desirable feature for homebuyers.


  • High upfront costs
    The upfront cost of purchasing and installing a 6kW solar system can be significant, although long-term savings on energy bills often offset this. To fully benefit from a solar system, especially during nights or cloudy days, you will also need a battery storage system, which adds to the overall cost.
  • Space requirement
    A 6kW solar panel system is quite large and may require a considerable amount of roof space, typically around 38m² to 43m². 
  • Poor location or roof angle
    The amount of sunlight a property receives can impact the efficiency of the solar panels, potentially affecting energy generation. The ideal roof angle for solar panels in the UK is between 30 and 40 degrees, which may not be suitable for all properties.
  • Weather dependent
    Solar panel efficiency is affected by weather conditions, and the UK's variable weather patterns may impact the consistent generation of solar energy.
  • Aesthetics
    Some people may find solar panels visually unappealing or unsuitable for their home's aesthetic.

Understanding these advantages and disadvantages can help you make informed decisions about integrating a 6kW solar system with a battery into your home, considering both the benefits and potential challenges.

Is a 6kW solar system worth it for UK households?

A 6kW solar system can be very worthwhile for UK households, particularly those seeking to reduce their reliance on grid-supplied electricity, save on energy bills, and contribute to environmental sustainability. 

The system's potential to generate a substantial amount of free electricity, coupled with the availability of government incentives such as the Smart Export Guarantee (SEG), makes it an attractive investment. Additionally, the long-term benefits, including potential increases in property value and reduced carbon emissions, further support the value of a 6kW solar system.

Find 6kW solar system installers near your area

Finding a local installer for your 6kW solar system can seem daunting. Hunting down reviews and sending emails, waiting weeks for a response. Well, it doesn’t have to be that hard!

With our simple form, in just a few clicks, you can access up to 4 free, no-obligation quotes from trusted local installers specialising in solar panel installation. Our network of professionals is ready to provide you with competitive quotes, ensuring you get the best deal suited to your needs. 

Experience a hassle-free process, from initial inquiry to installation. Get started now by clicking the link below.

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