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10 kW Solar System UK: Comprehensive Guide for Maximum Savings

In recent years, the United Kingdom has seen a substantial increase in the adoption of solar energy systems for both residential and commercial uses. Among the various sizes of solar systems available, the 10 kW solar panel system has emerged as a popular choice for many UK households and businesses. This renewable energy solution not only helps in reducing carbon emissions but also provides significant utility bill savings, making it an attractive investment for those looking to embrace a greener lifestyle.

A 10 kW solar system can deliver impressive performance, generating enough electricity to power a medium to large-sized property. Typically costing around £12,000, including installation and VAT, this system can save its owners up to £1,418 per year on their energy bills by utilising the solar energy generated. Covering approximately 70 square metres of roof space, these systems can produce up to 55 kW of energy on a good summer's day, contributing to the grid or reducing reliance on generators in off-grid installations.

Selecting a 10 kW solar system in the UK also means that homeowners can benefit from various government incentives and payouts, making the initial investment more manageable. By taking the time to research and compare providers, as well as considering factors such as panel efficiency, system size, and energy storage options, property owners can ensure they make the most of their solar investment for years to come.

10 kW Solar System Overview


A 10 kW solar system in the UK typically comprises of the following components:

  • 25 to 40 solar panels (each with a power rating of 250 to 400 watts)
  • Roof mounting system to securely attach the panels to the roof
  • An inverter to convert the direct current (DC) produced by the solar panels into alternating current (AC) for use in the home or grid


There are several advantages of installing a 10 kW solar system in the UK, such as:

  1. Significant electricity generation: A 10 kW solar system can produce approximately 9,268 kWh of electricity per year in the South of the UK, depending on the location, shading, roof direction and tilt, time of year, and efficiency of the components.
  2. Reduced dependency on grid electricity: Utilising solar power generated by a 10 kW system can help to lower the reliance on the grid and reduce electricity bills.
  3. Environmentally friendly: Solar systems produce clean, renewable energy, which contributes to reducing greenhouse gas emissions.
  4. Off-grid capabilities: For off-grid systems, a 10 kW solar array can significantly reduce generator run time, saving fuel costs and maintenance expenses.

In summary, a 10 kW solar system in the UK consists of several components, such as solar panels, mounting systems, and an inverter. They offer numerous benefits, such as significant electricity generation, reduced dependency on grid electricity, environmentally friendly energy production, and off-grid capabilities.

Installation Process

Site Assessment

Before installing a 10 kW solar system in the UK, the first step is to perform a site assessment. This process involves evaluating the available roof space, assessing the condition of the roof, and determining the direction and angle of the roof. It is essential to ensure that there is enough space for a 10 kW system, which typically requires between 440 and 475 square feet of roof space.

System Design

Once the site assessment is complete, the next step is to design the solar system. This involves choosing the appropriate solar panels, selecting an inverter, and deciding on the placement of the panels on the roof. The 10 kW solar system can generate up to 55 kW of energy on a good summer day.

Permits and Approvals

Before the installation can proceed, it is necessary to obtain the required permits and approvals from local authorities. This typically includes building permits and electrical permits, as well as any additional approvals that may be required for specific locations.


The actual installation process begins with the mounting of the solar panels on the roof. The installer will place the solar panels onto the mounting system without fully securing them just yet. Once they are satisfied with the panel positions and angles, the installer will tighten all the bolts and nuts to secure the panels in place.

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    After the panels have been securely installed, the next step is to wire the solar panels to the inverter. Wiring involves connecting the panels together in a series or parallel configuration, depending on the system design. Once the wiring is completed, the system is tested and commissioned to ensure it is operating efficiently and safely.

    In conclusion, the installation of a 10 kW solar system in the UK involves several key steps, including site assessment, system design, obtaining permits and approvals, installation, and commissioning. By following this process, a homeowner can ensure a successful solar system installation that provides reliable and sustainable energy for their home.

    Costs and Return on Investment

    Initial Investment

    A 10 kW solar system typically costs around £12,000 in the UK, including installation and VAT. The average cost for a solar PV system may vary between £1,400 and £1,750 per kWp of installed capacity, depending on the system size and complexity.

    Grants and Incentives

    Currently, there aren't any government grants available specifically for residential solar panel installations. However, the UK government offers incentives such as the Smart Export Guarantee (SEG) scheme for solar installations. Under this scheme, energy suppliers pay the solar installation owner for the excess electricity generated and exported to the grid. To be eligible for the SEG, your solar PV system size should not exceed 5 MW, and you must be using an approved installation company.

    Payback Period

    The payback period for a 10 kW solar system may vary depending on factors like location, electricity usage, and electricity rates. On average, a properly sized 10 kW solar system can save homeowners around £1,418 per year in electricity costs, and the typical UK family may see savings of up to £1,000 per year.

    Assuming a 10 kW solar system costs £12,000 and an annual savings of £1,418, it would take approximately 8.5 years (£12,000 / £1,418) to recoup the initial investment. It is essential to note that the payback period could be shorter or longer based on the factors mentioned earlier. Moreover, the lifespan of a solar system is typically over 25 years, so returns on investment can continue for many years after the initial payback period.

    Maintenance and Longevity

    Scheduled Maintenance

    Regular maintenance of a 10 kW solar system in the UK is essential for optimal performance and longevity. One of the main aspects of maintenance is cleaning the solar panels. It is recommended to have the panels cleaned every six months, which could cost between £4 and £15 per panel.

    Apart from cleaning, maintenance also includes checking the inverter and ensuring that there are no loose connections, damaged cables, or other issues. Homeowners can consider opting for yearly servicing to keep their systems running efficiently.

    Performance Monitoring

    Monitoring a 10 kW solar system's performance is crucial to ensure that it's producing the expected amount of energy and to identify any potential issues. Some systems come with built-in monitoring software, while others may require additional monitoring devices.

    Regularly checking the system's output and comparing it to previous months or years can help homeowners identify any potential issues, such as panel degradation or inverter failure, and address them quickly to minimise energy loss.

    In summary, maintaining and monitoring a 10 kW solar system in the UK is essential for optimising performance, minimising energy loss, and ensuring the system's longevity. Regular cleanings, yearly servicing, and performance monitoring can help homeowners get the most out of their investment.

    Case Studies

    5.2 kW Solar PV & 10 kW Battery Storage

    In this particular case study, a customer had a specific request for a leading make and model of PV Panel (Sunpower Maxeon 3/400) which was combined with a scalable 10 kW Puredrive Energy storage battery system, installed in the floored attic/loft.

    10 kW Solar System in the South of the UK

    A 10 kW solar system in the South of the UK produces, on average, 9,268.55 kWh per year. Factors that can influence the produced kWh include shading, location within the UK, roof direction and tilt, time of year, and efficiency of the components in the solar PV system.

    10 kW Off-Grid Solar System

    An off-grid 10 kW solar system in the UK requires additional components, such as battery storage, charge controllers, and inverters. These systems can provide a self-sufficient and sustainable energy supply for off-grid properties or remote locations.

    10 kW AC Storage System

    One case study involved the installation and commissioning of a 10 kW Puredrive II AC Battery, further demonstrating the integration of solar PV systems with battery storage solutions.

    Bentley Motors: Solar PV Rooftop Array

    The Bentley Motors Factory in the UK features the largest rooftop solar PV array in the country, with 20,000 solar PV panels generating a significant amount of electricity for the automotive manufacturing site.

    These case studies exemplify the varied applications and capabilities of 10 kW solar PV systems in the UK, as well as their potential benefits, such as energy cost savings and environmental contributions.


    A 10 kW solar system in the UK typically costs around £12,000, including installation and VAT. This investment can lead to annual savings of approximately £1,418 by utilising solar energy. The system usually requires 25 to 40 solar panels, occupying a roof space of about 446.875 - 715 sq. feet.

    The performance of a 10 kW solar system depends on the location within the United Kingdom. Sunnier regions, like the southwest, will generally produce more electricity than less sunny areas, such as parts of the north. The annual output of these systems ranges between 11,000 kWh to 15,000 kWh.

    The popularity of solar panels has grown in the United Kingdom, with the most recent data showing an increase in installed capacity of 2.4% since June 2021. A majority (79%) of new installations were 4 kW or under, indicating a strong demand for smaller systems.

    In conclusion, a 10 kW solar system represents a considerable investment with significant energy savings for UK households. The installation cost and energy production depend on location and system size, but the growing popularity and increased uptake of solar energy signify a positive shift towards renewable energy in the United Kingdom.

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    Mark McShane
    Content Writer
    Mark McShane is a seasoned professional in the solar industry and the owner of Skills Training Group, a leading provider of solar training and education. With years of experience in the field, Mark has developed a deep understanding of the latest trends, technologies and best practices in the industry. His expertise and passion for solar energy have helped countless professionals develop the skills and knowledge needed to succeed in the fast-growing field of solar energy. Whether you’re an aspiring solar professional or an experienced industry veteran, Mark is an excellent resource for anyone looking to enhance their skills and knowledge of the solar industry.
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