Solar Farms in the UK

Solar farms represent a pivotal part of the UK’s shift towards renewable energy generation. These large-scale installations are transforming how Britain produces electricity, moving beyond individual rooftop systems to utility-scale power generation that feeds directly into our national grid. Understanding what solar farms are, how they work, and their role in the UK’s clean energy future can help you appreciate the broader context of solar investment.

If you’re considering solar for your home or business, knowing how these utility-scale projects fit into the national energy landscape gives you valuable context. For professional solar panel installation tailored to your property, contact our team of MCS-certified installers.

Key Takeaways

• UK solar farms now total over 17.6 gigawatts of installed capacity as of 2026
• Solar farms typically range from 5MW to 500MW in size, occupying between 50 and 5,000 acres
• The largest UK solar farm is Cleve Hill Solar Park in Kent, with a capacity of 350MW
• Planning permission for solar farms involves careful assessment under National Policy Statement EN-3
• Solar farms use multiple revenue models, including Contracts for Difference and power purchase agreements
• Community solar schemes allow UK homeowners to invest directly in solar farm projects
• Modern solar farms increasingly adopt agrivoltaics, allowing farmland to continue productive use
• The UK government aims to reach 70GW of installed solar capacity by 2035

What Are Solar Farms?

A solar farm is a large-scale photovoltaic power plant that generates electricity at utility scale, typically supplying energy directly to the national grid. Unlike domestic rooftop systems that serve individual homes or businesses, solar farms serve entire communities and contribute to the nation’s energy supply.

These installations range dramatically in size. The smallest utility-scale solar farms operate at around 5 megawatts, occupying roughly 50 acres of land. The largest in the UK reach 350 megawatts or more, requiring several thousand acres. Most farms you’ll see across England, Scotland, Wales, and Northern Ireland fall somewhere between these extremes, typically between 20MW and 100MW.

What distinguishes a solar farm from other large solar installations is its primary purpose: wholesale electricity generation for profit rather than self-consumption. The electricity these farms produce flows into the UK’s high-voltage transmission grid, managed by National Grid ESO, where it’s distributed to homes and businesses across the country.

Current UK Solar Farm Capacity and Growth

As of April 2026, the United Kingdom has installed over 17.6 gigawatts of solar capacity across all sectors (utility-scale farms, commercial rooftops, and domestic installations). This represents a remarkable growth trajectory over the past decade. In 2015, the UK had barely 5GW of total solar capacity, meaning the industry has more than tripled in just over a decade.

Utility-scale solar farms account for approximately 55 percent of this capacity, making them the dominant form of solar deployment in the UK. The remainder is split between commercial and industrial rooftop installations (25 percent) and domestic residential systems (20 percent).

This growth shows no sign of slowing. The UK government’s mandate to reach net zero emissions by 2050, coupled with the Sixth Carbon Budget requiring a 78 percent reduction in emissions by 2035, has created a favourable policy environment. The government’s target of 70GW of installed solar capacity by 2035 means that solar farm development will accelerate significantly over the next nine years.

Largest Solar Farms in the UK

Cleve Hill Solar Park near Faversham in Kent stands as the UK’s largest operational solar farm, with a capacity of 350 megawatts. This massive installation covers approximately 2,000 acres and can generate enough electricity to power around 117,000 homes. The project required over five years of planning, environmental assessment, and community consultation before construction began.

Shotwick Solar Park in North Wales represents another major installation, with a capacity of 96 megawatts spread across 430 acres. This farm produces approximately 89 gigawatt-hours of electricity annually, offsetting emissions equivalent to taking around 20,000 petrol cars off the road.

Other significant installations include Westmill Solar Park in Oxfordshire (40MW), Burbo Bank Extension offshore wind farm (though not solar), and numerous farms between 10MW and 50MW distributed across agricultural regions in East Anglia, the Midlands, and southern Scotland. These farms represent billions of pounds in investment and demonstrate the private sector’s confidence in UK solar economics.

The UK Planning Process for Solar Farms

Building a solar farm requires navigating a complex planning framework. Unlike domestic solar installations, which typically require only prior approval notification, utility-scale solar farms need full planning permission and environmental impact assessment.

The process begins with site identification. Developers typically target agricultural land that’s either lower grade (Classes 3b and 4 under the Agricultural Land Classification system) or poorer-quality grazing land. National Planning Policy Framework guidance generally discourages solar farm development on the best agricultural land (Classes 1 and 2), though exceptions exist for particularly strategic sites.

National Policy Statement EN-3 sets the framework for energy infrastructure planning in England, establishing that the need for renewable energy is compelling. This statement gives councils guidance on how to weigh applications favourably when they demonstrate genuine renewable energy benefits. However, councils must still consider local impacts: landscape effects, shadow flicker on nearby properties, ecological disruption, and cumulative effects with other installations in the area.

The Environmental Impact Assessment (EIA) is a critical document. This covers soil surveys, ecological assessments (particularly important during breeding seasons), landscape and visual impact assessments, flood risk assessments, and traffic impact during construction. Developers must consult the public, local councils, and statutory bodies like Natural England before submitting their formal application.

Community benefit agreements have become increasingly important. Large solar farms often include commitments to local communities: education and training programmes, local employment during construction and operation, annual community fund contributions (typically £5,000 to £20,000 per megawatt per year), or supporting local energy initiatives.

How Solar Farms Connect to the National Grid

Once electricity is generated by the solar panels, it flows through inverters that convert DC to AC current, then through medium-voltage cables to a substation on or adjacent to the farm. From there, it’s fed into the local distribution network, which connects to larger transmission lines managed by National Grid ESO.

Getting a grid connection requires an agreement with the local Distribution Network Operator (DNO). The UK has fourteen DNOs, each responsible for a geographic region. The DNO assesses the application, determines whether grid reinforcement is necessary, and quotes a connection cost. For large solar farms, these costs can range from £500,000 to several million pounds depending on the distance to suitable connection points and local grid capacity.

Grid connection also involves queue position. Given the surge in renewable energy applications, DNO queues can extend years into the future. Some farms approved for planning in 2023 or 2024 still await connection offers, meaning they cannot generate revenue-earning electricity despite their physical construction being complete.

Revenue Models for Solar Farms

Solar farm economics depend entirely on how the electricity is sold. The most common models are Contracts for Difference (CfD), power purchase agreements, and merchant exposure.

Contracts for Difference, administered by the UK government’s auction system, guarantee developers a minimum price for electricity over 15 years. Developers bid competitively, offering to accept the lowest strike price. The government pays the difference if wholesale prices fall below the agreed level. Recent CfD auctions have seen solar farms win contracts at strike prices between £35 and £50 per megawatt-hour, making utility-scale solar one of the cheapest forms of electricity generation in the UK.

Power purchase agreements (PPAs) involve long-term contracts directly with large commercial buyers (factories, data centres, supermarket chains) or aggregators. These typically run 10 to 20 years and lock in a fixed price, providing revenue certainty without depending on government support.

Some farms operate without long-term contracts, selling electricity into the wholesale market at whatever the prevailing price is each half-hour. This merchant approach is riskier but allows flexibility and can be lucrative when wholesale prices are high.

Community Solar Investment Schemes in the UK

UK residents interested in solar investment beyond their own rooftops can participate in community solar schemes. These cooperative models allow members of the public to invest in solar farms, receiving returns based on electricity generation.

Community-owned solar farms operate across the UK, with notable examples including the South West Solar Association and various council-backed initiatives. Investment returns typically range from 2 to 6 percent annually, depending on the farm’s location and performance. Returns are usually distributed quarterly or annually to investors.

These schemes offer a tangible way to support renewable energy whilst generating financial returns. Minimum investments often start at £500 to £1,000, making participation accessible to a broad range of people. Community solar also strengthens local engagement with clean energy, creating support networks for energy transition initiatives across the UK.

Agrivoltaics and Biodiversity Benefits

One of the most important recent developments in UK solar farm practice is agrivoltaics, where solar panels are mounted high enough to allow farming to continue beneath and around them.

Traditional solar farms essentially take land out of food production for the 25 to 30-year operational lifetime of the installation. However, agrivoltaic designs mount panels at least 2 to 3 metres above ground level, allowing sheep grazing to continue underneath. This dual-use approach maintains agricultural productivity whilst generating renewable electricity.

Grazing sheep beneath panels offers practical benefits too. The animals maintain vegetation growth (eliminating costly grass cutting), whilst the panels provide shelter during extreme weather. Environmental assessments increasingly favour agrivoltaic designs, and some planning authorities now expect them as standard for new farm proposals.

Solar farms can also benefit biodiversity in other ways. Installing wildflower borders around panels, creating wildlife corridors, and phasing installation to protect breeding birds during nesting season all enhance local ecology. Several UK solar farms now serve as de facto nature reserves, with botanical and entomological surveys showing increased species richness compared to conventional intensive agriculture on the same land.

Case Study: A South West Farming Community Embraces Solar

Background

A 200-acre farming operation in rural Devon had been struggling with declining revenues from conventional cereal production. Soil quality had degraded over decades of intensive cultivation, and global commodity price fluctuations made year-to-year income unpredictable. The farming family recognised that diversification was essential to long-term viability.

Project Overview

In 2021, the farm owner approached a solar development company about leasing 80 acres for a 12MW agrivoltaic solar farm. The proposal involved mounting panels 2.5 metres high, allowing sheep grazing to continue across the entire site. The project required Environmental Impact Assessment, community consultation, and planning permission from the local council.

Implementation

Planning permission was granted in late 2022, with conditions including a community benefit fund of £60,000 annually. The farm secured a 15-year power purchase agreement at £45 per megawatt-hour. Construction took six months, completed in mid-2023. Grid connection, however, faced a 18-month queue, preventing revenue generation until early 2025.

Results

Once operational, the solar farm generates approximately 10,000 megawatt-hours annually, providing steady income of around £450,000 per year. This revenue has been transformative, allowing the farm to upgrade infrastructure, invest in soil improvement, and employ a full-time environmental steward. The remaining 120 acres continue conventional crop production, further diversifying income. The annual community fund has funded local school STEM education, supported village hall refurbishment, and contributed to a local renewable energy education programme.

Expert Insights From Our Solar Panel Installers About Solar Farm Development

One of our senior solar panel installers, with over 15 years of experience in renewable energy, shared insights on the broader context of solar farm development: “The scale difference between utility-scale farms and residential installations is dramatic, but the fundamental technology is identical. What we’re seeing across the UK is a recognition that both are essential. Homes and businesses need on-site generation for energy security and cost savings, whilst farms provide the grid stability and wholesale volume that makes the whole system work. The UK’s 70GW target for 2035 is achievable only if both residential and utility-scale capacity grow simultaneously. What excites me about agrivoltaic farms is that they demonstrate solar and agriculture aren’t enemies. When designed properly, they enhance both.”

Frequently Asked Questions

Summing Up

Solar farms have become a cornerstone of the UK’s renewable energy transition. With over 17.6 gigawatts installed and a government target of 70 gigawatts by 2035, these utility-scale installations will continue growing at pace. The combination of declining technology costs, supportive policy frameworks, and increasingly sophisticated designs like agrivoltaics make solar farms economically compelling and environmentally responsible.

Whether you’re interested in investing in community solar schemes, understanding how the grid gets powered, or planning solar installation for your own property, knowledge of how utility-scale solar contributes to the broader energy system is valuable. For residential or commercial solar installation tailored to your specific needs and roof conditions, our team of MCS-certified installers can assess your property and provide expert guidance.

Updated April 2026