Introduction
Commercial ground mounted solar is one of the most effective ways for businesses to generate renewable electricity at scale while reducing long-term operating costs and improving energy resilience. Unlike rooftop solar, which is constrained by the available roof area and structural capacity of existing buildings, ground mounted solar systems utilise available land to create purpose-built solar power stations capable of supplying significant amounts of electricity directly to a business.
For organisations with surplus land and high daytime electricity consumption, commercial ground mounted solar often provides the lowest cost method of generating renewable electricity. When combined with private wire networks, battery energy storage and electric vehicle (EV) charging infrastructure, it can form the foundation of a long-term energy strategy that reduces reliance on the National Grid and improves financial performance.
This lesson explains how commercial ground mounted solar works, where it is typically installed and why an increasing number of manufacturers, logistics companies, industrial estates, local authorities and commercial property owners are investing in ground mounted solar PV systems.
What is a Commercial Ground Mounted Solar System?
A commercial ground mounted solar system is a photovoltaic (PV) installation built on land rather than on the roof of a building. Rows of solar panels are mounted onto engineered support structures that are fixed to the ground using driven piles, ground screws or reinforced concrete foundations depending on the site conditions.
The electricity generated is converted from direct current (DC) into alternating current (AC) by inverters before being supplied directly to the site’s electrical distribution system or exported to the National Grid.
Ground mounted solar systems are commonly installed on:
- Industrial land.
- Manufacturing facilities.
- Distribution centres.
- Business parks.
- Water treatment works.
- Universities.
- Hospitals.
- Airports.
- Local authority land.
- Agricultural land (subject to planning and operational requirements).
Unlike utility-scale solar farms that are developed primarily for electricity export, many commercial ground mounted solar installations are designed as private wire systems, where the electricity generated is consumed directly by the business, delivering significantly greater financial savings.
How Does Commercial Ground Mounted Solar Work?
Commercial ground mounted solar panels convert sunlight into electricity using photovoltaic cells.
The electricity generated follows a simple process:
- Solar panels generate direct current (DC) electricity.
- String inverters or central inverters convert DC electricity into alternating current (AC).
- Electricity is supplied to the site’s main electrical distribution system.
- Renewable electricity is consumed immediately by the business.
- Any surplus electricity may be stored within battery energy storage systems (BESS) or exported to the National Grid where permitted.
The financial performance of a commercial ground mounted solar installation depends largely on how much of the electricity generated is consumed on site.
Why Businesses Choose Ground Mounted Solar
Ground mounted solar offers several advantages over other forms of commercial solar installation.
Unlike rooftop solar, the system design is not constrained by roof size, structural loading or future roof maintenance. Larger systems can therefore be developed, allowing organisations with high electricity consumption to offset a greater proportion of their imported electricity.
Ground mounted systems also provide easier access for maintenance, cleaning and inspection, helping reduce operational costs over the lifetime of the installation.
Typical benefits include:
- Lower electricity costs.
- Lowest Levelised Cost of Energy (LCOE).
- Larger system capacities.
- Easy maintenance access.
- Greater design flexibility.
- Long operational life.
- Improved energy resilience.
- Reduced carbon emissions.
- Supports Net Zero strategies.
- Future integration with battery storage and EV charging.
Ground Mounted Solar vs Rooftop Solar
Both technologies generate renewable electricity, but each has different advantages.
Rooftop Solar |
Ground Mounted Solar |
Uses existing roof space | Uses available land |
Limited by roof size | Easily scalable |
Roof surveys required | Ground investigations required |
Structural loading considerations | Civil engineering required |
More difficult maintenance access | Easy maintenance access |
Typically lower installation cost | Lower lifetime generation cost at larger scale |
Limited future expansion | Straightforward future expansion |
The most appropriate solution depends on the available land, electricity demand and long-term business objectives.
Ground Mounted Solar vs Solar Canopies
Commercial solar canopies provide the additional benefit of covered parking and EV charging infrastructure, whereas ground mounted solar focuses on delivering the greatest renewable energy generation at the lowest cost.
For organisations with available land, ground mounted solar typically delivers:
- Lower capital cost per kWp.
- Simpler construction.
- Lower civil engineering costs.
- Easier maintenance.
- Greater scalability.
Solar canopies may provide additional value where covered parking or customer-facing infrastructure forms part of the wider business strategy.
Fixed Tilt Systems
The majority of commercial ground mounted solar installations in the UK use fixed tilt mounting systems.
These structures are engineered to optimise solar generation while minimising construction complexity and long-term maintenance.
The tilt angle and spacing between rows are determined during the design stage to maximise annual energy generation while reducing inter-row shading.
Single-axis tracking systems are available for certain applications but are less common within
UK commercial installations due to their increased complexity, higher capital cost and additional maintenance requirements.
Private Wire Solar
One of the biggest advantages of commercial ground mounted solar is the ability to operate as a private wire system.
Rather than exporting electricity to the National Grid, renewable electricity is supplied directly to the business through a dedicated electrical connection.
Private wire systems provide several advantages:
- Greater electricity savings.
- Reduced exposure to grid electricity prices.
- Lower transmission losses.
- Increased energy resilience.
- Improved investment returns.
For organisations with large daytime electricity demand, private wire solar often provides the strongest financial business case.
EPC Insight
The most successful commercial ground mounted solar projects are not designed to maximise installed capacity, they are designed to maximise financial return. Energy Gain analyses half-hourly electricity consumption data, future energy demand and grid constraints to determine the optimum system size, ensuring the electricity generated is utilised as efficiently as possible.
Typical Applications
Commercial ground mounted solar is suitable for a wide range of sectors.
Examples include:
- Manufacturing facilities.
- Food production.
- Distribution centres.
- Automotive manufacturers.
- Airports.
- Water treatment facilities.
- Universities.
- Healthcare estates.
- Industrial estates.
- Commercial property portfolios.
Each sector has different electricity demand profiles, influencing the most appropriate system size and electrical design.
Project Insight – Brownfield Petrochemical Site
Delivering this commercial ground mounted solar installation on a former brownfield petrochemical site required an innovative engineering solution due to strict restrictions on ground penetration. Conventional driven piles and ground screws were prohibited to avoid disturbing legacy contamination and underground infrastructure, so the entire ground mounted solar PV system was supported using a surface-mounted ballasted foundation comprising precast concrete ballast blocks.
The ballasted mounting system was engineered using detailed structural calculations to resist wind uplift, sliding and differential settlement across the uneven post-industrial ground. Working within a live petrochemical environment also demanded rigorous health and safety procedures, including specialist non-sparking equipment, hot-work permits and carefully planned above-ground cable containment to eliminate the need for excavation.
This project demonstrates how an experienced commercial solar EPC contractor can successfully deliver commercial ground mounted solar on technically constrained industrial sites. Through bespoke engineering, careful construction planning and innovative foundation design, Energy Gain delivered a safe, reliable and high-performing renewable energy asset without compromising the site’s operational or environmental constraints.
The image below details a commercial ballasted ground mounted solar system.
The image below shows a section drawing of commercial ballasted ground mounted solar system
Common Misconceptions
“Ground mounted solar is only suitable for solar farms.”
Not true. Many commercial ground mounted solar installations are developed specifically to supply electricity to a single business through a private wire connection.
“Ground mounted solar always requires agricultural land.”
Many successful projects are installed on brownfield land, industrial estates, business parks and unused commercial land.
“The biggest system always provides the greatest return.”
Not necessarily. Oversizing a system can increase electricity exports and reduce overall financial performance. The optimum system size is determined by detailed electricity consumption analysis rather than available land alone.
FAQs
How much land is required?
The land requirement depends on the system capacity, panel layout and spacing between rows. During the feasibility stage, Energy Gain assesses available land alongside electricity demand to determine the most appropriate solution.
Can commercial ground mounted solar be expanded in the future?
Yes. Where sufficient land and electrical capacity are available, many systems can be designed to allow future expansion.
Is planning permission required?
Most commercial ground mounted solar projects require planning permission. Requirements vary depending on the site, system size and local planning authority.
Can battery storage be added later?
Yes. Battery Energy Storage Systems (BESS) can often be integrated into the design either during the initial project or as part of a future expansion.
Key Learning Points
After completing this lesson you should understand:
- What commercial ground mounted solar is and how it works.
- The difference between ground mounted solar, rooftop solar and solar canopies.
- Why private wire systems often deliver the strongest financial returns.
- The typical applications for commercial ground mounted solar.
- How ground mounted solar supports long-term energy resilience and Net Zero strategies.
- Why the optimum system size is determined by electricity demand rather than simply the amount of available land.
Lesson Summaries:
- Lesson 1: What is commercial ground mounted solar?
- Lesson 2: Is your site suitable for ground mounted solar?
- Lesson 3: Building the financial business case
- Lesson 4: Engineering, construction, and grid connection
- Lesson 5: Operations, maintenance, and performance optimisation
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Ground mount cost and savings calculator
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