In the last decade, the UK warehousing sector has undergone a huge transformation, driven by the rise of e-commerce, supply-chain restructuring, and consumer demand for rapid delivery. Solar for warehouses has never been more important and beneficial.
From food to fashion, warehousing has rapidly become one of the most strategically important parts of the UK economy. Modern warehousing requires vast footprints, 24/7 operations and increased automation, meaning they consume more power than ever before. Pair this with the increasing demand for sustainability and this poses a significant challenge for warehouse operators. The good news is that rooftop solar PV is one of the most scalable and cost-effective opportunities for warehousing available.
A sector built for solar
According to the UK Warehousing Association (UKWA), the UK’s warehousing capacity has grown an astonishing 61% since 2015, now totalling nearly 700 million ft² of floorspace. *This expansion has been fuelled by the surge in online retail and the need for more regional distribution hubs and fulfilment centres. UKWA’s research shows that just the top 20% of the largest warehouses provide around 75 million m² of rooftop area, capable of supporting up to 15 gigawatts (GW) of solar capacity. That alone would double the UK’s existing installed solar PV capacity, an extraordinary opportunity for clean energy.
*UK Warehousing Association. (2024). The size and make-up of the UK warehousing sector. Savills.
The financial upside: a £3 billion opportunity
Energy remains one of the largest operational costs for warehouse operators, especially highly automated facilities. Rooftop solar across the warehousing sector could cut around £3 billion in electricity costs every year.
- It could reduce UK carbon emissions by around 2 million tonnes annually.
- Solar-equipped warehouses could become net producers of clean electricity, exporting surplus to the grid or sharing it locally.
*UK Warehousing Association, Investment Case for Rooftop Solar Power in Warehousing report.
Benefits of rooftop solar for warehouses
#1 Lower energy costs
Warehouses can cut electricity expenses by generating their own power on-site, making them less dependent on the grid and insulated from volatile energy prices.
#2 Energy independence
On-site generation provides a more reliable energy supply, which is particularly valuable during power outages.
#3 Environmental benefits
Installing solar panels reduces carbon footprint, helping companies to meet corporate social responsibility and sustainability targets.
#4 Improved brand image
A commitment to renewable energy can improve reputation with customers, investors, and partners who value sustainability.
#5 Utilising unused space
Warehouses can turn unused roof space into a revenue-generating asset that creates value without affecting daily operations.
Only 5% of warehouses currently have solar.
The UKWA notes several barriers to entry which include grid connection costs, regulatory hurdles, lack of awareness and uncertainty around incentives for tenants and landlords. However, with falling costs, better technology and improvements in installation, efficiency, mounting and integration, there has never been a better time to invest.
For warehouse owners, developers, landlords, and logistics operators, the business case is strong: lower energy bills, greater operational resilience, increased asset value, and major carbon reductions.
But how does a warehouse actually go from the idea of solar to a fully operational system? Here at DMB Solar our friendly and experienced team are on hand to guide you through the process.
What to expect from the process
Below is a complete breakdown of the five project stages every commercial solar project moves through.
#1 Pre-Feasibility Stage- understanding whether solar is viable for your site.
The pre-feasibility stage is about asking the right questions early, quickly identifying whether your site is a strong candidate for solar, and making initial assumptions on cost and performance.
The pre-feasibility stage includes a rooftop assessment, which involves things such as a desktop suitability review, an assessment of your usable roof area, any materials, pitch, orientation and shading (chimneys, neighbouring buildings) and age and condition of the roof. There will also be a full energy assessment completed, which reviews your historic energy consumption, identifies peak demand periods, your operational demands and an estimate of solar energy that can be consumed on site. Finally, our team will check your local grid constraints and identify whether export is viable and if there are any potential limitations.
From this study, we will be able to give you a ballpark budget estimate, annual generation and high-level ROI and payback period. If the numbers look good, we will move to the feasibility stage.
#2 Feasibility Stage- detailed technical, structural & financial information
The feasibility stage provides a full technical and commercial picture and includes elements such as an on-site survey, structural analysis of the roof, cable route planning, logistics considerations and electrical considerations.
In addition, it will also include an application for grid capacity, export permissions, financial modelling and timelines, so that you have a clear picture of what to expect.
#3 Design & consent stage – from technical drawings to approval
Once the feasibility is complete and approved, the project moves into a formal design and consents stage.
This includes things like a detailed system design, panel layout drawings, cable, roof fixing and mounting system plans and planning and regulatory consents. It also covers landlord/tenant agreement structuring, fire officer consultation and health and safety planning, to mitigate risk.
#4 Installation & commissioning
The installation stage is carefully coordinated to avoid impacting warehouse operations, which is particularly important in 24/7 logistics environments.
This stage includes agreeing the programme of works, access, working hours and site restrictions and of course the installation stage which covers roof preparation, mounting systems, panel installation, cabling and inverters and of course, testing. Once live, the system begins generating power immediately.
# 5 Operation, maintenance & servicing
After installation, the system enters a long operational life, often 25-30 years, depending on the system and servicing schedule.
We carry out routine solar panel servicing, maintenance and reactive repairs on installations, provide a solar panel monitoring solution, which gives performance alerts, monthly reporting and energy savings reports. In addition, we also carry out annual electrical inspections, panel cleaning and inverter replacement planning.
Warranties & integration
Typical warranties for panels can be 25-30 years, inverters 10-15 years and mounting systems 20-25 years. We can also integrate additional systems such as EV charging, carports and battery storage .
If you want a practical example of how our client made significant savings by installing solar PV, you can read our case study here.
With huge rooftops, rising energy demand, and clear sustainability pressures, the opportunity to turn warehouses into clean-energy generators has never been greater.
Your rooftop is an opportunity, contact us today.
