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Flat Roof Solar Panels

Lee Fellows
Discuss Flat Roof Solar Panels with Lee

Flat Roof Solar Panels by PV Plus

At PV Plus, we design and install flat roof solar PV systems for commercial, industrial, and public sector buildings across England. From schools and council facilities to logistics hubs and office blocks, our installations are tailored to meet your energy, structural, and compliance requirements.

We work with trusted mounting manufacturers to deliver low-load, non-penetrative solutions that maximise usable roof space without compromising safety or waterproofing. Whether your goal is Net Zero, SAP improvement, or ESG alignment, we help you turn your roof into a dependable energy asset.

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Maximise Generation for Net Zero Goals
Flat roofs offer ideal conditions for optimising solar panel tilt and orientation, helping you maximise kWp output and accelerate your journey to Net Zero.

Support ESG & Sustainability Targets
Installing solar is a visible and measurable step toward environmental commitments, helping you meet corporate ESG strategies and demonstrate climate leadership.

Protect Your Building & Budget
Ballasted systems avoid roof penetrations, preserving waterproofing and warranties — with no need for structural alterations.

Make Use of Unused Space
Turn an empty roof into an energy-generating asset, cutting electricity bills and reducing your reliance on the grid.

Future-Proof Your Energy Costs
By generating clean, on-site power, you gain control over long-term energy pricing — with clear financial and environmental ROI.

Who We Work With

We deliver flat roof solar installations for a wide range of commercial and public sector clients. Our projects span across:

  • Educational buildings – including schools, colleges, and universities
  • Government and council facilities – from local authority buildings to large estates
  • Ministry of Defence sites – where compliance, security, and safety are critical
  • Warehouses and Data Centres – optimising large roof spaces for clean energy
  • Office buildings – helping organisations meet Net Zero and ESG targets

We also work directly with:

  • Main contractors – integrating solar into new builds and refurbishments
  • Roofing contractors – as an approved solar partner for overlay or new roof systems
  • M&E contractors – providing solar packages that align with wider building services design

Flat Roof Solar Panels Installation Process

PV Plus designing a commercial solar panels installation

Using specialist design tools our team will design a Solar/Battery system to suit your energy needs and budget. You will be sent an initial design and an estimate of costs.If you are happy with our proposal we will arrange a site survey

Woman applying for Solar panel installation from PV Plus

Solar and battery installs will require a DNO application in advance of any works being started. Please take a look at our DNO APPLICATION page for the full details of this process. Once this is returned we will provide a quote based on any DNO requirements.

PV Plus team installing commercial solar panels on a building

PV Plus work on premium domestic projects and specialise in commercial installs across the South. We have been installing systems since 2011. As We are a MCS and NICEIC company you system will be fitted by qualified and experienced engineers

PV Plus team maintaining a commercial solar installation

Reputation is key and we pride ourselves on great customer service, we will always be at the end of the line to offer support and advice. We offer varying maintenance and monitoring services to ensure maximum returns from your investment by maintaining output efficiency.

We’re approved installers for leading Flat Roof Solar Panels systems

As an Approved Partner, PV Plus is trusted by leading roofing manufacturers to install solar on their roofs. This exclusive partnership reflects our proven expertise, reliability, and commitment to quality—giving you peace of mind that your solar installation is in the best hands. Check out our Partners page to see who else we work with.

Bauder solar array on a commercial building
FlatFix Fusion landscape
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Lightweight solar panels. Bio Solar
Solar panels being installed on Renusol mounting system on commercial building
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Frequently Asked Questions

Most flat roofs on commercial or public buildings are suitable for solar PV, but a few key factors need to be considered. These include the structural capacity of the roof (to support the weight of the system), available surface area, roof covering type, drainage layout, and shading from nearby buildings or plant equipment. Before any works begin you would need to instruct a structural engineer, to ensure the design is safe, effective, and compliant.
Not when properly designed and installed. Flat roof systems are typically ballasted or use non-penetrative mounting frames that sit securely without breaching the roof membrane. Where fixings are necessary (e.g. wind-prone sites), specialist mounting systems are used with waterproofing details that preserve the roof warranty. We always design with roof longevity in mind, and ensure future access for maintenance is protected.
The energy generation potential depends on your roof size, location, panel efficiency, and orientation. Even in the UK, a well-sized commercial PV system can generate tens to hundreds of thousands of kWh annually. For example, a 100kWp system might produce around 90,000 kWh/year. Solar is often one of the most cost-effective ways to reduce grid energy costs, cut carbon emissions, and support ESG targets — especially for businesses with high daytime electricity use.
For most commercial properties, rooftop solar falls under Permitted Development Rights, meaning no full planning application is needed — as long as certain height, setback, and visibility limits are met. However, listed buildings, conservation areas, and large-scale systems may still require planning. You’ll also need a G99 application for grid connection approval, which we handle on your behalf. Some insurers or leaseholders may request structural reports or fire risk assessments too.
Commercial solar PV systems typically last 25 years or more, with inverters often replaced around year 10–15. Flat roof arrays are low-maintenance but should be checked 1-2 times a year to ensure optimal performance, clean panels, and good cable and frame condition. We offer planned maintenance packages and detailed handover documentation to help you stay on top of system health and performance tracking.

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