So, you're thinking about joining the solar revolution? Fantastic! Harnessing the power of the sun is a great way to save money on your energy bills,1 reduce your carbon footprint, and increase your home's value. But before you get carried away with thoughts of endless free electricity, there's one important question you’ll need to answer - is your roof suitable for solar panels?
Unfortunately, not all roofs are created equal. And when it comes to solar, there’s many factors that will determine whether it’s suitable for your home. In this blog, we’ll explain all you need to consider when deciding whether solar is right for you.
Learn more on how solar panels work.
Determining if your roof is suitable for solar panels.
There’s lots to consider when assessing your roof for solar. Important factors include the roof’s structure, orientation, pitch, shape and size. Only by considering these together will you get a good indication of your roof's solar potential. So let’s take a closer look at what you need to know.
Roof structure and material.
Understanding your roof's structure and material is a must. Solar panels add weight, so a robust framework is crucial to ensure good performance and long-term safety.
Common materials like asphalt shingles, metal, and tile are generally suitable, though specific considerations may apply (e.g. proper flashing for shingles, specialised mounts for tile). A professional installer can evaluate your roof's condition and load-bearing capacity to address any potential challenges before installation.
Roof age.
Your roof's age is also an important factor when considering solar panels. Ideally, you want to install panels on a roof with a good lifespan remaining to maximise your solar investment. Older roofs aren't necessarily a problem though, it's just even more important to have a thorough inspection carried out by a qualified roofing professional.
Best roof orientation for maximum sunlight.
To maximise the solar energy you generate, roof orientation is key. In the UK, south-facing roofs are ideal for capturing peak sunlight, while east-west facing roofs offer a more balanced energy production throughout the day.
It’s worth considering what your energy needs will be throughout the year, especially during shorter winter days, when evaluating the benefits of solar.
Ideal roof pitch for solar efficiency.
While a steeper roof pitch (ideally 30-40 degrees) generally improves solar panel efficiency in the UK, adjustments can be made during installation to optimise performance on roofs with less ideal angles.
Modern panel technology and installer expertise can maximise your solar potential even with variations in pitch or east-west facing roofs.
Solar panels on a flat roof.
Despite lacking a natural angle, flat roofs are surprisingly suitable for solar panel installations. Specialised mounting systems allow for optimal tilting and flexible positioning to maximise sunlight capture and minimise shading, often surpassing pitched roofs in efficiency. Plus, flat roofs offer easier access for installation and maintenance.
Effect of shading on solar panels.
Shading from trees, chimneys, or buildings can significantly reduce solar panel efficiency by obstructing direct sunlight. To optimise performance, assess your roof for potential shade throughout the day and year. Solutions include trimming overhanging branches, strategic panel placement, and using micro-inverters to mitigate the effects of partial shading.
Space and size requirements for solar panels.
Accurately determining usable roof space is important for solar panel installation. While rough estimates can be made, online tools and professional consultations using satellite imagery offer more precision, considering factors like pitch and orientation.
A professional MCS installer can analyse your energy needs and optimise panel placement to maximise efficiency while navigating roof obstructions like vents and skylights.
Don’t worry if your roof has an unusual shape with dormer windows or multiple levels, experienced installers can usually work around these features. They might use different panel sizes, adjust the layout, or even install panels on different sections of the roof to maximise your solar potential.
Roofs are unsuitable for solar.
Some roofs aren't suitable for solar panels. Thatched roofs pose a fire risk, and asbestos roofs are dangerous to drill into. Roofs in bad condition or heavily shaded may also not be appropriate. If your roof is very small or unusually shaped, it might limit your options. It's always best to consult a professional installer to assess your specific roof.
Structural and planning considerations.
Before installing solar panels, ensure your roof is structurally sound and can support the extra weight. While planning permission is generally not required in the UK, it's best to check local regulations.
Prioritise safety by using certified installers and schedule regular solar maintenance to ensure optimal performance and longevity of your solar panel system.
Do solar panels have to be on the roof?
No. Solar panels aren't just for roofs! While rooftops are most common, you can also put them on the ground, integrate them into your building's design, or even install them on a carport. And if those options don't work, you could consider joining a community solar project.
How to proceed with a rooftop solar installation.
If you feel your roof is suitable for solar, the next steps are simple. Begin by contacting a reputable solar panel installer for an assessment and personalised quote. They will evaluate your roof, energy needs, and budget to recommend the best system for you.
Getting solar panels installed is a 6-step process:
First contact. Get a quick quote and discuss the best solar options for your home.
Technical survey. One of our experts will visit your property to assess your roof and electrical system.
Arranging installation. We’ll handle the design checks and grid connection applications, then schedule your installation.
Scaffolding. This will be erected for safe roof access.
Installation. Our MCS certified installers will fit your solar panels, inverter, and battery (if you’ve bought one).
After installation. We’ll show you how to use your system and send you all necessary documentation including certificates and warranties.
If you’re thinking about going solar, it’s worth seeing how E.ON Next can help. We can give you an initial consultation and quote, then guide you through the entire solar installation process from assessment to installation and beyond.
Maintaining your solar panels.
Once your solar panels are up, looking after them is pretty simple! Solar panels are low maintenance and rarely need cleaning. You can even monitor their performance using the E.ON Home app.
Want even more piece of mind? It’s worth knowing that all our solar panels come with 30 year performance warranties. Learn more about solar maintenance and cleaning.
Join the solar revolution.
At E.ON Next we’re all about making new energy work. Assessing your roof's suitability for solar panels is an important first step in your journey towards clean energy independence.
We hope that by considering the factors we’ve discussed, you’ll feel empowered to make an informed decision about whether solar panels are right for you. Here’s to brighter energy and a brighter future for all.