March 31 2024

Mounting Solar Panels DIY Guide

Mounting Solar Panels – DIY Installation Guide for UK Homeowners

Introduction

Installing solar panels is a rewarding project for experienced DIY enthusiasts, self-builders and professional installers alike. Whether you’re fitting a small off-grid system, powering a caravan or motorhome, or installing a domestic rooftop solar PV system, choosing the correct mounting system and following good installation practices is essential for long-term performance and safety.

Successful installation starts with careful planning, choosing the correct mounting system and using roof-specific solar panel fixing kits. Every roof type requires a different approach, so selecting compatible mounting components is essential for long-term safety and performance.

At Dragons Breath Solar, we’ve supplied high-quality solar panel mounting systems, roof fixing kits and renewable energy equipment throughout the UK for over 20 years. Although we don’t install systems ourselves, we’re happy to help customers choose compatible equipment for domestic, commercial and off-grid projects.

New to solar. Start with our Solar Energy Guides, where you’ll find expert advice covering solar panels, mounting systems, battery storage and off-grid renewable energy.

Planning Your Solar Panel Installation

Before purchasing equipment, consider:

Roof type
Roof condition
Roof orientation
Roof pitch
Shading
Available installation area
Wind exposure
Future battery storage
Cable routes
Inverter location

Careful planning helps avoid unnecessary modifications once installation begins.

Every installation should begin with accurate measurements of the available roof or ground-mounted area. Modern solar panels are considerably larger than they were 20 years ago, with many measuring around 1,800 mm × 1,200 mm. Measuring the available space before ordering equipment will help determine the number of panels your property can accommodate and ensure you purchase the correct mounting system and fixing kit.

To understand how complete solar PV systems generate electricity, read our How Solar PV Systems Work guide.

Choosing the Correct Solar Panel Mounting System

The mounting system forms the structural foundation of every solar installation. Selecting the correct rails, brackets and roof fixings helps protect the roof while supporting the solar panels throughout their working life.

Depending on the installation, you may require:

Aluminium mounting rails
Roof hooks
End clamps
Mid clamps
Rail joiners
T-bolts
Stainless steel fixings
Flashing kits

Our Solar Panel Mounting Systems – Complete Guide explains how each component works together.

Choosing the Correct Roof Fixing Kit

Different roofs require different fixing systems.

Plain Tile Roofs

Use dedicated roof hooks designed for tiled roofs.

Browse Plain Tile Solar Panel Fixing Kits

Slate Roofs

Specialist slate brackets help protect fragile roof coverings.

Browse Slate Roof Solar Fixing Kits

Concrete & Pan Tile Roofs

Adjustable hooks accommodate varying tile profiles while maintaining rail alignment.

Browse Concrete & Pan Tile Solar Fixing Kits

Corrugated Roofs

Corrugated roofs generally require specialist fixing screws that attach directly into the roof structure.

Browse Corrugated Roof Solar Fixing Kits

Trapezoidal & Box Section Roofs

Mini rail systems offer fast installation with minimal roof penetrations.

Browse Trapezoidal Roof Solar Fixing Kits

Flat Roofs

Flat roof systems typically use ballasted or mechanically fixed frames to achieve the optimum panel angle.

Learn more in our Solar Panel Orientation – The Complete UK Guide.

Ground Mounted Systems

Where roof installation isn’t suitable, ground-mounted systems allow complete flexibility.

Learn more in our Off-Grid Solar Systems – The Complete UK Guide.

Choosing the Right Solar Panels

Not every solar panel is the same. Modern panels are available in a range of power outputs, dimensions and efficiencies, so it’s important to select panels that suit both your available roof space and your energy requirements.

Things to consider include:

Panel size
Wattage
Efficiency
Warranty
Weight
Appearance
Compatibility with your mounting system

Larger panels may reduce the total number of fixing rails required, while smaller panels can sometimes make better use of awkward roof layouts.

If you’re unsure which solar panel is suitable for your installation, browse our range of Solar Panels or read our How Solar PV Systems Work guide.

Installing the Mounting Rails

Once the roof brackets have been installed:

Check bracket spacing.
Install mounting rails.
Ensure rails are level.
Join rails where required.
Tighten all fixings to the manufacturer’s specification.
Check rail alignment before installing panels.

Accurate rail alignment makes installing the solar panels much easier.

Before permanently securing the rails, measure the mounting points on the rear of the solar panels. These dimensions determine the correct rail spacing. Taking the time to check these measurements before tightening the rails helps avoid unnecessary adjustments during panel installation.

Installing the Solar Panels

When lifting panels onto the roof:

Handle panels carefully.
Position each panel squarely.
Secure using mid clamps and end clamps.
Check cable routing.
Avoid trapping cables beneath panels.
Maintain manufacturer-recommended spacing.

Correct installation improves airflow around the panels, helping maximise efficiency.

Cable Management

Correct cable management is often overlooked, but it plays an important role in both the safety and longevity of a solar PV installation.

Good practice includes:

Supporting cables with UV-resistant clips.
Keeping MC4 connectors clear of the roof surface.
Avoiding sharp bends or excessive cable tension.
Preventing cables from sitting in standing water.
Keeping wiring away from sharp edges and moving components.

Proper cable management reduces the risk of abrasion, water ingress and premature cable failure while helping maintain a neat, professional installation.

Common DIY Installation Mistakes

Avoid:

Using the wrong roof brackets.
Mixing mounting system manufacturers.
Incorrect rail spacing.
Poor cable management.
Overtightening clamps.
Damaging roof tiles.
Ignoring roof loading.
Working in unsafe weather conditions.

For more installation advice, read our Solar Panel Fixing Questions & Answers guide.

Safety Considerations

Working on roofs presents significant risks.

Always:

Use suitable access equipment.
Wear appropriate PPE.
Follow working-at-height regulations.
Never work alone.
Check roof condition before installation.
Disconnect electrical equipment before wiring.

If you’re unsure about any aspect of installation, seek professional advice before proceeding.

Why Buy from Dragons Breath Solar

For more than 20 years, Dragons Breath Solar has supplied quality solar equipment throughout the UK.

We offer:

Solar Panel Mounting Kits
Solar PV Roof Fixings
Solar Panels
Solar Inverters
Battery Storage
Off-Grid Solar Equipment
Solar Cables & Accessories

Although we don’t install systems, we provide technical advice to help customers choose compatible products for their projects.

With more than 20 years’ experience supplying solar equipment throughout the UK, Dragons Breath Solar helps customers select compatible mounting systems, roof fixings and solar PV components for domestic, commercial and off-grid installations. While we don’t provide installation services, we offer expert product advice to help you choose the right equipment for your project.

Choosing the Right Solar Panel Position

Once the mounting system has been installed, careful positioning of the solar panels is essential. Leave suitable spacing around the array for ventilation and maintenance while ensuring the panels are securely clamped using the manufacturer’s recommended fixing points. Correct positioning helps maximise performance while reducing unnecessary stress on the mounting system.

Frequently Asked Questions

Can I install solar panels myself

Experienced DIY installers may be able to install mechanical mounting systems, but all electrical work should comply with current UK regulations.

What is the best roof for solar panels

South-facing roofs generally offer the highest energy generation, although east and west-facing roofs also perform well.

Do all roofs use the same mounting system

No. Every roof covering requires a fixing system specifically designed for its construction.

How long do solar mounting systems last

Quality aluminium mounting systems are designed to last for more than 25 years when installed correctly.

Should I future-proof my installation

Yes. Allowing space for additional panels or battery storage can make future expansion much easier.

Can I install solar panels on a garage

Yes, provided the garage roof is structurally sound and capable of supporting the additional weight of the solar panels and mounting system. Many homeowners choose to install solar panels on detached garages, workshops and outbuildings where there is good sun exposure. Before installation, check the roof construction and ensure you select a roof fixing kit designed specifically for the roof covering.

Can solar panels be fitted on a flat roof

Yes. Flat roofs require specialist mounting systems that raise the panels to an optimum angle for solar generation. Depending on the roof construction, these systems may be ballasted with weights or mechanically fixed to the building. Flat roof mounting systems also provide adequate airflow beneath the panels, helping to maintain performance and simplify maintenance.

What tools do I need

The exact tools required will depend on your roof type and mounting system, but most DIY installations will require a tape measure, spirit level, drill, socket set, torque wrench, spanners, screwdrivers and suitable access equipment such as scaffolding or a tower. Always follow the mounting system manufacturer’s installation instructions and use appropriate personal protective equipment (PPE) when working at height.

How many roof hooks do I need

The number of roof hooks depends on several factors, including the size of the solar array, panel dimensions, rail layout, roof construction and local wind and snow loading. Most mounting system manufacturers provide design guidance to determine the correct spacing and quantity of roof hooks. Using too few fixings can reduce the strength of the installation, so it’s important to follow the recommended design specifications.

What angle should solar panels be

In the UK, solar panels generally perform best when installed at an angle of around 30° to 40° and facing south. However, east and west-facing installations can also generate excellent results, particularly where electricity is used throughout the day. The ideal angle will vary depending on your roof design, location and energy requirements. For more information, read our Solar Panel Orientation – The Complete UK Guide.

Final Thoughts

Installing solar panels successfully starts with careful planning and choosing the correct mounting system for your roof. Using compatible rails, roof fixings and mounting components helps protect your property while providing decades of reliable renewable energy generation.

At Dragons Breath Solar, we’ve helped customers throughout the UK select compatible solar panel mounting kits and roof fixing systems for more than 20 years. Whether you’re installing a domestic rooftop system, commercial solar array or off-grid project, we’re here to help you choose the right products for your installation.

Need Help Choosing the Right Mounting System

Every solar installation is different. The correct roof brackets, mounting rails and fixing kit depend on your roof type, panel size and project requirements. If you’re unsure which products are suitable for your installation, the team at Dragons Breath Solar can help you select compatible equipment for a safe and reliable solar PV system.

Continue Reading

If you’re planning your own solar installation, these guides will help you through every stage of the project:

How Solar PV Systems Work – Understand how a complete solar PV system generates electricity.
Solar Panel Questions & Answers – Answers to the most common questions from homeowners.
Using the Correct Solar Panel Fixing Kit for Your Roof – Complete UK Guide – Choose the right brackets and fixing system.
Solar Panel Orientation – The Complete UK Guide – Learn how roof direction and pitch affect performance.
Solar Panel Mounting Systems – Complete Guide – Understand rails, hooks and mounting components.
Solar Panel Fixing Questions & Answers – Practical advice on brackets, rails and installation.
Off-Grid Solar Systems – The Complete UK Guide – Planning a remote power system
Solar Energy Guides – Explore our complete library of solar advice.

Ready to Build Your Solar Installation

Choosing the correct mounting system is one of the most important decisions when installing solar panels. Using compatible roof fixings, aluminium rails and quality mounting components will help ensure your installation remains secure and reliable for decades.

Whether you’re fitting a single panel to a garden office or installing a large domestic or commercial solar array, Dragons Breath Solar supplies roof-specific mounting systems, fixing kits and solar equipment for projects throughout the UK.

Browse our range of:

Whether you’re installing a single solar panel or a complete rooftop array, choosing the correct mounting system from the outset will make installation easier and help ensure reliable performance for years to come. If you need advice selecting compatible mounting components, the team at Dragons Breath Solar is always happy to help.