When installing a solar PV system, choosing the correct mounting kit is just as important as selecting the right panels or inverter. Mounting systems secure your panels safely, optimise performance and ensure compliance with UK building and wind-loading standards.
This guide explains the most common mounting kits used in domestic and commercial installations across the UK.
On-Roof Mounting Systems
On-roof mounting is the most common system for residential installations. Panels sit just above the existing roof covering, fixed to rails attached by hooks or brackets. On-roof mounting kits are best for pitched roofs covered with tile, concrete or slate.
Key Components:
- Roof hooks or brackets
- Mounting rails
- Module clamps (mid and end clamps)
At SolarTherm UK, new for 2026, we are installing double powder coated, all black aluminium rails, perfect for coastal areas in the South East that are hit with a higher level of salt that can corrode traditional mounting rails.
Pros:
- Cost effective and widely compatible
- Lower visual impact
- Fast installation
Cons:
- Slightly reduced airflow compared to open frame systems
- Requires lifting or cutting roof tiles for hooks (depending on roof type)
In-Roof (Integrated) Mounting Systems
In-roof systems replace part of the roof covering, with panels sitting flush to the surface. Integrated mounting systems are best for new build properties, re-roofing projects or homeowners looking for an aesthetically pleasing finish.
At SolarTherm UK we install GSE in-roof mounting system, which fits over 95% of solar PV panels available in the UK, including the AIKO N-Type Neostar panels that we install at SolarTherm UK.
Pros:
- Excellent aesthetics; panels look like part of the roof
- Improved weather sealing with integrated trays
- No need for tile cutting or roof hooks
Cons:
- Slightly lower ventilation can reduce panel efficiency
- Higher installation cost
- Requires compatible panel and frame specifications
Flat Roof Mounting Systems
Flat roof solar mounting systems use wither ballast (weighted blocks) or mechanical fixings to keep panels secure at a chosen tilt angle. At SolarTherm UK we use a ballast weighted system for flat roof installations, ensuring no damage is caused to your flat roof.
Pros:
- Ideal for commercial buildings, garages and out buildings
- Flexible tilt angles
- Minimal roof penetration with ballasted setups
Cons:
- Ballast adds significant weight – structural checks are required
- Requires wind load analysis
Ground Mount Systems
Ground mounts position panels on frames secured directly into the ground. There are two main styles, A-frame racking and pole mounts. At SolarTherm UK we use A-frame racking for our ground mounted systems to create a smart and tidy array. A ground mounted system would be used for larger properties with large open land and limited roof space, with a high electricity spend.
Pros:
- Best airflow and cooling which is good for panel efficiency
- Easy cleaning and maintenance
- Orientation and tilt can be optimised for maximum generation
Cons:
- Requires available land
- Higher material and installation costs
- Ground works needed
- More cabling will be needed and trenches dug to route the electrics back to your consumer unit
Tracking Mounting Systems
Trackers rotate your solar panels throughout the day to follow the sun. These can be used on ground mounted systems and will optimise your solar panels for maximum output. While a tracking mounting system can be used for smaller residential arrays, they are very expensive and the costs far outweigh the financial benefits. Tracking systems are far more suited to large commercial or ground mounted solar farms.
Pros:
- Can increase energy yield by 20-40%
- Maximises generation in UK winter months
Cons:
- Higher maintenance and cost
- Rarely used for domestic properties
Which Mounting System Does SolarTherm UK Recommend?
At SolarTherm UK, we tailor the mounting system to your property and installation.
- Domestic homes: on-roof or in-roof systems on a pitched roof
- Flat roofs: ballast weighted mounting systems
- Commercial sites and large properties: ground mounted A-frame systems
We always perform a structural assessment and ensure full compliance with UK MCS standards and wind and snow loading regulations.
Need Expert Advice?
Our technical surveyors can determine the ideal mounting system for your roof type, budget and energy goals. Contact SolarTherm UK today for a free, no obligation quote and design, tailored to your property, usage and future energy needs. No hard sell, just honest, expert advice.
Your home. Your energy. Your future.
