Integrated Solar Panels Explained: Costs, Pros & Cons
Integrated solar panels are a type of solar system built directly into the roof structure itself, sitting flush with the surrounding roof tiles rather than mounted on top of them. This gives a much sleeker, more discreet appearance than standard rooftop panels, though it comes with its own set of costs and considerations.
This guide covers everything UK homeowners and landlords across Southern England, Greater London, the South West, and South Wales need to know before choosing integrated solar panels for their property.
What Are Integrated Solar Panels?
Integrated solar panels are solar panels designed to replace a section of the roof covering itself, rather than being fixed on top of existing tiles or slates like a standard rooftop system.
Also known as in-roof or building integrated photovoltaics (BIPV), this approach means the panels form part of the actual weatherproof layer of the roof, sitting flush with the surrounding tiles for a much neater, low profile finish.
They’re particularly popular on new builds, extensions, and properties in conservation areas where a bulky, visibly mounted panel system might not be appropriate or permitted.
How Do Integrated Solar Panels Work?
Integrated solar panels work in exactly the same way as standard solar panels when it comes to generating electricity, converting sunlight into usable power through photovoltaic cells, but they’re fitted differently so they double up as the roof covering rather than sitting on top of it.
Special mounting trays and flashing kits are used to seal the panels into the roof structure, keeping the property watertight while also allowing the panels to generate electricity as normal.
Because they sit flush rather than elevated, integrated panels can run slightly warmer than standard mounted panels, which can very marginally affect efficiency compared with a panel that has ventilation underneath it.
What Are the Pros and Cons of Integrated Solar Panels?
Integrated solar panels offer a distinctly different look and installation approach compared with standard rooftop systems, and this brings both benefits and drawbacks worth considering. Here’s a clear breakdown of both sides.
Pros
- Sleek, flush appearance that blends seamlessly into the roofline
- Often more acceptable in conservation areas and on period properties where standard panels may be restricted
- Doubles as a functional part of the roof covering, useful on new builds and full re-roofing projects
- Can add strong kerb appeal and property value for buyers who dislike the look of standard mounted panels
Cons
- Higher upfront cost than standard mounted panels of the same capacity
- Can run slightly warmer, which may marginally reduce efficiency compared with elevated standard panels
- More complex installation, meaning fewer installers have genuine experience fitting them correctly
- Repairs or replacements can be more involved since panels form part of the weatherproofing layer
How Much Do Integrated Solar Panels Cost?
Integrated solar panels typically cost between £250 and £450 per panel, with a fully installed system costing somewhere in the range of £1,600 to £2,400 per kW of capacity, depending on roof complexity and the installer chosen. The table below gives a general guide to what different system sizes tend to cost once installation is included.
| System size | Est. installed cost |
|---|---|
| 3kW | £4,800-£7,200 |
| 4kW | £6,400-£9,600 |
| 5kW | £8,000-£12,000 |
| 6kW | £9,600-£14,400 |
| 10kW | £16,000-£24,000 |
How Many Integrated Solar Panels Do I Need?
The number of integrated solar panels you will need depends on your property size, average electricity use, and whether your goal is to power your whole home or simply offset part of your bill while staying connected to the grid.
| Property type | Typical annual usage | Recommended system size | Approx. panel count |
|---|---|---|---|
| Small terraced or semi-detached house | 2,000-2,700 kWh | 3kW-4kW | 10-13 panels |
| Larger detached family home | 4,000-5,000 kWh | 6kW-10kW | 20-33 panels |
| Whole-home independence (with battery) | Varies, typically higher usage | Larger system, sized to usage | Higher panel count, plus battery storage |
| Grid-connected, bill offset only | Any usage level | Smaller, well-positioned array | Lower panel count |
A smaller terraced or semi-detached property in areas like Bristol or Southampton using around 2,000 to 2,700 kWh a year might only need a 3kW to 4kW system, roughly 10 to 13 integrated panels, to make a real difference to the electricity bill.
A larger detached family home using closer to 4,000 to 5,000 kWh a year, especially one with an electric vehicle or electric heating, would typically need a 6kW to 10kW system, meaning anywhere from 20 to 33 panels depending on individual panel output.
Homeowners wanting to power their whole house independently generally need a larger system paired with battery storage, while those happy to stay grid connected and simply reduce their monthly bill can often achieve strong results from a smaller, well positioned integrated array.
How Are Integrated Solar Panels Installed?
Integrated solar panels are installed by removing a section of the existing roof covering and replacing it with a specialist mounting tray system that holds the panels flush within the roof structure, sealed with flashing to keep the property fully weatherproof.
This process is more involved than a standard rooftop installation, since it effectively combines roofing work with solar installation, and it typically takes longer to complete as a result.
It’s particularly well suited to new build projects or full re-roofing jobs, where the integrated system can be planned in from the start rather than retrofitted onto an existing, ageing roof covering.
How Long Do Integrated Solar Panels Last?
Integrated solar panels typically last 25 to 30 years, similar to standard panels, though their performance and lifespan depend heavily on the quality of the initial installation and flashing work, since any weak point in the seal can lead to water ingress over time.
Most manufacturers offer performance warranties covering 25 years or more, guaranteeing the panels will continue generating a high percentage of their original output well into later years. Because integrated panels also function as the roof covering itself, keeping them well maintained matters just as much for protecting the property as it does for solar performance.
What Properties Are Best Suited to Integrated Solar Panels?
Properties best suited to integrated solar panels are new builds, extensions, and homes undergoing a full re-roofing project, since this is when fitting panels into the roof structure is most practical and cost effective.
Period properties, listed buildings, and homes in conservation areas across places like Oxford and Bath also suit integrated panels well, given their discreet appearance often satisfies stricter planning requirements that standard mounted panels might not.
Properties with an existing roof in good condition but no imminent re-roofing plans may find standard mounted panels a more practical and cost effective choice, since integrated systems generally work out better value when combined with roofing work that’s happening anyway.
Do You Need Planning Permission for Integrated Solar Panels?
You generally don’t need planning permission for integrated solar panels on most residential properties, since they typically fall under the same permitted development rights that apply to standard rooftop solar installations across England and Wales.
Exceptions apply for listed buildings and properties within conservation areas, though integrated panels are often more likely to gain approval in these cases precisely because of their discreet, low profile appearance compared with standard mounted systems.
It’s still worth checking with your local council before starting any work, particularly if your property has specific heritage protections.
How Do I Know if My Roof Is Suitable for Integrated Solar Panels?
You’ll know if your roof is suitable for integrated solar panels by having a qualified installer assess the roof’s structural condition, pitch, and remaining lifespan, since fitting integrated panels onto a roof covering that will need replacing again soon isn’t a sound investment. Roofs already scheduled for replacement or new build roofs still under construction are ideal candidates, since the integrated system can be built in as part of that work.
A proper site survey will also confirm the roof’s orientation and sun exposure, just as it would for a standard installation, to ensure the integrated system will generate meaningful electricity.
What Maintenance and Servicing Is Required for Integrated Solar Panels?
Maintenance and servicing required for integrated solar panels is broadly similar to standard panels, involving occasional cleaning and periodic inspection of the electrical components, though extra attention should be paid to the flashing and seals around the panels given their role in keeping the roof weatherproof.
Because any issues with integrated panels can potentially affect the roof’s watertightness, it’s worth having them checked as part of a wider annual roof inspection rather than treating solar maintenance as entirely separate from general roof upkeep. Choosing an installer experienced specifically in integrated systems reduces the likelihood of problems arising in the first place.
Will I Need a Solar Battery for Integrated Solar Panels?
You won’t necessarily need a solar battery for integrated solar panels, since they generate and feed electricity into your home or export it to the grid through the Smart Export Guarantee just as effectively as standard panels without any storage at all.
Adding a battery does let you store surplus electricity generated during the day and use it in the evening, which generally improves the overall financial return of any solar system, integrated or standard. Whether a battery makes sense depends on your household’s usage patterns and how much surplus electricity you’d otherwise be exporting rather than using yourself.
Are Integrated Solar Panels Right for Your Property?
Choose integrated solar panels if…
- You’re building a new home or planning a full re-roofing project
- You live in a conservation area or listed building where a discreet appearance matters for planning approval
- You want a sleek, seamless roofline without visible mounted panels
- You’re happy to invest more upfront for a longer term aesthetic and property value benefit
Do not choose integrated solar panels if…
- Your existing roof is in good condition with no re-roofing plans in the near future
- Budget is your main priority and standard mounted panels would meet your needs
- You want the widest choice of installers and panel technology available
- You need the system installed quickly, since integrated installations generally take longer
Get a Free Integrated Solar Panel Quote From EE Renewables
If you think integrated solar panels could be the right fit for your property, EE Renewables provides expert solar panel installation and battery storage installation across Southern England, Greater London, South West England, and South Wales, covering London, Brighton, Oxford, Southampton, Bristol, and Cardiff. Our team will assess your roof condition, plans, and budget properly to confirm whether an integrated system makes sense for your specific situation.
Get in touch today for a free quote tailored to your location, and find out if integrated solar panels are the right choice for your home.
Frequently Asked Questions
Are integrated solar panels heavier than standard mounted panels?
Integrated solar panels are not necessarily heavier than standard mounted panels, but the overall roof structure needs to support both the panel and the mounting tray system that replaces the original roof covering. A structural check as part of the site survey confirms whether any additional support is needed.
Can integrated solar panels be installed on an existing roof without replacing the whole roof?
Integrated solar panels can be installed on a section of an existing roof without replacing the whole roof, provided the surrounding roof covering is in good condition and compatible with the mounting tray system being used. Many installers recommend combining this with any planned partial re-roofing work to keep costs more manageable.
Do integrated solar panels come in different colours or styles to match roof tiles?
Integrated solar panels are available in a range of finishes, including black and dark grey options designed to blend closely with common UK roof tile colours, though exact matching to specific tile styles isn’t always possible. Discussing appearance preferences with your installer before ordering helps ensure the best possible visual match.
Is it more difficult to sell a house with integrated solar panels compared with standard panels?
Selling a house with integrated solar panels is generally not more difficult than with standard panels, and many buyers view the discreet appearance as a positive feature rather than a drawback. Providing clear documentation of the installation, including warranties and MCS certification, helps reassure buyers during the sale process either way.
Can integrated solar panels be combined with roof windows or skylights?
Integrated solar panels can be combined with roof windows or skylights, since installers design the layout around existing roof features to maximise available space for solar generation while keeping the roof fully weatherproof. Careful planning at the design stage ensures both the skylights and solar panels function properly without compromising the roof’s integrity.
