Solar Panel Installation Cost Guide
Installing solar panels typically costs between GBP 4,000 and GBP 9,000 for a UK home, depending on system size, roof layout, equipment quality, and whether battery storage is included. This guide covers realistic 2026 price ranges, the main system options, what affects cost, common extras, and what to check before hiring an installer.
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Quick Cost Summary
Prices are indicative and vary by location, property type, and specification. Always get at least three quotes.
Types of Solar Panel System
Standard On-Roof Solar PV
This is the most common domestic setup in the UK. Panels are fixed above the existing roof covering on rails, which keeps installation costs lower than more integrated systems.
Pros
- Usually the cheapest way to install solar
- Quickest installation for a standard roof
- Works well on most pitched roofs
- Easier to maintain or replace later
Cons
- Panels sit visibly above the roofline
- Not ideal for every property style
- Output can suffer if the roof has shading
Best for: Most standard UK homes looking for the best balance of cost, payback, and simplicity
In-Roof Integrated Solar
Panels are built into the roof rather than mounted above it. The finished look is cleaner and more flush, but installation is usually more complex and more expensive.
Pros
- More streamlined appearance
- Can suit new roofs or major reroofing projects
- Less visual projection above the roof surface
Cons
- Higher installation cost
- More roof work involved
- Less practical for a simple retrofit
Best for: Homeowners already replacing a roof or prioritising aesthetics over the lowest upfront cost
Ground-Mounted Solar Array
Where roof space is limited or unsuitable, panels can be installed on frames at ground level. This can give more flexibility on orientation, but it needs outdoor space and extra groundwork.
Pros
- Useful when the roof is shaded or poorly oriented
- Can be positioned for strong sun exposure
- Easier access for cleaning and maintenance
Cons
- Needs enough garden or land space
- Usually more expensive than roof-mounted systems
- Groundworks and trenching can add cost
Best for: Properties with suitable land where the roof is not the best location for solar
The best solar setup depends on your roof, budget, and whether you want the cleanest look, the lowest upfront cost, or the strongest long-term performance.
What Affects the Cost
- System size in kWp and the number of panels required
- Roof orientation, pitch, and shading from nearby buildings or trees
- Roof height, access difficulty, and scaffolding requirements
- Panel efficiency, inverter type, and overall equipment quality
- Whether battery storage is being installed at the same time
- Length of cable runs and any consumer unit or electrical upgrade work
- Whether the system is on-roof, in-roof, or ground-mounted
- Regional labour rates and installer availability
Labour Cost Breakdown
Labour is typically 30–50% of the total installation cost. The complexity of the job determines how long it takes.
What Is Usually Included
- Solar panels, mounting rails, and fixings
- Inverter and standard isolation equipment
- Basic installation labour and commissioning
- Standard wiring between roof array and inverter position
- System testing and handover
- MCS paperwork and DNO notification where applicable
Extra Costs to Expect
These aren't always required, but it's worth knowing about them before you get quotes.
Running Costs & Potential Savings
A typical well-sited 3.5 to 4kWp system can make a noticeable dent in annual electricity costs, especially if you use more power during the day. Savings and payback depend on roof performance, how much solar power you use directly, export payments under the Smart Export Guarantee, and whether a battery is added.
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Get Free QuotesWhat to Check Before Hiring
Use this checklist when getting quotes to make sure you're hiring the right person at the right price.
- Confirm the installer is MCS certified
- Ask for a written generation estimate based on your roof and postcode
- Check whether scaffolding is included in the quoted price
- Confirm exactly which panel and inverter brands are being supplied
- Ask whether battery storage is included, optional, or excluded
- Check if the quote includes MCS paperwork and DNO notification
- Ask what warranties apply to panels, inverter, workmanship, and monitoring
- Confirm what aftercare and fault support you get after installation
Frequently Asked Questions
How much does it cost to install solar panels in the UK?
For most homes, a standard domestic solar PV system falls somewhere in the mid four figures. Smaller systems can start around GBP 4,000, while larger or more complex installs can exceed GBP 9,000.
What size solar panel system does a typical home need?
A lot of UK family homes end up with a system around 3.5 to 4kWp, but the right size depends on roof space, electricity use, budget, and whether you plan to add a battery or EV charger.
Are solar panels cheaper if I already have scaffolding up for roof work?
They often can be. If access equipment is already in place for a reroofing or other major job, you may reduce part of the installation cost.
Does adding a battery make solar panels much more expensive?
Yes. Battery storage can add several thousand pounds to the total price, but it may help you use more of the electricity you generate rather than exporting it straight to the grid.
Do I need planning permission for solar panels?
In many cases, domestic solar panel installations fall under permitted development, but exceptions can apply for listed buildings, conservation areas, or unusual installations. Always check if you are unsure.
Do solar panels still work on cloudy days?
Yes. Output is lower than on bright sunny days, but solar panels still generate electricity in daylight and on overcast days, which is why they can still work well in the UK.
Should I use an MCS certified installer?
Yes. MCS certification is important because it helps confirm the system has been installed to recognised standards and is usually needed if you want access to Smart Export Guarantee payments.
How long do solar panels last?
Solar panels are typically designed to last for decades. Many systems still produce useful output well beyond 20 years, although performance gradually reduces over time.
What usually affects the final solar panel quote the most?
The biggest cost drivers are usually system size, roof complexity, access and scaffolding, equipment choice, and whether you are also adding battery storage or electrical upgrades.
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