Solar Panel Installation Cost and How to Compare Quotes
By the EcoMatch editorial team · Published 10 October 2026 · Updated 10 October 2026 · 8 min read
In short
- Solar cost depends on system size, panel type, roof complexity and scaffolding needs, not just the number of panels.
- Energy Saving Trust publishes indicative price ranges; treat any single quoted figure as a starting point, not a guarantee.
- Comparing quotes properly means matching system size, equipment specification and warranty terms, not just the bottom line.
- A written, itemised quote protects you if something is missing, such as scaffolding or a consumer unit upgrade.
What actually drives the cost of a solar installation
The price of a solar PV installation is shaped by several factors working together. The headline one is system size, usually described in kilowatts peak (kWp), which reflects how many panels are fitted and their individual output. A larger system costs more upfront but can generate more electricity across the year.
Beyond panel count, the type of panel matters. Standard monocrystalline panels are common and cost-effective, while higher-efficiency or all-black aesthetic panels usually carry a premium. The inverter, which converts the direct current from the panels into usable alternating current for your home, is another significant cost item, and inverter quality affects both performance and lifespan.
Roof characteristics also influence price. A simple, single-pitch roof with easy access is quicker and cheaper to work on than a roof with multiple angles, dormer windows, chimneys, or limited access requiring more scaffolding. Tile type matters too, as slate roofs can take longer to fit flashing kits than standard concrete tiles.
Indicative price ranges, used carefully
Energy Saving Trust publishes general, non-binding guidance on typical solar PV costs by system size, which is a reasonable starting reference point when you begin researching. These figures move over time with material costs, labour rates and market demand, so always check the current published guidance rather than relying on older figures, and treat any number as indicative rather than a quote.
Because your own roof, location and chosen equipment will differ from any generic example, the only reliable way to know what your installation will cost is to get written quotes from installers who have surveyed your property.
Any cost figures referenced in this guide are for illustration only and should be verified against current published guidance and your own quotes.
Comparing quotes like-for-like
Two quotes that look similar on price can represent very different systems. Use a simple table to line up the specification details before comparing the final figure.
| Item | Quote A | Quote B |
|---|---|---|
| System size (kWp) | State value | State value |
| Panel make and model | State value | State value |
| Inverter make, model and warranty | State value | State value |
| Number of panels and layout | State value | State value |
| Scaffolding included? | Yes / No | Yes / No |
| Workmanship warranty length | State value | State value |
| MCS certified installer? | Yes / No | Yes / No |
Getting quotes you can trust
Ask each installer to provide a written, itemised quote rather than a verbal estimate. This should include the system size, equipment specification, estimated annual generation for your specific roof, and the warranty terms for both panels and workmanship. Confirm the installer is MCS certified, since this is usually required for Smart Export Guarantee payments and some financial schemes.
EcoMatch connects you with one approved installer per enquiry, who will survey your property and provide a specification matched to your roof rather than a generic estimate.
Practical takeaway
Treat any published cost figure as a general guide, then compare written, itemised quotes against each other on specification, warranty and installer certification, not just the final number.
Frequently asked questions
Is a cheaper quote always a worse system?
Not necessarily, but a lower price can sometimes mean a smaller system, lower-specification equipment, or missing items such as scaffolding. Always check the specification line by line before comparing price alone.
Should I get more than one quote?
Comparing more than one quote helps you understand what a reasonable specification and price look like for your property, and gives you a basis for asking follow-up questions.
Does a longer warranty mean a better product?
A longer warranty can indicate manufacturer confidence, but check whether it covers the panels, the inverter and the installer's workmanship separately, since these often have different terms.
Will my quote include ongoing costs?
Solar panels have low ongoing costs, but ask about inverter replacement timelines and any recommended maintenance checks so you understand the full picture, not just the installation price.
Sources (checked 10 October 2026)
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