Solar Panel Installation Quote UK: Costs, Comparisons and What to Check
A solar panel installation quote in the UK should give you much more than a price. A reliable quotation should explain what will be installed, expected electricity generation, everything included, applicable warranties and how potential savings were calculated.
This guide is for UK homeowners, landlords, renovators and EV owners comparing solar quotes. It covers typical 2026 costs, factors affecting price, equipment and installer comparisons, and questions to ask before signing. The goal is to help you choose a system suited to your roof, electricity use and future plans—not simply the cheapest package.
Quick Answer
A typical UK domestic solar PV system is around 4.5kWp and costs about £7,600, although smaller, larger or complex installations vary. A battery commonly adds around £5,000–£8,000. Your quote should include the panel and inverter models, system size in kWp, estimated annual generation in kWh, roof layout, scaffolding, electrical work, grid application, monitoring, warranties, payment schedule and total price. Compare at least three MCS-certified installers. Treat savings and payback as estimates because they depend on location, shading, household usage, electricity prices and export tariffs.
Solar panel quote comparison
| System | Typical installed price | Best for | Main consideration |
|---|---|---|---|
| 2–3kWp solar only | £4,500–£6,500 | Small homes | Limited generation |
| Around 4–5kWp solar only | £6,000–£9,000 | Typical family homes | Correct sizing |
| Around 4–5kWp plus battery | £11,000–£17,000 | Evening use and EVs | Battery value and warranty |
| Larger or complex system | From £9,000 solar only | Large homes or difficult roofs | Access, electrics and grid work |
These are budgeting ranges, not fixed prices. Energy Saving Trust currently places the average 4.5kWp domestic system at around £7,600 and a battery at roughly £5,000–£8,000. A property survey is required for an accurate quotation.
What affects a solar panel installation quote?
The panel count is only one part of the price. A competent installer should assess the following factors.
Roof size, direction and shade. A clear south-facing roof usually gives the strongest annual output. East- and west-facing roofs can still work well but may produce around 15–20% less than an equivalent south-facing array. Nearby trees, chimneys and buildings can also reduce generation.
Roof condition and material. Slate, fragile tiles, flat roofs and roofs needing repair can increase labour and mounting costs. It is generally better to repair an ageing roof before installing panels rather than paying to remove and refit the system later. Flat roofs may also require additional structural checks and weighted mounting equipment.
Scaffolding and access. Building height, conservatories, extensions, restricted access and panels installed across several roof elevations can change the cost. Confirm that safe scaffolding and access are included rather than left as an undefined extra.
Electrical work. Long cable routes, an outdated consumer unit, earthing upgrades or a detached garage may add cost. The quote should explain how unexpected remedial work will be handled.
System design. Premium panels, microinverters, power optimisers, hybrid inverters, batteries, EV chargers and bird protection affect the total. Extra equipment should address a genuine property or usage requirement rather than being added automatically.
What should a complete solar quote include?
Look for an itemised written proposal containing:
- Panel quantity, manufacturer, model, wattage and product warranty.
- Total array size in kilowatt peak, or kWp.
- Inverter model, rated output, proposed location and warranty.
- Battery model, usable capacity, power rating, warranty and location, when included.
- A roof layout showing panel position, orientation and identified shading.
- Estimated annual generation in kWh and the assumptions used.
- Expected self-consumption, export, savings and payback assumptions.
- Scaffolding, mounting, cabling, isolators, monitoring and commissioning.
- Distribution Network Operator paperwork.
- MCS certification, handover documents, workmanship protection and aftercare.
- Total price, VAT, deposit, stage payments, cancellation terms and exclusions.
Systems with an inverter capacity of up to 3.68kW per phase and larger systems follow different grid-connection processes, commonly referred to as G98 and G99. Your installer should identify the correct route and state whether approval is required before installation.
Qualifying domestic solar panel and battery installations are currently zero-rated for VAT until 31 March 2027. Under current legislation, the rate is scheduled to return to 5% from 1 April 2027. Confirm that the quotation applies the correct VAT treatment for your installation.
How to compare solar installers and equipment
Get at least three quotations based on broadly the same requirements. A cheaper quote is not genuinely cheaper if it excludes scaffolding, relies on unrealistic generation assumptions or leaves grid approval and electrical work unresolved. Energy Saving Trust also recommends obtaining quotes from at least three MCS-certified installers.
Verify the installer’s MCS certification rather than relying solely on a logo displayed on a website. Review the company’s trading history, insurance, customer feedback, workmanship protection and arrangements for aftercare.
Ask whether the roof and electrical work will be completed by employees or subcontractors. Using subcontractors is not necessarily a problem, but the quotation should make it clear who is responsible for installation quality, warranties and future faults.
Separate the panel product warranty from the performance warranty. A performance warranty normally covers the expected rate of panel degradation; it does not necessarily protect you against every manufacturing fault.
Also compare the inverter warranty. Energy Saving Trust says solar panels should last 25 years or more and suggests that an inverter may need replacing after approximately 12 years. An expensive extended warranty is not always better value than budgeting for a future replacement.
Avoid pressure selling, unexplained same-day discounts and vague “lifetime warranty” claims. Ask who legally backs every guarantee and what protection remains if the installer stops trading.
How to choose the right solar system
- Review your electricity use. Use at least 12 months of bills or smart-meter data. Note daytime demand, EV charging, electric heating and any planned changes.
- Assess the roof. Confirm usable area, direction, pitch, shading, structural condition and installation access.
- Size the system for value. A larger array can improve annual generation, but only when the roof, inverter and local grid connection can support it.
- Assess the value of a battery. A battery can store daytime generation for evening use, reducing grid imports. However, the additional saving must justify the battery’s price and likely replacement cycle.
- Plan for future demand. EV owners and households considering a heat pump should discuss inverter capacity, battery compatibility and potential consumer-unit upgrades.
- Challenge the savings assumptions. The calculation should distinguish between electricity used in the home and electricity exported. These units may have significantly different financial values.
- Compare whole-life costs. Include finance interest, monitoring subscriptions, optional warranty extensions and potential inverter replacement.
- Insist on a technical survey. Satellite imagery is useful for an initial estimate, but the final proposal should follow checks of the roof, electrics, access, shading and cable route. Homeowner discussions frequently identify unclear cable routes, omitted scaffolding and sales-led surveys as causes of concern.
Best system by household type
| Customer | Usually worth comparing | Why |
|---|---|---|
| Small household | Sensibly sized solar-only system | Lower cost and simpler payback |
| Family home | 4–5kWp, with and without a battery | Tests the value of storing power for evenings |
| EV owner | Larger array, smart charger and optional battery | More opportunity to use generation at home |
| Landlord | Durable solar-only design with monitoring | Simpler maintenance and tenant benefit |
| Home worker | Solar only or a modest battery | Higher daytime electricity consumption |
| Future heat-pump home | Maximum practical array and upgrade-ready electrics | Prepares for higher electricity demand |
Will solar panels save money, and what is the payback?
Solar savings come from buying less electricity from your supplier and receiving payment for exported electricity.
Under the Smart Export Guarantee, eligible small-scale generators in Great Britain can be paid for metered electricity exported to the grid. Energy suppliers set their own export rates, contract lengths and eligibility terms, so compare available tariffs rather than assuming a fixed export payment.
Using solar electricity in your home is often more valuable than exporting it. Timers, smart controls, daytime EV charging and a correctly sized battery can increase self-consumption. However, a battery is not automatically the best financial choice for every household.
Energy Saving Trust’s July 2026 examples indicate approximate payback periods of nine years in London, nine to ten years in Aberystwyth, ten to eleven years in Manchester and eleven to twelve years in Stirling, including export payments. Your result may differ because generation, tariffs, household behaviour and installation costs vary.
Solar panels continue generating during winter and cloudy weather, but output is lower than during longer, brighter summer days. A trustworthy quotation uses recognised generation calculations rather than promising year-round energy independence.
Why the installer matters
Good equipment can underperform when the survey, design or installation is poor. Panel positioning affects shade losses; mounting quality protects the roof; cable and inverter design affect safety and efficiency; and correct commissioning ensures that monitoring information is meaningful.
Most domestic rooftop installations are permitted development, but limits and local restrictions apply. Listed buildings, conservation areas, unusual mounting positions and certain flat-roof installations may require additional checks or permission. Planning rules also differ across the UK, so property-specific advice is important.
The installer should manage the relevant grid paperwork and provide the certificates needed when applying for an export tariff.
At handover, expect operating instructions, warranty documents, an electrical certificate, MCS documentation, grid paperwork, the final system layout and monitoring access. Confirm who will provide technical support if generation falls or the inverter displays an error.
Questions to ask before accepting a quote
- Is the price fixed following the technical survey?
- Are scaffolding and all known electrical works included?
- What annual generation is predicted?
- What shading and electricity-price assumptions were used?
- Why is this equipment suitable for my property?
- Can the battery or solar array be expanded later?
- Who handles planning checks, grid paperwork and MCS registration?
- What do the product, performance and workmanship warranties cover?
- Which export rate supports the payback calculation?
- Who installs the system and provides aftercare?
- What documents will I receive at handover?
Frequently asked questions (FAQs)
Clear answers about solar installation costs, comparing quotations, scaffolding, MCS certification, VAT, planning permission, winter performance and battery storage. Speak to Simple Green Energy .
Planning a solar installation?
Speak with Simple Green Energy about system size, installation costs, scaffolding, equipment, battery storage and the details that should be included in a property-specific quotation.
Discuss my solar installationConclusion
The best solar panel installation quote is not necessarily the lowest. It clearly connects your roof, electricity use and future plans to a suitable system, transparent price and realistic performance forecast.
Compare at least three MCS-certified installers, insist on an itemised proposal and technical survey, and challenge unclear exclusions or inflated savings claims. A well-designed solar system can generate electricity for decades, but the installer and system design are just as important as the panels.
Book a free home solar survey with Simple Green Energy for a tailored system design, savings estimate and fully itemised quotation.
