Solar Panel Quote UK: Compare Costs & Installers (2026)
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Quick Answer: What Should a Good UK Solar Panel Quote Include?
A good solar panel quote should identify the exact system being proposed and the complete installed price. It should show the panel quantity and model, total system size in kWp, inverter, any battery, roof layout, estimated annual generation in kWh, shading assumptions, scaffolding, electrical work, DNO responsibilities, warranties and exclusions.
For an MCS installation, a property-specific performance estimate should be provided before the contract is awarded. MCS Certified In Great Britain, qualifying installed solar panels currently benefit from 0% VAT until 31 March 2027. GOV.UK
Compare at least three written quotations and examine the assumptions as carefully as the headline price. Energy Saving Trust and RECC both recommend getting three quotes.
Solar Panel Quote UK: How to Compare Costs, Systems and Installers in 2026
Getting a solar panel quote in the UK is not simply about finding the lowest price. A useful quotation should tell you what system you are buying, how much electricity it is expected to generate, what installation work is included and which assumptions sit behind any savings figures.
That matters because two quotes with similar headline prices can describe very different installations. One may include scaffolding, a stronger inverter specification and necessary electrical work. Another may leave some of those items as extras.
Generation estimates can also vary. A larger forecast is not automatically better if it ignores shading, roof orientation or realistic system losses.
For context, Energy Saving Trust currently puts the cost of an average home solar panel system at around £7,600. Energy Saving Trust Your actual quotation may be higher or lower depending on the property, system size, equipment and installation complexity.
This guide explains how to request and compare solar quotes on a like-for-like basis, what should be confirmed before you sign and which warning signs deserve closer attention.
Ready to investigate prices for your property? Use Get Free Quote to describe your project and compare suitable quotations without obligation.
How Much Does a Solar Panel System Cost in the UK?
Energy Saving Trust currently gives an average home solar PV installation cost of around £7,600. Energy Saving Trust solar panel guidance
Treat that figure as a useful benchmark, not a fixed market price. A genuine quotation should reflect your property and proposed installation.
The main price factors include:
- system capacity and number of panels
- panel and inverter specification
- roof type and access
- scaffolding requirements
- cable routes and electrical work
- monitoring equipment
- battery storage
- roof repairs or structural work where needed.
In Great Britain, qualifying solar panels supplied and installed in residential accommodation are currently zero-rated for VAT until 31 March 2027. Northern Ireland has different rules, so the quote should show the correct VAT treatment for the property. GOV.UK VAT guidance for energy-saving materials
An initial desktop estimate can help you budget. However, the final specification and price should reflect the findings of an appropriate property survey.
If you want to understand what happens after quotation, see our solar panel installation process guide.
What Should Be Included in a Solar Panel Quote?
The easiest way to compare installers is to ask each one to provide the same core information.
| Quote item | What to check |
|---|---|
| Solar array | Panel make, model, wattage, quantity and total kWp |
| Inverter | Make, model, rating, type and warranty |
| Battery | Usable capacity, power rating, warranty and separate price |
| Roof design | Panel layout, orientation, pitch and shading |
| Performance | Estimated annual generation in kWh and self-consumption assumptions |
| Installation | Mounting, scaffolding, cables, protection, monitoring and making good |
| Grid connection | Responsibility for the applicable DNO notification or application |
| Warranties | Panel, inverter, battery and workmanship cover |
| Certification | MCS status where applicable and expected handover documents |
| Commercial terms | Total price, VAT, deposit, payment stages, exclusions and quote validity |
Exact equipment matters. “Ten panels and an inverter” does not give you enough information to compare value, expected performance or warranties.
If you are comparing different panel specifications, our best solar panels UK guide explains the main criteria in more detail.
How to Compare Solar Panel Quotes Properly
First, compare systems of similar capacity. A 3.5kWp proposal and a 5kWp proposal are not like-for-like simply because they are both described as “home solar systems”.
Check panel quantity, individual panel wattage and total array capacity.
Next, compare annual generation estimates. If two installers propose similar systems but one predicts substantially more electricity, ask what causes the difference.
Then examine the complete installation scope. Does the price include scaffolding? Is electrical work included? Who handles the grid connection paperwork? Are monitoring equipment and commissioning included?
A cheaper quote becomes less attractive when essential items appear later as extras.
You should also separate the equipment decision from finance claims. Even when finance is available, ask for the underlying cash price.
For more detail about system capacity and predicted generation, see our solar panel output UK guide.
How to Judge Generation and Savings Estimates
A credible solar forecast starts with your property rather than a generic national figure.
The current MCS Solar PV Installation Standard requires an annual generation estimate and self-consumption calculation before the contract is awarded. The estimate considers factors including system capacity, location, roof orientation, inclination and shading. MCS Certified
MCS also makes clear that predicted performance is an estimate rather than a guarantee because solar radiation varies between locations and years. MCS Solar PV Installation Standard MIS 3002
Savings calculations should distinguish between:
- electricity generated by the panels
- solar electricity used directly in your home
- surplus electricity exported to the grid.
This distinction matters because self-consumed electricity replaces power you would otherwise buy, while exported electricity receives an export tariff.
Ask which electricity price, household consumption and export tariff have been assumed. If the proposal gives a payback period, you should be able to understand how it was calculated.
Should You Add a Battery to Your Solar Quote?
Battery storage can increase the proportion of solar electricity you use yourself. However, a battery should not automatically be bundled into every proposal.
Ask for its usable capacity, charge and discharge power, efficiency, warranty and operating strategy.
Most importantly, request two comparisons:
- solar panels without battery storage
- the same solar system with the proposed battery.
This shows what the battery adds to the initial price and the estimated financial return.
Energy Saving Trust also notes that batteries can potentially charge when grid electricity is cheaper, depending on your tariff and equipment. Energy Saving Trust
If you expect to add an EV charger, heat pump or battery later, tell the system designer before accepting the quote. Future electricity use can affect sensible equipment choices.
MCS, the Smart Export Guarantee and Paperwork
MCS is the main UK quality-assurance scheme for small-scale renewable technologies.
For solar PV installations up to 50kW, Ofgem says households applying for the Smart Export Guarantee will normally need an MCS certificate or equivalent evidence that the installation and installer are suitably certified. Ofgem
You can read more about the checks involved in our MCS-certified solar installers UK guide.
The Smart Export Guarantee (SEG) allows eligible small generators in Great Britain to receive payments for electricity exported to the grid. Suppliers set their own tariff rates, contract lengths and conditions, although compliant SEG tariffs must pay above zero. Ofgem Smart Export Guarantee guidance
Therefore, an installer should not present one particular export rate as guaranteed indefinitely.
Red Flags in a Solar Panel Quotation
Be cautious when a seller will not provide the specification, performance forecast or exclusions in writing.
Other warning signs include:
- savings figures with no stated assumptions
- pressure to sign immediately
- an apparently “free” battery with no separate cash price
- unclear panel or inverter models
- vague warranty information
- significant work left “to be confirmed” while the price is presented as final
- unusually large upfront payments.
The Renewable Energy Consumer Code recommends at least three quotations and advises consumers not to pay more than 25% of the contract price upfront, while checking that the deposit is protected. RECC consumer guidance
Uncertainty itself is not necessarily a warning sign. Roof condition, structural concerns or unusual electrical work may genuinely need further investigation. The important point is that potential changes should be identified and explained.
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Energy Saving Trust currently estimates that an average home solar panel system costs around £7,600. Actual quotations vary according to system size, roof access, equipment and installation requirements. Energy Saving Trust
Aim for at least three quotations. Both Energy Saving Trust and RECC recommend comparing three installers rather than relying on a single proposal. Energy Saving Trust
It should show the system size, exact panels and inverter, roof design, annual generation estimate, installation scope, scaffolding, electrical work, warranties, certification, exclusions and total price.
Not necessarily. Compare equipment, installation scope, generation assumptions, warranties and exclusions alongside price.
In Great Britain, qualifying installed solar panels in residential accommodation are currently zero-rated until 31 March 2027. Northern Ireland has different VAT rules. GOV.UK
MCS is not simply a brand comparison criterion. For solar PV installations up to 50kW seeking Smart Export Guarantee payments, Ofgem says an MCS certificate or equivalent certification will normally be required. Ofgem
kWp describes the rated capacity of the solar array under standard test conditions. kWh measures the amount of electricity generated or consumed over time.
Treat it as an informed estimate rather than a guarantee. MCS requires property-specific performance estimates while warning that annual sunlight and therefore output can vary. MCS Certified
Only when you want to evaluate it. Ask for separate solar-only and solar-plus-battery prices so you can judge the additional cost independently.
Do not assume it is. Ask the installer to state clearly whether scaffolding and any unusual access arrangements are included.
They are procedures associated with connecting electricity-generation equipment to the distribution network. Your installer should identify the appropriate route for the proposed system and explain who manages the process.
Eligible generators in Great Britain can receive export payments through the Smart Export Guarantee. Individual suppliers determine tariff rates and terms. Ofgem
It depends on the property and location. Many conventional rooftop installations in England qualify as permitted development subject to conditions, while listed buildings, designated areas and installations elsewhere in the UK require specific checks. Legislation.gov.uk
Yes, if the survey identifies legitimate changes to the scope. Any revised price, system specification or contract terms should be explained and confirmed in writing.
There is no single universal period. Check the expiry date shown by the installer and request an updated quotation if equipment prices or the proposed specification change.
What to Do Before Accepting a Solar Quote
Put your preferred quotation beside the alternatives and compare each important field line by line.
Confirm the final system size, exact panels and inverter, generation forecast, total price, VAT treatment, scaffolding, electrical work, grid responsibilities, warranties, payment schedule and exclusions.
Any verbal promises that influenced your decision should appear in the written agreement.
If battery storage is proposed, compare it with the solar-only option. If projected savings look unusually strong, check the assumed electricity price, export rate and level of self-consumption.
You should also know what happens after installation, including commissioning, monitoring setup, electrical certification, MCS documentation where applicable and warranty registration.
The most useful solar panel quote is not simply the cheapest. It is one that lets you understand what you are buying, what is included, what the system is expected to produce and which assumptions could change the financial outcome.
Ready to compare solar panel quotes? Gather written proposals for your property and compare the specification, scope and assumptions before committing.
