Solar Panel Installer Warrington (an independent guide) › Guides
Reading a solar panel quote, line by line
Solar quotes in Warrington come in every format, from a one-page price to a forty-page brochure. The numbers that matter are the same in all of them. This guide goes through a quote line by line and says what to look for in each.
1. The price, broken down
A single figure for "4 kW solar system, fitted" tells you nothing you can compare. Ask for the price split into equipment, scaffolding, installation labour and electrical work, plus any extras such as bird mesh, a battery or roof repairs. The solar installation should show VAT at 0% (until 31 March 2027); roof repairs are charged at the standard rate. Divide the total by the system size to get the price per kW, and compare it with the 2025/26 North West averages: about £1,800 per kW up to 4 kW and £1,627 for 4 to 10 kW.
2. The panels
You should see the make, model, wattage of each panel and how many there are. Multiply the wattage by the number to check the system size: ten 430 W panels make 4.3 kWp. Look the model up and check its datasheet for the product and performance warranties and the dimensions: will they fit your roof as drawn?
3. The inverter
The inverter turns the panels' direct current into the alternating current your house uses. The quote should name the make and model and its rating in kW. Two questions matter: is it a hybrid that can take a battery later, and what is its warranty? It is the part most likely to need replacing during the panels' life.
4. The mounting kit
The rails, clamps and roof hooks that hold the panels on should be named, with the kit's MCS 012 certificate, which covers wind uplift and weathertightness for pitched-roof kits. Ask how the hooks will pass your roof covering: concrete tiles, clay tiles and slate each need different handling.
5. The predicted output
MCS installers must give an estimate of the system's yearly output worked out by the MCS method for your roof, including a shading factor. For a south-facing Warrington roof at 35°, PVGIS gives about 938 kWh per kW a year before shading; east or west roofs about 757 at 30°. An estimate far above those figures needs explaining. Be wary of any savings figure that does not show the tariff and the share of electricity you are assumed to use yourself.
6. The grid paperwork
Every system must be notified to, or approved by, the local electricity network operator. Systems that can export no more than 3.68 kW per phase are connected and then notified under G98; larger ones need a G99 application and approval first, which can take weeks and may come with an export limit. The quote should say which applies and that the installer will handle it.
7. The warranties
Expect separate warranties for the panels (product and performance), the inverter, any battery, and the installer's workmanship. The workmanship warranty is the one to probe: is it insurance-backed, so that it survives if the firm closes, and who is the insurer? Consumer code members (RECC or HIES) must offer protection for deposits and advance payments.
8. The deposit and payments
The quote or contract should say how much deposit is asked, how it is protected, and when the rest is due. Paying the balance after installation and handover of the certificates protects you best. Under consumer law you can usually cancel a contract agreed in your home within 14 days.
Putting it together
Lay two or three quotes side by side and compare price per kW, predicted output per kW, equipment and warranties. Our quote checker does the arithmetic and lists anything missing; the vetting guide covers the registers to check before you sign.
Where to go next
Where these figures come from
- MCS standards and tools library (MIS 3002, MCS 012)
- DESNZ: solar PV cost data, 2025/26
- PVGIS 5.3, European Commission Joint Research Centre
- HMRC VAT Notice 708/6: the zero rate on installed solar panels and batteries
- SP Energy Networks: connecting to the grid
- Renewable Energy Consumer Code (RECC)
- HIES consumer code
- Ofgem: Smart Export Guarantee
Questions about quotes
What should a solar panel quote include?
An itemised price; the make, model and wattage of the panels; the inverter make and model; the mounting kit and its MCS 012 certificate; a predicted yearly output by the MCS method with shading stated; the grid notification or application; every warranty; and the deposit and payment stages.
What does kWp mean on a quote?
Kilowatt-peak: the system's rated power under standard test conditions. A 4 kWp system can make 4 kW in ideal sunshine. In Warrington each kWp makes roughly 750 to 940 kWh a year depending on the roof direction.
Should a quote show VAT?
Yes. Installed solar panels and batteries in homes are zero-rated until 31 March 2027, then 5%. Any roofing work in the same quote is charged at the standard rate and should be shown separately.
Got a solar quote you are not sure about?
Send us the figures, or the question on your mind, with your Warrington postcode. The message comes to SEO-DONS LTD, the company behind this independent guide, and we answer by email. There is no charge and no obligation of any kind.
What happens next
- Fill in the form; a full postcode tells us which part of the borough you are in.
- We look at what you sent and answer by email, with the figures and sources that apply.
- What you do next, and which firm you choose, is entirely up to you.