How to vet a solar panel installer in Warrington

Step 1: start from the register, not the advert

Search engines and letterboxes in Warrington are full of firms offering solar. Begin instead with the MCS installer search, choose solar PV and enter your postcode. MCS, the Microgeneration Certification Scheme, certifies installers technology by technology, and only an MCS-certified installation can be paid for exported electricity under the Smart Export Guarantee. A firm that is certified for heat pumps but not for solar PV is not certified for your job.

Some small firms install under another company's MCS certification. That is allowed, but you should know whose name will be on your MCS certificate and who is responsible if something goes wrong.

Step 2: check the consumer code

Most solar installers belong to one of two consumer codes approved by the Chartered Trading Standards Institute: the Renewable Energy Consumer Code (RECC) or Home Insulation and Energy Systems (HIES). Membership commits the firm to rules on how it sells, what its contract must say, how deposits are protected, and gives you a route to independent dispute resolution if things go wrong. Check the firm's membership on the code's own website, not just its logo on a van.

Step 3: check the company itself

• Companies House: look up the company number on the quote. Check how long it has traded, whether its accounts are up to date, and whether the directors have a string of dissolved companies behind them.
• TrustMark: the quality scheme for work in homes that the government endorses. Registration is needed for some funded schemes and is another place to confirm a firm's standing.
• Insurance-backed warranty: ask who underwrites the workmanship warranty. An insurance-backed warranty survives if the firm closes; a promise on letterhead does not.

Step 4: get it in writing

Ask for a written, itemised quote from each firm. It should name the panels, inverter and mounting kit; predict the yearly output by the MCS method with any shading stated; say whether the network operator will be notified under G98 or must approve the system under G99 first; list every warranty; and set out the deposit and payment stages. The quote checker runs the numbers, and the line-by-line guide explains each item.

Step 5: compare two or three

Print or copy this sheet. For price per kW, the 2025/26 North West average was about £1,800 up to 4 kW and £1,627 for 4 to 10 kW (DESNZ).

Three checks that are particular to Warrington

• Which network operator will they notify? Most of the borough is served by SP Energy Networks, but by our estimate most of Birchwood, much of Culcheth and Glazebury and part of Rixton and Woolston fall in Electricity North West's area. A firm that has looked properly at your address should name the right one without hesitating; see connecting to the grid.
• Has anyone checked the planning position? Warrington has 16 conservation areas, 392 listed building entries, and the council's Thelwall Village leaflet records an Article 4 direction made there in 1985, which is worth checking with the council if you live there. Ask whether the firm checked your address before quoting rather than after the scaffold is up; the planning page sets out the rules.
• Is the firm claiming to be the grant installer? Under the Warm Homes: Local Grant you do not pick the installer. Warrington Borough Council's page names the scheme's assessor and its installer, and applications start on GOV.UK. Anyone else selling "the council grant" at the door should be checked with the council first; see grants and funding.

Warning signs

• A price that expires when the salesperson leaves. Real prices do not.
• Talk of a grant everyone can get. There is no such grant for solar panels. The genuine Warm Homes: Local Grant is means-tested and uses installers appointed by the scheme.
• A savings figure without its workings. Any saving should come with the tariff and the share of the electricity you are assumed to use yourself.
• No survey. A quote given without anyone looking at your roof, in person or with detailed photos and measurements, is a guess.
• A big deposit, paid to a personal account. Ask how deposits are protected under the firm's consumer code.
• Reluctance to put things in writing. If it is not on the quote, it is not promised.

Your cancellation rights

If you agree a contract in your own home, or anywhere other than the firm's premises, you normally have 14 days to cancel without giving a reason. The period runs from the day after you enter the contract. If you ask the firm to start work within those 14 days and then cancel, it can charge for work already done. Citizens Advice publishes template letters for cancelling. Consumer code members must explain your cancellation rights in writing.

On the day of installation and after

A good installer will tell you who is coming, how long scaffolding will be up, where the inverter and isolators will go and when the system will be switched on. At handover you should get the MCS certificate, the electrical installation certificate, confirmation of the network notification, datasheets and warranties. Our after-installation guide lists what to keep and what to check in the first year.

Why we do not list installers

We cannot vouch for any firm's work, and a list of names would only move the trust question from the installer to us. This guide is published by SEO-DONS LTD and gives you the means to check any firm yourself. If you have a quote you would like a second view on, send the details through the form below.

Where to go next

• Quote checker
• Reading a quote line by line
• Solar prices in Warrington
• After installation

Where these figures come from

1. MCS: find a certified installer
2. MCS standards and tools library (MIS 3002, MCS 012)
3. Renewable Energy Consumer Code (RECC)
4. HIES consumer code
5. TrustMark
6. Citizens Advice: cancelling a service you have arranged
7. DESNZ: solar PV cost data, 2025/26
8. Ofgem: Smart Export Guarantee
9. SP Energy Networks: connecting to the grid
10. NESO: GB distribution network operator licence areas
11. Warrington Borough Council: heritage and built environment evidence (16 conservation areas)
12. Planning data platform (MHCLG): conservation areas, listed buildings, scheduled monuments
13. Warrington Borough Council: Thelwall Village conservation area leaflet
14. Warrington Borough Council: Warm Homes: Local Grant