How to Choose the Right Solar Panel Installer in the UK

Thinking of going solar? Great. But who do you trust to install the panels? How do you choose the right solar panel installer?

With hundreds of providers out there, picking the right one can feel overwhelming. Some offer premium panels and full aftercare. Others just want your signature and disappear once the job is done.

This guide will help you cut through the noise and choose a solar installer you can rely on.

1. Stick with MCS Certified Installers

In the UK, always choose an installer certified by the Microgeneration Certification Scheme (MCS). This ensures:

• Your system meets national quality standards

• You qualify for the Smart Export Guarantee (SEG)

• You are protected by proper warranty terms

You can check the official list of certified providers at mcscertified.com.

2. Look Beyond the Quote

Cheap does not mean good. Get at least three quotes and compare more than just price:

• What panels are they using (brand, efficiency, warranty)?

• Are they quoting for the right system size for your home?

• Do they offer support, maintenance, or monitoring?

Good installers walk you through everything and do not pressure you into signing.

3. Understand the Warranty

At minimum, you should expect:

• 25 years performance warranty on panels

• 10 to 15 years warranty on the inverter

• 5 to 10 years on workmanship

Make sure you get this in writing. Ask what happens if something breaks. Will they come out and fix it?

4. Check Reviews and Local Experience

Look at recent reviews on Trustpilot, Google, or Which? Trusted Traders. Prioritise installers with experience in your area. They will understand:

• Your local DNO (network operator)

• Roof types and shading issues

• Council rules or conservation zones if applicable

5. Ask About Financing

Some companies offer:

• Support with grants or local council incentives

If you are paying upfront, make sure deposits are protected (for example, through HIES or RECC membership).

What Martin Lewis Says About Going Solar

Martin Lewis, founder of MoneySavingExpert, has advised homeowners to:

• Do the maths. Solar is now more financially viable, but it depends on your usage and roof.

• Get multiple quotes and compare systems, not just cost.

• Avoid leasing panels unless you fully understand the terms. It can affect your property value.

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He recently described solar as "increasingly worthwhile" but warned against rushed decisions or pushy sales tactics.

Final Tips Before Signing Anything

• Ask for a site visit. Avoid firms offering quotes without seeing your roof.

• Review the system design. Check panel placement, estimated output (in kWh), and SEG income.

• Check for delays. A busy installer might be a good sign, but make sure their timeline works for you.

• Stay away from cold callers. Reputable firms will not pressure you into anything.

Want help comparing quotes or understanding what panels are best for your home?

Solarsmith® is happy to walk you through it with no sales pressure, just honest, expert advice.