How to Choose a Solar Installer in the UK

Check MCS certification — properly

MCS (Microgeneration Certification Scheme) certification is the industry standard, and it's what makes your installation eligible for the Smart Export Guarantee. But MCS certifies at company level, and specific products are certified individually too — so it's worth asking directly whether the installer is MCS-certified, and whether the exact panels and battery being quoted are on the current MCS product list.

Get more than one quote — and compare like for like

Quotes can vary a lot depending on panel technology, system size, and what's included (scaffolding, battery, monitoring). Ask each installer to break their quote down by equipment, labour, and any extras, so you're actually comparing the same thing.

Ask about VAT

Qualifying residential solar installations are currently 0% VAT. If a quote has 20% VAT added on top for what should be a qualifying installation, it's worth asking why.

Understand your cancellation rights

If you agree to a contract in your home (rather than at a business's premises), UK consumer law gives you a 14-day cooling-off period. A reputable installer will give you this in writing and won't pressure you to start work within that window without your clear, explicit agreement.

Ask what happens after installation

Find out what certificates you'll receive (Electrical Installation Certificate, MCS certificate), how warranty claims work, and whether the installer offers any ongoing support if something needs checking a year or two down the line.

Trust your gut on pressure tactics

Same-day discounts, "sign today or the price goes up," and reluctance to put things in writing are all worth treating as a red flag, whoever you're getting quotes from.