MCS explained: why it matters when you choose an installer

What MCS is, what it means for you, and why it affects your export payments.

4 min read Last reviewed: 28 September 2026

In short

MCS (the Microgeneration Certification Scheme) is the UK's quality standard for small-scale renewable installations like solar panels and heat pumps. Using an MCS-certified installer means your system is designed and installed to a recognised standard, and you'll normally need an MCS certificate to receive Smart Export Guarantee payments.

What is MCS?

MCS certifies both installers and products. Certified installers are regularly assessed on how they design, install and commission systems, and must belong to a consumer code that sets standards for how they treat customers.

Why it matters to you

Export payments: energy suppliers generally require an MCS certificate before paying you under the Smart Export Guarantee.
Standards: your system is designed and installed to a recognised technical standard.
Paperwork: you receive an MCS certificate for your installation, which is useful when you sell your home.
Grants: some government schemes require an MCS-certified installer.

How to check an installer

Ask for their MCS certificate number and check it on the MCS website. A good installer will be happy to show you.

Rules, rates and schemes change. This guide was last reviewed on 28 September 2026. If you're making a decision based on it, we'll confirm the current position when we quote.

Related guides

All guides →

Energy & tariffs

The Smart Export Guarantee: getting paid for your spare electricity

How export payments work, who pays them and how to get the best rate.

4 min read

Regulations explained

G98 and G99 explained: connecting solar to the grid

Why your network operator needs to know about your system, and what the difference between G98 and G99 means for you.

5 min read

See your savings in under a minute

Tell us a bit about your home and get an indicative system size, price and payback. You don't need to give us your email to see the results.

Calculate your savings Speak to Tier 1 Solar

Call Get a free quote