The MCS certificate for solar panels

The world of solar panels is awash with technical terms and acronyms, and one you’ll come across a lot is ‘MCS’, or the Microgeneration Certification Scheme. 

While lots of solar panel jargon is not essential for you to know before you get a solar & battery system, it’s definitely worth knowing a bit about the MCS - particularly when it comes to choosing a reliable installer. 

To find out how much an MCS-accredited solar & battery system could save you on your energy bills, answer a few quick questions below and we'll provide you with an estimate.

What is the MCS certificate for solar panels?

The Microgeneration Certification Scheme (MCS) is a government-backed UK initiative that was set up in 2007 to make sure small-scale renewable energy installations, like solar panels and heat pumps, meet universal quality standards.

This came at a very important time for the solar panel industry in the UK, as it wasn’t long before the Feed-in Tariff suddenly fired up demand for solar across the nation. And given the fairly high upfront cost of solar panels, it makes sense that solar installations need to meet a certain level of quality.

There are MCS certifications available for solar panels and installers, ensuring that the two core aspects of your system meet the highest standards.

Why is the MCS certificate important?

For any person considering the switch to solar, an MCS certificate is a vital accreditation to look out for.

If an installer has MCS certification it means they’ve met a whole host of rigorous requirements, ranging from technical skills (under the MCS 001 and Solar PV-specific Standards) to their competency in running a reputable business.

For solar panels, the MCS certificate is a seal of approval that shows consumers a) they're safe, b) they work like they should, and c) they're built to last. The MCS Product Standards sets out a lengthy list of testing and performance criteria, as well as checking the panels have regulatory safety marks and that the manufacturers carry out regular audits.

When speaking to solar panel installers, be sure to ask them if they are MCS accredited - along with these six other important questions.

What are the benefits of having an MCS certificate?

If your domestic solar & battery installation has an MCS certificate, it means you’ll experience the following advantages: 

• Access to most smart export tariffs, potentially worth around £350 per year*
• Fewer malfunctions and issues with your system
• Higher output due to efficient, quality hardware, leading to more savings
• Increased property value through professional installation

*Based on a household experiencing average UK irradiance with a 4.4kWp solar panel system and a 5.2kWh battery, using 3,500kWh of electricity each year and signed up to the Intelligent Octopus Flux export tariff

Is it mandatory for your solar panels to have an MCS certificate?

It's not strictly mandatory for your solar panels to have an MCS certificate, but it's highly recommended, especially if you want to cash in on certain financial incentives.

Having an MCS certificate opens doors to export tariff schemes like the Smart Export Guarantee (SEG), which pays you for sending surplus electricity to the grid. SEG tariffs have strict requirements, one of which is MCS certification.

In the case of other export tariffs, it largely depends on the specific scheme and provider. As of January 2024, Octopus Energy appears to be the only provider that doesn’t require households to have an MCS certificate in order to access their non-SEG export tariffs. However, in these instances, the installation still needs some form of valid international certification.

How can you verify that your solar installer is MCS certified?

Checking if your solar installer is MCS certified is pretty straightforward. The MCS website has a handy database where you can search for certified installers by their name and location – just pop in their details and the site will confirm if they're registered, as well as their unique Certification Number.

How do you get your MCS certificate for your solar panels?

Your installer usually takes care of getting an MCS certificate for your solar panels during the installation. But to be eligible for an MCS certificate, your solar panel installation must first:

1. Be commissioned by an MCS-certified installer
2. Use MCS-certified products
3. Have a commissioning date after 15 July 2009

Your installer should issue your MCS certificate within 10 working days of wrapping things up. A good solar panel installer will give you an MCS certificate automatically – but it's always a good idea to double-check at the beginning.

There are only two situations where you can get a copy of your certificate directly from MCS: if the installer isn’t MCS certified anymore or they stop trading. In these cases, you’ll need to pay an administration fee and provide proof of ownership for your solar panel system – if not, you’ll have to go back to your installer to ask for your certificate.

Is the MCS certificate easy for installers to get?

You’ll be glad to know that getting an MCS certificate isn't a simple tick-box exercise for solar panel installers – it requires them to meet a set of strict standards. Here's a brief breakdown of what’s needed:

1. Getting assessed: Installers need to know and show they understand both parts of the MCS 001 Standard and the technical standards for solar PV technology.
2. Competency criteria: The installation company needs to prove they have skilled employees who meet the MCS 025 Standard. This involves identifying a Nominated Technical Person (NTP) who has completed an MCS approved training course for solar PV technology.
3. Processes and procedures: Installers should have evidence of an appropriate Quality Management System (QMS) in place to handle installation quality.
4. Consumer Code membership: Installers have to join a Consumer Code approved by the Chartered Trading Standards Institute (CTSI), like the Renewable Energy Consumer Code (RECC) or the Home Insulation & Energy Systems Quality Assured Contractors Scheme (HIES).
5. Applying to a Certification Body: Finally, installers apply to a Certification Body to assess and inspect their company practices.

As you can see, the MCS certification process for installers is thorough. An MCS-certified installer has to be dedicated and put in effort for each step to maintain a high installation standard.

Can I trust installers who don't have an MCS certificate?

While some experienced installers that aren’t MCS-accredited might still offer quality work, this is a big risk for any homeowner to take. We would strongly recommend the assurance of high standards that come with MCS certification. 

When it comes to non-MCS-certified installers, even a whole host of great reviews doesn’t necessarily mean that their next installation is going to meet the same standards. 

Ultimately, the choice is yours. Just remember, you’re unlikely to be eligible to take advantage of extra cash through SEG incentives or most export tariffs without an MCS certificate – and to get one, you need to use an MCS-certified installer.

What are the risks of not using an MCS-certified installer?

The risks of not using an MCS-certified installer could include:

• Not being eligible for financial perks like the SEG
• The potential risk of poor installation or subpar product quality, affecting efficiency, output and savings
• Manufacturer warranties might require installation by certified professionals
• Shoddy work may affect your property's market appeal and value

How many solar installers are MCS certified?

As of January 2024, the MCS has certified at least 3,300 solar installers – with 1,300 of these certified in 2023 alone, marking a 65% increase from the previous year.

What other solar accreditations are important?

In the UK, there are a few other crucial solar accreditations and membership associations for installers, apart from the MCS. These include:

• Renewable Energy Consumer Code (RECC)
• The Renewable Energy Assurance Limited (REAL) scheme
• National Inspection Council for Electrical Installation Contracting (NICEIC)
• National Association of Professional Inspectors (NAPIT)
• Home Insulation and Energy Systems Quality Assured Contractors Scheme (HIES)
• Solar Energy UK

These accreditations help ensure that installers are qualified, follow best practices, and provide work with certain levels of guarantee or warranty.

Summary

If you're considering installing solar panels on your home or business, getting an MCS certificate is an important step to ensure the quality and safety of your system.

To find out how much an MCS-accredited solar & battery system could save you on your energy bills, click the button below and provide us with a few quick details.

MCS certificate for solar: FAQs