Does it really matter if your solar or heat pump installer is MCS certified?
Yes, and the financial consequences of getting this wrong are serious. Without an MCS-certified installer, you cannot access the Boiler Upgrade Scheme grant or the Smart Export Guarantee. Together that is potentially thousands of pounds of government funding and ongoing solar income that simply disappears.
This happens. A homeowner chooses a non-certified installer to save money on the installation and ends up unable to claim the BUS grant that would have been worth far more than the saving. It is one of the more avoidable mistakes in this industry.
What is MCS certification?
MCS, the Microgeneration Certification Scheme, is the UK’s official quality standard for small-scale renewable and low-carbon energy installations. To work under MCS, an installer must demonstrate technical competence, carry appropriate insurance, follow MCS installation standards, and maintain ongoing compliance through regular audits.
It is a legal framework, not just a quality badge. Certain government incentives are explicitly tied to it.
What do you lose without an MCS-certified installer?
The Boiler Upgrade Scheme grant. The BUS requires that the heat pump installation is carried out by a current MCS-certified installer and registered with MCS before the grant application can be made. If your installer is not MCS-certified, the £7,500 grant is unavailable to you, full stop.
The Smart Export Guarantee. Solar panel installations must be certified under MCS for the homeowner to register for the SEG and receive payment for exported electricity. A solar installation completed by a non-certified company generates electricity, but you will not be paid for any of it that you export.
Consumer protection. MCS-certified installers operate under a consumer code that includes dispute resolution. If something goes wrong, there is a clear path for complaints. With a non-certified installer, that route does not exist.
What does MCS certification mean in practice?
An MCS-certified installer has demonstrated that they meet the minimum technical standard for the installation type. They have been audited. Their work is subject to MCS standards documentation.
It is important to be honest about what MCS certification does not guarantee. It does not guarantee that the installer will carry out a proper heat loss calculation before specifying a heat pump. It does not guarantee that they will commission the system correctly or that their customer service will be adequate. MCS sets the floor. The quality of work above that floor varies considerably between installers.
My advice is always to treat MCS certification as a necessary condition, but not as the only criterion for choosing an installer.
How do you verify that an installer is currently MCS-certified?
Check the MCS installer database directly at mcscertified.com. . You can search by company name or postcode. Certification must be current, some companies allow their certification to lapse while continuing to install, which disqualifies any work they complete during that period from grant eligibility.
Always verify directly. Do not rely on a company’s own assurances or a logo on their website.
AES’s MCS certification status
AES Limited is fully MCS-certified and has maintained that certification throughout our history of installing renewable energy systems across Hampshire. We are also a Mitsubishi approved partner, a separate manufacturer accreditation that requires demonstrated competence with their specific heat pump equipment.
Every installation we complete is registered with MCS at the point of handover. The BUS grant application and SEG registration are handled by us as part of the standard process.
Related reading:
Are all MCS-certified renewable energy installers the same?
Is it safe to go with the cheapest quote for solar panels or a heat pump?
What is the Boiler Upgrade Scheme and who is it actually for?
Using a non-MCS-certified installer is a significant financial risk, not just for quality reasons, but because it disqualifies you from thousands of pounds of available government funding. Verify certification before you agree to anything.
Call AES Limited on 01794 830 404 or contact us to book your free survey.
FAQs
Can I get the BUS grant if my installer was not MCS-certified at the time?
No. MCS certification must be current at the time of installation and the work must be registered with MCS before the grant application is made. There is no retrospective route for non-certified installations.
What happens if an MCS-certified installer’s certification lapses after completing my installation?
Your installation remains registered with MCS from the point of completion. The grant application, if submitted before the certification lapsed, remains valid.
Is MCS certification required for battery storage?
Battery storage installations are not currently required to be MCS-certified to operate. However, if the battery is installed as part of a solar system you want to register for the SEG, the solar installation must be MCS-certified. AES installs battery storage, including GivEnergy and Tesla Powerwall, under MCS as standard.
Does MCS certification cover air conditioning?
MCS certification currently covers solar PV, solar thermal, heat pumps, wind, hydro, and battery storage. Air conditioning installations are not currently within the MCS scope.
How often does MCS certification need to be renewed?
MCS certification is maintained through ongoing compliance audits. Installers must continuously meet MCS standards to retain their certification. The database at mcscertified.com reflects current status in real time.
