The Microgeneration Certification Scheme (MCS) is implementing its biggest transformation since its inception. Installers will experience a rolling transition throughout 2025 and into 2026 as MCS moves them to the redeveloped scheme. This overhaul promises the UK’s low-carbon energy sector a simpler, fairer, and more quality-focused certification process. Therefore, existing and aspiring MCS installers must understand these changes to ensure future business success.
What Changes Affect MCS Installers? A Focus on Performance
The redeveloped MCS scheme’s core philosophy shifts from excessive paperwork and Quality Management Systems (QMS) to the delivered quality of the installed system on-site. MCS directly addressed installer feedback that called the current system too bureaucratic.
Less Paperwork, More Quality: Future compliance assessments will concentrate on on-site performance. They will require evidence that systems function effectively, moving away from a focus on back-office administration. This streamlined approach makes certification more accessible.
Risk-Based Assessments: MCS will introduce a new Quality Risk Model. Installers with a proven track record (high-quality installations, consistent customer satisfaction, and fewer complaints) will receive a reward: fewer site assessments. Conversely, higher-risk installers will face more frequent scrutiny.
Standardised Technical Requirements: MCS has restructured and simplified the Installation Standards. Consequently, the standards now contain only the technical ‘truths’ for system design and installation, improving clarity for engineers.
Centralised Consumer Protection: MCS will take a more active, centralised role in managing customer complaints and disputes. This enhances consumer confidence, and compliant installers can avoid getting bogged down by vexatious complaints.
Voluntary Consumer Code Membership: MCS will remove the mandatory requirement for membership with a Consumer Code (like RECC or HIES) once the full transition to the new scheme is complete. MCS’s direct involvement will now provide the necessary consumer safeguarding.
New Technical Supervisor Role: Every installation will require a newly defined Technical Supervisor to sign it off. This ensures clear accountability and quality for the work.
Key Business Benefits
These changes specifically help high-quality renewable energy installers thrive by reducing their administrative burden and rewarding excellence.
Reduced Compliance Costs and Time: Since the new assessment model is risk-based, high-performing companies will spend less time and money preparing for and undergoing routine audits.
Level Playing Field: The heightened focus on on-site quality ensures that all certified businesses adhere to the same high standards. Thus, the scheme holds poor performers to account and safeguards the sector’s reputation.
Enhanced Market Credibility: MCS certification remains the essential mark of quality that unlocks government incentives, such as the Boiler Upgrade Scheme (BUS) and the Smart Export Guarantee (SEG), for your customers. The improved focus on consumer protection will further strengthen the MCS brand and your standing with clients.
Get Ready Now
Although the full transition will roll out throughout 2025 and into 2026, installers should start reviewing the new Installer Operating Requirements and MCS Installation Standards documentation that MCS has published. Therefore, prepare your internal systems now to align with the new focus on delivered quality and the new Technical Supervisor role.
The Redeveloped MCS Installer Scheme takes a major step toward supporting the massive growth required for the UK to meet its Net Zero targets. By embracing a scheme that prioritises quality over bureaucracy, your business is perfectly positioned to capture more of the growing demand for solar PV, heat pumps, and battery systems.
Take a look at our Renewable courses:
Find out more about the MCS mission to give everyone confidence in low-carbon energy by defining, maintaining and improving quality here.
