Changes To The MCS... UPDATE!

Understanding the Upcoming Changes to the MCS Scheme

The Microgeneration Certification Scheme (MCS) has long been the gold standard for quality and compliance in the UK’s renewable energy sector. From solar panels and heat pumps to battery storage systems, MCS certification helps consumers and businesses alike identify trusted, competent installers and quality products.

Now, the scheme is undergoing its most significant transformation to date — known as MCS 2.0 — a complete overhaul designed to raise standards, streamline processes, and better protect consumers. These changes are particularly relevant for solar and battery storage installers, with new standards and operational updates rolling out throughout 2025 and into early 2026.

Whether you’re an installer or a homeowner considering a renewable energy upgrade, understanding these changes is crucial. Here’s what you need to know.

Why Is MCS Changing?

The renewable energy sector has grown rapidly in recent years, driven by ambitious net-zero targets and increasing consumer demand for sustainable solutions. But with that growth has come growing pains — inconsistent installation quality, gaps in consumer protection, and admin-heavy certification processes.

MCS 2.0 is the industry’s response to these challenges. Led by CEO Ian Rippin and shaped through consultation with installers, certification bodies, and consumer groups, the updated scheme aims to:

Prioritise installation quality over paperwork
Create a more supportive relationship between MCS and installers
Introduce a central complaints handling system for consumers
Streamline technical standards for solar PV and battery storage

These aren’t just small updates — they represent a fundamental shift in how MCS operates.

When Are the Changes Happening?

The changes are already underway, with 2025 marking the start of a rolling transition to the new MCS 2.0 framework.

Key milestones:

Early 2025:
- New standards published (MCS 032:2025 and updated MIS 3012)
- Installers encouraged to begin aligning with the new requirements
Mid to Late 2025:
- Certification bodies begin assessing against new standards
- Transition period supports installer adaptation
2026 Onwards:
- Full adoption of MCS 2.0
- Ongoing support and digital tools provided by MCS

What’s Changing for Solar and Battery Installations?

New Technical Standards:

MCS 032:2025 – Design and Quality

This new standard outlines best practices for:

Accurate performance estimates
Designing efficient and fit-for-purpose systems
Ensuring safety, functionality, and long-term reliability

MIS 3012 – Battery Storage Installations

This standard is being updated to reflect fire safety best practices from PAS 63100:2024, with a focus on:

Installation safety in confined areas like lofts
Proper ventilation and access
Risk assessment and documentation

These changes will help futureproof installations and improve safety across the board.

A Stronger Focus on Consumer Protection

MCS 2.0 places a greater emphasis on protecting customers and ensuring positive outcomes.

Key improvements include:

Centralised complaints handling — MCS will now manage consumer complaints directly
Customer feedback — MCS will contact homeowners post-installation to ensure satisfaction
Improved financial protection — A new standard is being developed to replace unreliable insurance-backed guarantees

What Installers Need to Do Now

Installers can get ahead of the changes by preparing early. Here’s how:

✅ Review the new standards — MCS 032:2025 and updated MIS 3012
🛠️ Adjust internal processes — Improve documentation, QA checks, and aftercare routines
📚 Train your team — Make sure engineers and subcontractors are up to date
🤝 Engage with your certification body — Stay in the loop about transition support and assessment changes

Final Thoughts: A Better Industry for All

The shift to MCS 2.0 is a bold step toward a more reliable, transparent, and high-quality renewable energy industry in the UK.

For installers, it’s an opportunity to improve operations and stand out in a growing market. For homeowners, it means better protection, performance, and peace of mind.

The MCS transition is already in motion — are you ready?