What is MCS certification?
MCS (Microgeneration Certification Scheme) is the UK's quality standard for small-scale renewable energy installations. An MCS-certified installer has been independently audited for technical competence, customer service standards, and compliance with building regulations.
For solar panels, MCS certification means the installer has demonstrated they can design, install, and commission solar PV systems to the required British and international standards (BS EN 62446, IEC 61215).
Why MCS matters for your wallet
Without MCS certification on your installation, you cannot claim the Smart Export Guarantee (SEG) — the scheme that pays you 4–15p/kWh for surplus electricity exported to the grid. Over 25 years, that's £2,000–£8,000 in lost income.
MCS-certified installations also qualify for:
- 0% VAT on solar panels (since April 2022)
- ECO4 and Home Upgrade Grant funding
- Solar Together group-buying schemes
- Higher property valuation — estate agents recognise MCS installations
For the full breakdown of financial incentives, see our grants and funding guide.
How to check if an installer is MCS-certified
Go to the MCS Installations Database at mcscertified.com. Search by company name or postcode. The listing shows their certification number, what technologies they're certified for (solar PV, solar thermal, heat pumps), and their certification body.
All installers in our Leeds solar panel directory are Companies House registered businesses. Ask for their MCS certificate number before signing any contract.
What happens during an MCS-certified installation
- Site survey. The installer visits your property, assesses roof suitability, measures shading, and designs the system using MCS-approved software (SAP or MCS PV calculator).
- Design approval. The system design must meet MCS performance standards — minimum predicted output based on location, orientation, and tilt angle.
- Installation. Carried out by qualified electricians to BS 7671 wiring regulations and IEC 61215 panel standards.
- Commissioning. The system is tested, performance verified, and handover documentation provided.
- MCS certificate issued. You receive an MCS certificate and the installation is registered on the MCS database. This is your ticket to the SEG.
The whole process ensures your system is safe, performs as expected, and qualifies for all financial incentives. See our installation process guide for the full timeline.
Can non-MCS installers fit solar panels?
Technically, yes. Any qualified electrician can install solar panels. But without MCS, you lose all financial incentives and your installation won't be registered on the national database. Second-hand buyers may also be wary of non-MCS systems.
The cost difference between MCS and non-MCS installers is typically only 5–10%. Not worth the risk. Compare MCS-certified installers in Leeds.