MCS Certification for Solar: Why It Matters + How to Check Your Installer

MCS certification is the industry quality mark for small-scale renewable energy installations in the UK. Here's why it's non-negotiable.

Why MCS Certification Matters

Required for SEG Payments

You can only earn from the Smart Export Guarantee if your system was installed by an MCS-certified installer.

Quality Assurance

MCS sets standards for design, installation, and commissioning — covering equipment, workmanship, and safety.

Consumer Protection

MCS-certified installers must belong to a consumer code (e.g., RECC or HIES), giving you dispute resolution and deposit protection.

How to Check Your Installer

Step 1: Search the MCS Database

Visit the official MCS Installer Database at mcscertified.com. Enter your postcode to find certified installers in your area.

Search MCS Database

Step 2: Verify the Certificate

Every MCS-certified installer has a unique certificate number. Ask for this before paying any deposit. The certificate should cover solar PV specifically — MCS covers multiple technologies.

Step 3: Check Consumer Code

Confirm membership of an approved consumer code: RECC (Renewable Energy Consumer Code) or HIES (Home Insulation & Energy Systems). This provides dispute resolution and insurance-backed guarantees.

Step 4: After Installation

Your installer should provide an MCS certificate for the completed installation. This is your proof for SEG applications, building regulations sign-off, and any future property sale.

Red Flags to Watch For

Not listed on the MCS Installer Database
No mention of consumer protection scheme membership
Pressure to sign quickly without a written specification
Refuses to provide MCS certificate number before deposit
Won't confirm DNO notification responsibility
Quotes without a site survey

What MCS Certification Actually Covers

Installation Standards

• Proper roof assessment and structural checks
• Correct system sizing based on energy usage
• Compliant electrical installation (BS 7671)
• DNO notification (G98/G99 compliance)
• Commissioning and performance verification

Product Standards

• Panels must meet IEC 61215 / IEC 61730
• Inverters must meet EN 50549 / G98/G99
• Mounting systems must be structurally certified
• Battery storage must meet relevant safety standards
• All components must have traceable warranties

Get Quotes from MCS-Certified Installers

Every installer in our network is MCS-certified with verified consumer code membership.

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