Microgeneration certificates for installers

MCS certification is the baseline for competent UK solar installers — understand what the certificate proves and what it does not.

What MCS certifies

The Microgeneration Certification Scheme sets standards for products and installers of small-scale renewables. MCS installation certificates are required for Smart Export Guarantee registration and many finance products. The certificate records system size, components, and commissioning date.

Installer certificate vs product listing

Panels and inverters must be MCS-approved products installed by MCS-certified firms. A handyman fitting non-MCS kit voids SEG eligibility and may breach building regulations notification rules.

• Verify installer company number on the MCS database before deposit.
• Confirm product models in quote match MCS listing at order time.
• Receive MCS certificate within days of commissioning — chase delays.
• Store certificate PDF with property deeds folder for resale.

RECC and consumer code

Many MCS installers also join the Renewable Energy Consumer Code — dispute resolution and deposit insurance may apply. Read your contract's cancellation and deposit protection clauses.

Handover pack essentials

Expect wiring diagrams, shutdown procedure, inverter manual, and DNO acceptance letter alongside MCS certificate. Missing documents slow SEG applications and conveyancing.

MCS is a floor, not a ceiling — still compare quotes, references, and warranty terms.

Retrofit and extension work

Adding panels later may need amended MCS documentation — ensure second arrays integrate legally with original export metering.