Why MCS Accreditation Matters
MCS (Microgeneration Certification Scheme) accreditation is the single most important check when hiring a solar panel installer in Wales. MCS accreditation is:
- Required to access the Smart Export Guarantee (SEG) โ the tariff paid for electricity exported to the grid. Without an MCS-certified installation, you cannot register for SEG payments.
- Required for most grants โ Warm Homes Programme and other Welsh Government grants typically require MCS-certified installations.
- A quality signal โ MCS installers must meet installation standards, use certified products, and undergo regular assessment.
You can check MCS accreditation at mcscertified.com โ search by postcode or company name.
Solar Installer Checklist for Wales
Before signing any contract with a Welsh solar installer:
- Confirm MCS accreditation (search mcscertified.com)
- Check NAPIT or NICEIC registration for the electrical installation work
- Ask for a site survey โ roof condition, orientation, shading, and structural load must be assessed
- Get at least 2 quotes from MCS installers for comparison
- Confirm the panel brand and model โ check performance warranty (minimum 25 years)
- Confirm inverter brand and warranty (typically 5โ12 years, should be extended)
- Ask who will handle DNO (Distribution Network Operator) notification โ this is required before connection
- Confirm scaffolding is included in the price
- Ask about insurance for the installation period
- Check Trustpilot and Google reviews for recent Welsh installations
Getting and Comparing Quotes
Ask each installer to quote the same specification: system size (kWp), number of panels, panel brand, inverter brand, battery option (if applicable), and whether SEG registration is handled.
Price differences between quotes often reflect panel quality, inverter quality, or workmanship standards rather than pure competition. The cheapest quote is not always the best value for a system that should last 25+ years.
Red flags:
- High-pressure sales tactics (limited-time offers, same-day decision required)
- No MCS accreditation
- No site survey before quoting
- Very low prices (often indicate lower-quality components)
- Payment required in full upfront before installation