A Clean Energy Council (CEC)-accredited installer has met the council’s training and competency requirements for relevant solar work. Using an appropriately accredited installer may be necessary for your system to qualify for Small-scale Technology Certificates (STCs), which can reduce the upfront price, subject to scheme rules and eligibility. Check the installer’s current accreditation in the CEC’s public directory and confirm they hold the required state or territory electrical licences. It is also sensible to compare written quotes, warranties and after-sales support before signing.