Start by searching local installers, then check their current accreditation and electrical licence through the relevant state regulator or industry body. Get at least two or three written quotes covering panels, inverter, mounting, installation, warranties, monitoring and any grid-connection costs. Ask whether the installer will manage approvals and whether your system may qualify for Small-scale Technology Certificates, with eligibility assessed under the applicable rules. Check recent reviews and references, and confirm the proposed equipment suits your roof and energy use before choosing an installer.