Check that the installer is appropriately licensed and accredited with the Clean Energy Council, and ask for evidence of public liability insurance. Compare written quotes covering the system design, panels, inverter, battery if applicable, installation costs, warranties, monitoring and likely timeframes. Confirm who will handle grid connection, meter changes, rebate paperwork and any required approvals, and read the contract’s payment, cancellation and workmanship terms carefully. It is also sensible to check recent references and verify product warranties with the manufacturers; an independent electrician or the relevant network may help clarify technical requirements.