Compare at least three written quotes from solar installers in Adelaide, checking the panel and inverter models, system size, warranties, estimated output and all installation costs. Confirm the installer uses appropriately licensed electricians and check current accreditation through the Clean Energy Council’s installer directory, where relevant to available incentives. Ask who will handle grid connection, approvals and after-sales support, and look for a clear workmanship warranty rather than relying only on product warranties. Your retailer or distributor will determine connection requirements, while the final suitability and any incentive eligibility depend on your property and current government rules.