Check your past 12 months of electricity use, daytime versus evening consumption, roof space, orientation, shading and any switchboard limitations. Allow for future loads such as a heat pump, induction cooking, electric vehicle or pool equipment, and decide whether battery storage is part of the plan. Compare panel capacity, inverter size, expected generation, export limits and the system’s eligibility for applicable STCs or other support, which can depend on current rules and your circumstances. Ask a licensed installer for an on-site assessment and confirm details with your electricity distributor and the official energy.gov.au website.