Homeowners should compare several written quotes covering system size, panels, inverter, installation work, monitoring, warranties and any extra electrical or roof costs. Check that the installer uses appropriately licensed electricians and, if you’re seeking small-scale technology certificates (STCs), has the relevant Solar Accreditation Australia accreditation. Ask who will handle grid-connection paperwork, inspect recent customer work and read the contract’s payment, warranty and cancellation terms carefully. SolarWise is an independent information site, so confirm technical details and local requirements with the installer and your electricity distributor before signing.