A useful solar panels guide should cover your electricity use, roof orientation and shade, system size, panel and inverter quality, warranties and installation standards. Compare several detailed quotes, including expected generation, monitoring, maintenance and any export limits set by your network. Upfront costs may be reduced by federal STCs or state programs, but eligibility and value can change and are determined under the relevant scheme rules. Check current information through energy.gov.au and consider using an appropriately accredited installer who can assess your property and explain the options.