When comparing a solar installer on the Central Coast, check their Australian business details, electrical licence, relevant accreditation and experience with local roof and coastal conditions. Get at least two or three itemised quotes covering panels, inverter, installation, monitoring, warranties, grid connection and any expected export limits. Ask who will perform the electrical work and verify reviews independently rather than relying only on testimonials supplied by the company. Before signing, confirm system design and incentive assumptions with the installer, and check current requirements through the Clean Energy Regulator or your electricity distributor.