Start by comparing several written quotes that clearly list the panel and inverter brands, system size, estimated output, installation costs and warranties. Check whether the installer and proposed products meet current Clean Energy Council requirements, which may affect access to federal small-scale technology certificates. Ask who will handle grid connection, approvals, monitoring and after-sales support, and look for evidence of relevant licences and insurance. Be cautious of pressure to sign quickly or claims about guaranteed savings. Before deciding, check the installer with your state regulator and confirm key terms directly with the retailer or installer.