Compare each Perth solar quote on the same basis, including panel and inverter brands, system size, estimated output, installation details and total price after any applicable incentives. Ask whether the installer is accredited under the relevant industry scheme and check the warranties, workmanship coverage, monitoring and after-sales support. Savings estimates depend on your electricity use, tariff, shading and future energy prices, so treat projections as estimates rather than guarantees. You can also verify incentive details through the official energy.gov.au website and seek advice from a licensed installer before signing.