A useful solar panel cost checklist should cover the system size, panel and inverter brands, mounting hardware, installation labour, switchboard or roof upgrades, monitoring, and any battery or electrical work. Check whether the quote includes GST, warranties, approvals, metering changes and expected ongoing maintenance, and compare like-for-like products rather than just the total price. Ask the installer about likely export limits, estimated annual generation and any feed-in tariff assumptions. Before signing, confirm the installer’s credentials and review current rebate information through the official energy.gov.au website, as eligibility and available incentives can change.