Compare the system’s total price, panel and battery capacity, expected output, warranties, monitoring, and whether installation is completed by an appropriately accredited professional. Ask how the battery will operate during a blackout, as backup power may require specific equipment and selected circuits. Any rebates or incentives depend on the product, installer, property and current government rules, so confirm details through the official energy.gov.au website and your installer before signing. It is also worth checking the retailer’s feed-in tariff, ongoing electricity rates and battery replacement terms.