A solar payback period in 2026 is often estimated at several years, but it varies widely by system cost, location, electricity use, export tariff and whether a battery is included. Calculate it by dividing your net upfront cost, after any applicable incentives, by your estimated annual savings and feed-in income. Higher self-consumption generally improves payback, while batteries usually add cost but may provide other benefits. Compare current quotes and assumptions carefully, and check incentive eligibility through energy.gov.au or with a licensed solar professional, as actual results are not guaranteed.