5 min read
Published by QUOTES AND DEALS · Updated
14 September 2026
· Sources & editorial policyTHE SHORT ANSWER
Compare the same property brief, exact equipment, full installed price, exclusions and aftercare. Ask each provider to explain its generation and savings assumptions before comparing the final payable amount.
Start with the same brief.
Give every installer the same information: your location, roof, current system, electricity use and what you want to achieve. Include whether backup power matters. A quote built on a different assumption cannot be compared fairly.
Ask for the complete scope.
Record exact panel, inverter and battery model numbers; panel capacity in kW; battery usable capacity in kWh; and continuous power in kW. Separate the full price, GST, incentives and final payable amount. Ask about switchboard work, metering, access, removal of old equipment and grid connection.
Make the savings explainable.
Ask for generation and usage assumptions, self-consumption, import and export tariffs, battery efficiency and any VPP revenue. Treat a best-case projection as a scenario. Compare a solar-only option as well as solar with storage.
Name the responsible business.
Your quote should identify the contracting entity and ABN, actual installation arrangements, warranty contacts, exclusions and the process for variations. Keep the final accepted quote and every later agreed change.
Sources & further reading
ACCC solar and battery guidance ↗General information, not a site-specific design or an eligibility decision. Confirm requirements with the relevant authority and your installer.
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