Australian solar and battery guide
Adding a battery to existing solar in Australia
A battery retrofit can make sense when there is solar to charge it and enough later electricity use to benefit. Your existing equipment and network rules also matter.
By Solvetted · Reviewed · General information
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Read your existing system correctly
Your bill can show grid imports and credited exports. It normally does not show all solar generation or electricity consumed directly while the panels produce. Use inverter monitoring or interval data where available to understand the pattern.
An export limit may also hide generation that was curtailed. Do not treat recorded exports as the entire amount of solar that might be available to a battery.
Check compatibility before comparing prices
Ask a qualified installer to check the inverter, switchboard, available installation space, network connection and proposed AC- or DC-coupled design. Ask how the system behaves during an outage and which circuits are actually backed up.
Compare usable capacity, power output, efficiency, warranty and any ongoing software or virtual power plant conditions. Keep these separate from a quoted headline battery size.
Compare against keeping what you have
The financial baseline is your current solar system, not a home with no solar. The battery's benefit is the extra value beyond that baseline. Compare the added installed cost with the added annual benefit under the same tariff and usage assumptions.
Eligible batteries connected to existing solar may receive federal certificate support, but the rules and discount vary by installation date and system details. Get an itemised quote and confirm current eligibility with the official program information.
Start with your home
See what a battery adds to your solar.
Count the feed-in you give up, size it to the solar you really export, and see the payback.