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Short answer
The right battery size depends on your daily electricity use, how much your solar system produces and your inverter’s capacity. Bigger isn’t always better. The Australian Government warns that installing a battery too large for your solar or inverter can limit its benefits, so size it to your home rather than going as big as possible.
What we look at:
- your daily electricity use and when you use it
- your solar system’s output
- your inverter’s capacity
- whether you want backup power, or plan to add an electric vehicle.
As at November 2026, the federal discount also tapers with size: usable capacity above 14 kWh earns support at a reduced rate, and certificates are only created for the first 50 kWh of usable capacity. See Is the federal battery discount reducing?
Want advice for your home or business? Call 1300 732 679 or request a quote and our team will be in touch.
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