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SYSTEM SIZING

What solar and battery set-up should I get?

Choose what’s right for your home.

5 sections3 min readUpdated 19 Oct 2026
Wooden house with solar panels near green trees
Photo: Pexels
3
Proposals, tailored to your roof
4–16 wks
From request to a finished install
1–3 days
Typical time for the installation itself
Short answer. Not everyone has the same priorities when installing solar and a battery. Emily gives you three proposal options that cover a range of needs, to help guide your decision.

Which set-up is right for me?

If you’re looking to install solar and a battery, it can be confusing to know what different system sizes mean for your home and which one to get.

Emily, our AI roof assessment tool, analyses your roof and provides three proposal options. Answer a few extra questions, such as your heating and cooling system type, when you’re most often at home or whether you drive an electric vehicle, to refine the estimates of your potential savings and payback.

What are the three proposals?

Emily’s three proposals are designed around different priorities.

PROPOSALBEST FORHOW IT WORKS
Rebate MaximiserHomeowners looking for the biggest rebatesIncludes a larger battery to secure more government rebates
High PerformerHomeowners wanting strong all-round returnsBalances high performance with your actual state-level electricity usage and available subsidies
Smart StarterHomeowners looking for a fuss-free solutionAn essential system at the lowest possible price

Emily’s estimated investment cost, long-term returns and payback period vary with your roof and location. The three options give you an idea of what might suit your budget, usage and priorities.

How do I choose what to install?

Treat this as a general guide:

  • Not willing to invest a lot but still want the benefits of solar and a battery? Go with the Smart Starter.
  • Planning to maximise incentives? The Rebate Maximiser is built for this.
  • Prioritising performance while staying prudent? The High Performer is designed to get that just right.

What do I see for each proposal?

Each assessment shows an estimated upfront investment, annual bill savings, internal rate of return (IRR) and payback period. You can compare returns and investment side by side without speaking to multiple providers.

What happens next?

Once you request a quote, an accredited installer near you receives your request and works with you to finalise the design. Final pricing and system details are agreed between you and your installer.

Once everything is confirmed, the whole process takes about 4–16 weeks, while the installation itself typically takes only 1–3 days.

Emily, EnergyBrain roof assessment

Get three proposals for your roof

Emily measures your roof from above and shows your saving, payback and return as ranges. About a minute, no sign-up, no installer calls unless you ask.

Start your free assessment

Frequently asked questions

Which solar proposal is best?

It depends on your budget, usage and goals. Compare all three for your address.

Can I change my mind after choosing?

Proposals are estimates. Your installer develops the final design with you.

Do I have to buy a battery?

All of our proposals are solar with a battery by default, but that doesn’t mean you have to install one. Compare the options to see what suits you.

Keep reading

Editorial note (October 2026): figures in Emily’s assessments are estimates based on modelling of Australian rooftops and are not a guarantee of savings, returns or performance for any individual home. Actual results will vary by property. This article is general information, not personalised financial advice.