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Should I install a battery during the build?

Compare both options rather than assuming later will be cheaper. The federal Cheaper Home Batteries Program currently provides substantial support for eligible systems, while a new build may make electrical planning easier. If you defer the battery, leave suitable space, switchboard capacity and cable pathways so a later installation is straightforward.

What's a hybrid inverter?

A hybrid inverter is a solar inverter that is compatible with a battery. A standard solar inverter cannot connect to a battery. If you plan to add a battery later, install a hybrid inverter during the build (or when you install solar). The upgrade cost ($500–$1,500) is much less than replacing the inverter later.

How long do home batteries last?

Most lithium-ion home batteries have a warranty of 10 years or 10,000 cycles (whichever comes first), with most retaining 70–80% capacity at the end of the warranty. Real-world lifespan may be longer. When calculating ROI, assume a 10–15 year lifespan and factor in the cost of replacement.

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Energy Efficiency & Smart Home

Battery Storage Preparation: What to Plan for Future Battery

What to plan during construction for future battery storage — space, wiring, inverter location.

5 min read·Compare My Build — Independent Resource· Updated September 2026

Cost estimates only: Any building or upgrade figures in this guide are indicative, not fixed prices or quotes. Costs and inclusions vary by project, supplier, location and time. Confirm current written prices and specifications directly with your builder, suppliers and relevant trades.

Key Takeaways

A home battery stores solar power for use at night, increasing energy independence
Battery provisions (space, wiring, circuit) are cheap during the build and expensive to retrofit
Battery-ready provisions are useful even if you have not decided whether to install a battery during the build
Batteries require a suitable location (garage, laundry), ventilation and a dedicated circuit
Not all homes benefit from a battery — calculate your night-time usage before investing

A home battery can store solar energy for later use and may reduce grid purchases at higher-priced times. Since 1 July 2025, the Australian Government Cheaper Home Batteries Program has supported eligible solar-connected batteries through the SRES, with around a 30% installation discount. From 1 May 2026 the STC support is tiered by usable battery capacity and adjusts over time. Compare the current after-incentive installed price before deciding whether to install now or later.

Why Plan for a Battery Now?

Battery prices, products and incentives change over time, so there is no reliable rule that waiting will always be cheaper. Planning suitable space, switchboard capacity and cable pathways during the build preserves flexibility whether you install a battery immediately or later.

Battery Provisions to Plan

Space — a designated space for the battery (typically in the garage or laundry); batteries are roughly the size of a small suitcase
Wiring — a pre-installed circuit from the solar inverter to the battery location, so the battery can be connected without running new cables
Switchboard space — ensure the switchboard has space for battery circuit breakers and protection devices
Ventilation — some batteries require ventilation; ensure the designated space has adequate airflow
Inverter compatibility — if you install a solar inverter during the build, ensure it's battery-compatible (hybrid inverter) so a battery can be added later
Conduit — a conduit from the inverter to the battery location for easy cable installation

Tip

If you plan to add a battery later, ask your builder about a 'battery-ready' provision package. This typically includes the space, wiring, conduit and switchboard space for a future battery, at a fraction of the retrofitting cost. A hybrid solar inverter (battery-compatible) costs slightly more than a standard inverter but saves significant retrofitting costs later.

Battery Types and Sizes

Lithium-ion — the most common; high energy density; long lifespan (10+ years); lighter; more expensive
Lithium iron phosphate (LiFePO4) — safer chemistry; longer lifespan; slightly lower energy density; increasingly popular
Capacity — home batteries range from 5kWh to 15kWh+; a typical Australian home uses 15–25kWh per day
Backup power — some batteries provide backup power during grid outages; others don't; check if this is important to you

Is a Battery Worth It?

Battery economics vary widely. The result depends on the current installed price after incentives, usable capacity, solar surplus, time-of-use tariffs, export rates, battery efficiency, warranty and how much stored energy you can actually use. Financial payback is only one reason households may consider a battery; other benefits can include:

Energy independence — use your own solar power at night, reducing grid reliance
Backup power — some batteries provide power during grid outages
Load shifting — store lower-cost or excess solar energy for use at a more valuable time
Environmental benefit — maximise your use of clean solar power

Use your interval or smart-meter data to estimate how much solar you export and how much electricity you import outside solar-generation hours. A battery has more opportunity to save money when there is enough surplus energy to charge it and enough later demand to discharge it. Also check time-of-use tariffs, backup requirements and any virtual power plant conditions.

Example Battery Costs

Item	Example Cost
Battery provisions (during build)	$200–$800
Hybrid inverter upgrade (battery-compatible)	$500–$1,500
Battery (5kWh, supply and install)	$5,000–$9,000
Battery (10kWh, supply and install)	$8,000–$15,000
Battery (13kWh+, supply and install)	$10,000–$20,000+

Illustrative historical price ranges only. The Cheaper Home Batteries Program can materially change the current installed cost, and support is tiered by usable capacity from 1 May 2026. Obtain current after-incentive quotes before budgeting.

Questions to Ask Your Builder

Can you include a 'battery-ready' provision package — space, wiring, conduit and switchboard space?
If I install a solar inverter now, is it a hybrid (battery-compatible) inverter?
Where would the battery be located, and is there adequate ventilation?
How much space should be left for a future battery, and what size would fit?
Are there government incentives for batteries in my state that I should factor in?

Common Mistakes to Avoid

Installing a standard (non-hybrid) solar inverter and having to replace it to add a battery later
Not leaving a designated battery space, then having to retrofit wiring through finished walls
Comparing battery sticker prices without checking the current Cheaper Home Batteries Program discount, usable capacity, tariff assumptions and backup features
Forgetting that a battery only makes sense if you use most of your power at night

Builder Tips

Plan battery provisions during the build even if you are undecided — then compare the current after-incentive price of installing during the build versus later
A hybrid inverter costs only slightly more than a standard one but saves a full inverter replacement later
Locate the battery in the garage or laundry near the switchboard to keep cable runs short
Calculate your night-time usage before committing to a battery — some households don't need one

Solar Ready Home Checklist

Plan solar and battery provisions together.

Read the Guide