How much does a solar battery cost in Australia in 2026?

Fully installed, most home batteries cost around $1,000–$1,300 per kWh of storage. A typical 10kWh battery lands between $9,500 and $13,500 installed, before the federal Cheaper Home Batteries rebate.

How long does a solar battery take to pay back?

For most Australian households with existing rooftop solar and a power bill above $400 a quarter, payback lands between 6 and 10 years. Higher bills, time-of-use tariffs and adding solar at the same time shorten that window.

Is a 5kWh or 10kWh battery better?

5kWh suits smaller households or a top-up buffer. 10kWh is the sweet spot for a family of four using air-con and hot water in the evening. Anything over 13kWh is usually only worth it if you have an EV or work from home.

2026 Battery Cost Guide

How much does a solar battery actually cost in Australia?

Real installed prices for 2026 by size and brand, what drives the cost up or down, and how long you'll wait to break even. No sales spin — just the numbers.

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Home solar battery unit mounted on garage wall

Price by size

Installed prices by battery size

Prices below are typical fully-installed ranges across Australia in 2026, before the federal Cheaper Home Batteries rebate. Expect the low end for straightforward metro installs and the high end for regional, tricky switchboards or premium brands.

Size	Installed price	Best for
5 kWh	$5,500 – $7,500	Small home, evening top-up
10 kWh	$9,500 – $13,500	Family of 3–4, most common size
13.5 kWh	$12,500 – $16,500	High usage, EV owners, all-electric homes
20 kWh+	$18,000 – $26,000	Off-grid ambitions or medium businesses

Rule of thumb: ≈ $1,000–$1,300 per kWh installed. Cheaper per-kWh at larger sizes; premium brands (e.g. Tesla) sit at the top of each range.

Popular brands

What the leading brands actually cost

Brand	Sizes available	Installed price
Tesla Powerwall 3	13.5 kWh	$13,500 – $15,900
Sungrow SBR	9.6 – 25.6 kWh (modular)	$8,900 – $19,500
BYD Battery-Box Premium	5 – 22.1 kWh (modular)	$6,500 – $18,000
AlphaESS Smile	5 – 15 kWh	$6,900 – $14,500
GoodWe Lynx Home	6.6 – 16.4 kWh	$7,500 – $15,000

What moves the price

Why two quotes for "the same battery" differ by thousands

Switchboard & wiring

Older switchboards often need an upgrade to safely connect a battery. Budget $500–$1,500 extra if yours is pre-2000s.

Install location

Garage wall installs are cheap. Rooftop, outdoor-only or long cable runs from the meter box add labour and materials.

Backup capability

Full whole-home backup needs an extra gateway or transfer switch — usually $1,000–$2,500 on top of the battery.

Solar bundled or not

Adding solar at the same time is cheaper per-kW than retrofitting later, and lifts the effective rebate on the whole system.

Rebates & payback

Cheaper Home Batteries rebate + typical payback

Federal rebate

The Cheaper Home Batteries Program discounts around $335 per usable kWh in 2026 — roughly $3,300 off a 10kWh battery, applied upfront by the installer.

State schemes

NSW, VIC and the ACT stack extra loans or rebates on top. Your installer applies eligible ones automatically.

Payback window

6–10 years for most homes with existing solar and a bill above $400/quarter. Faster with high evening usage or a time-of-use tariff.

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The only way to know your actual price is to compare — different installers price the same battery differently. Free, no obligation.

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