A home battery does one thing: it moves the solar you generate during the
middle of the day into the evening, when electricity costs the most and the
grid is under the most strain. Whether that is worth paying for depends almost
entirely on your tariff and how your household uses power — not on the
marketing.
What a battery actually saves you
In Queensland the answer is usually the 4pm-to-9pm window. On a
time-of-use tariff, grid supply in that block runs 30 to 45 cents per
kilowatt-hour, compared with 15 to 25 cents during the day. The battery
discharges into exactly that window.
Three ways a battery earns its cost:
- Peak tariff avoidance. This is where most of the return
comes from. Each kilowatt-hour moved from a 40 cent peak into a 20 cent
off-peak period is worth 20 cents, every day, for ten years. - Self-consumption. Without storage, solar you generate at
midday is exported to the grid at whatever your feed-in tariff pays. If that is
a low rate, storing it yourself and using it at peak is worth more. - Backup. A grid outage no longer means no power. Keep the
fridge, lights, internet and a medical device running. For households with
anyone reliant on powered medical equipment, this is often the deciding
factor rather than the money.
How much battery do you need
Size it to your evening load, not to your solar. A typical Brisbane household
uses between 8 and 14 kWh between 4pm and midnight, and a 10 to 14 kWh battery
covers that well. Larger batteries have diminishing returns unless the
household genuinely runs heavy loads overnight.
There is also a rebate effect worth understanding. The federal discount is
tiered by capacity — the first 14 kWh earns the full rate, 14 to 28 kWh is
counted at 60%, and 28 to 50 kWh at 15%. So a 20 kWh battery does not earn
twice the discount of a 10 kWh one, and the extra storage costs closer to
full price. For most homes, 10 to 14 kWh is the efficient choice.
What we install
We fit SolaX Triple Power batteries and the SolaX HS51 module, plus
Sungrow SBR where that suits the system better. The HS51 is modular LFP
chemistry with more than 6,000 cycles, an aerosol fire suppression system and
IP66 rating — it is a floor-standing or wall-mounted stack that adds capacity
in 5.1 kWh steps as the household’s needs grow.
One thing that catches people out: these batteries are DC-coupled, which
means they need a compatible hybrid inverter. SolaX batteries need a SolaX
hybrid inverter, Sungrow SBR needs a Sungrow hybrid inverter. If you are
installing solar now and thinking about storage later, the inverter decision is
really a battery decision made early.
The federal battery discount
Since 1 May 2026, eligible batteries earn 6.8 Small-scale Technology
Certificates per usable kilowatt-hour, worth roughly $252 to $260 per kWh. On a
10 kWh battery that is about $2,500 to $2,600 off the installed price, applied
directly by your accredited installer. There is no application and no income
test.
On 1 January 2027 the factor drops to 5.7 — roughly 16% less
than today’s rate. On a 10 kWh battery that is about $400 of discount that
simply stops being available.
What a home battery costs in Brisbane
A 10 kWh SolaX Triple Power system installed typically runs between $7,500
and $10,000 before the federal discount, depending on the inverter, the
switchboard and where the battery can physically go. After the discount, most
households land in the $5,000 to $7,500 range.
Send us a recent bill and your address and we will size it to how you
actually use power, with the discount shown as a separate line.
1300 712 020 | Brisbane, the Gold Coast & Ipswich
SolaX and Sungrow storage, CEC-accredited installation, 10-year workmanship
warranty.