Savings calculator · Worked example

Solar and battery for a $1600 quarterly power bill in Brisbane

For a typical household paying $1600 a quarter in Brisbane (4122), the system that pays back best is 8.55 kW solar + 44 kWh battery: $18,011 after rebates, about $5,867 saved in the first year, paid for itself in 3 years and $50,966 ahead after ten. Worked out 26 October 2026 on current prices, rebates and electricity plans.

Work it out for your own bill

The three worth comparing

Best over ten years

8.55 kW solar + 44 kWh battery

18 × JA Solar DeepBlue 4.0 Pro 475W N-Type Double Glass Monofacial (JAM54D40-475/LR) + GoodWe 45kWh 10kW 1-phase

Price after rebates
$18,011
Saving in year one
$5,867
Pays for itself in
3 years
Ahead after 10 years
$50,966

On MYOB powered by OVO · The Free 4 Plan, plan checked 26 October 2026

Solar only: the lowest outlay

9.5 kW solar

20 × JA Solar DeepBlue 4.0 Pro 475W N-Type Double Glass Monofacial (JAM54D40-475/LR) + SolaX 7.5kW SP Hybrid Inverter (2 MPPT)

Price after rebates
$5,408
Saving in year one
$3,038
Pays for itself in
1.8 years
Ahead after 10 years
$30,568

On GloBird Energy · FULLHOUSE Residential (Flexible Energy)-Energex, plan checked 26 October 2026

Another battery to compare

9.98 kW solar + 29 kWh battery

21 × JA Solar DeepBlue 4.0 Pro 475W N-Type Double Glass Monofacial (JAM54D40-475/LR) + ESY 30.7kWh 10kW 1-phase

Price after rebates
$11,792
Saving in year one
$5,250
Pays for itself in
2.2 years
Ahead after 10 years
$50,784

On Origin Energy · Origin Night Shift, plan checked 26 October 2026

How this was worked out

  • A $1600 quarterly bill, turned into daily use at typical Queensland rates for postcode 4122.
  • A typical household's day: no answers about pools, air conditioning or an electric car. Yours can change the answer, so the calculator asks.
  • Every system size the roof and the grid connection allow, with and without each battery we install, priced after the federal battery rebate and solar STCs.
  • Each system on the retail plan that saves it the most, from every plan published for the postcode.
  • Installed by Sunbridge Energy QLD. An estimate, not a quote: a site inspection and your real bill give exact figures.

Other bills

$1300 a quarter$1400 a quarter$1500 a quarter$1700 a quarter$1800 a quarter$1900 a quarter

$1600 in Western Sydney$1600 in Melbourne