Savings calculator · Worked example

Solar and battery for a $1700 quarterly power bill in Brisbane

For a typical household paying $1700 a quarter in Brisbane (4122), the system that pays back best is 8.55 kW solar + 52 kWh battery: $20,468 after rebates, about $6,266 saved in the first year, paid for itself in 3.1 years and $54,666 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 + 52 kWh battery

18 × JA Solar DeepBlue 4.0 Pro 475W N-Type Double Glass Monofacial (JAM54D40-475/LR) + GoodWe 54kWh 10kW 1-phase

Price after rebates
$20,468
Saving in year one
$6,266
Pays for itself in
3.1 years
Ahead after 10 years
$54,666

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

Solar only: the lowest outlay

6.65 kW solar

14 × JA Solar DeepBlue 4.0 Pro 475W N-Type Double Glass Monofacial (JAM54D40-475/LR) + Kstar All in One 5.0kW Single Phase Hybrid Inverter

Price after rebates
$4,212
Saving in year one
$2,986
Pays for itself in
1.4 years
Ahead after 10 years
$31,486

On 1st Energy · 1st Emerald - Single Rate, plan checked 26 October 2026

Another battery to compare

9.98 kW solar + 44 kWh battery

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

Price after rebates
$18,639
Saving in year one
$6,266
Pays for itself in
2.9 years
Ahead after 10 years
$53,591

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

How this was worked out

  • A $1700 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

$1400 a quarter$1500 a quarter$1600 a quarter$1800 a quarter$1900 a quarter$2000 a quarter

$1700 in Western Sydney$1700 in Melbourne