Savings calculator · Worked example

Solar and battery for a $2200 quarterly power bill in Brisbane

For a typical household paying $2200 a quarter in Brisbane (4122), the system that pays back best is 9.98 kW solar + 44 kWh battery: $18,639 after rebates, about $7,102 saved in the first year, paid for itself in 2.6 years and $62,848 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

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
$7,102
Pays for itself in
2.6 years
Ahead after 10 years
$62,848

On GloBird Energy · FOUR4FREE Residential (Flexible Rate)-Energex, plan checked 26 October 2026

Solar only: the lowest outlay

7.6 kW solar

16 × 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
$4,630
Saving in year one
$3,810
Pays for itself in
1.2 years
Ahead after 10 years
$40,804

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

Another battery to compare

9.98 kW solar + 37 kWh battery

21 × JA Solar DeepBlue 4.0 Pro 475W N-Type Double Glass Monofacial (JAM54D40-475/LR) + SolaX 40.8kWh 10kW 1-phase

Price after rebates
$17,572
Saving in year one
$6,900
Pays for itself in
2.5 years
Ahead after 10 years
$61,625

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

How this was worked out

  • A $2200 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

$1900 a quarter$2000 a quarter$2100 a quarter

$2200 in Western Sydney$2200 in Melbourne