Calculators

Perform the calculation you need

Your home

Average quarterly electricity bill$650

We convert this to your annual usage in kWh.

Main roof orientation

Shading across the dayNone

Trees, neighbouring buildings, chimneys, aerials.

Usable roof spaceModerate (~30 panels)

Roughly how many panels fit on the good sections.

Power used in the evening / overnight55%

More evening use means a battery earns its keep faster.

Plans for the next 1–3 years

Electric vehicleAdds ~3,500kWh/yr

Pool or ducted A/CAdds ~2,000kWh/yr

Include a batteryFederal + NSW rebates apply

Blackout backupExtra headroom

Recommended system

8kW solar

13.5kWh battery

Right-sized to cover most of your usage with evening cover.

Annual saving

estimate / yr

Payback

years

CO₂ cut

tonnes / yr

Indicative installed price$0

STC solar discount$0

Federal battery rebate$0

NSW PDRS battery incentive$0

Your price after incentives$0

Incentives 30%You pay 70%

Annual generation0 kWh

Used in your home (self-consumption)0 kWh

Exported to the grid0 kWh

Panels needed at 440W0

Matching equipment from our confirmed range

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Estimates only, for planning — your actual result depends on your tariff, roof, usage and the products chosen. Rebate and tariff figures are current as of August 2026: the federal Cheaper Home Batteries Program (tiered per-kWh via STCs), the NSW PDRS battery incentive and the STC discount on new solar all step down on a set schedule, and we confirm the exact value at quote. Verify current values with the Clean Energy Regulator and NSW Government.