Solar savings calculator
By My Energy Mate Editorial · Last updated
Quick Answer
A 6.6 kW solar system saves roughly A$1,200 to A$2,000 a year in Australian capitals in 2026, paying itself off in 3 to 5 years. Savings depend mostly on how much generation you use directly instead of exporting. Enter your city and usage pattern for your estimate.
Daily generation
25.7 kWh
Year-round average for your location
Annual saving
A$1,597
40% self-used at 38c, rest exported at 3c
Simple payback
4.4 years
Panels are warranted for 25 years
Yields are Bureau of Meteorology long-term averages by capital; real output varies with roof orientation, tilt and shading. A battery raises self-consumption to 70-90%.
Frequently asked questions
How much does a 6.6 kW system save per year?
Roughly A$1,200 to A$2,000 a year in most capitals in 2026, depending on how much you self-consume. At 40% self-consumption in Sydney it saves about A$1,500 annually.
Why does self-consumption matter so much?
Feed-in tariffs pay 0-5 c/kWh while grid power costs 30-45 c/kWh. A kWh you use yourself is worth up to ten times one you export, which is why batteries and load-shifting change the maths.
Are the generation figures realistic?
They are long-term Bureau of Meteorology averages per capital for an unshaded north-ish roof. Heavy shading or poor orientation can cut output 10-25%; a site assessment gives exact numbers.