Your details
Payback period
3.7years
Break even in year 4
- Annual savings
- $1,908
- 25-year ROI
- 581%
Annual savings breakdown
- Daily production
- 29.7 kWh
- Annual production
- 10,841 kWh
- Self-consumption savings
- $1,388
- Export income
- $520
- Total annual benefit
- $1,908
25-year projection
Cumulative savings less the system cost.
- Year 5
- +$2,540
- Year 10
- +$12,079
- Year 15
- +$21,619
- Year 20
- +$31,159
- Year 25
- +$40,698
How to improve your payback
Increase self-consumption
Run appliances during the day when your solar is producing. Use timers for dishwashers, washing machines, and pool pumps.
Add a battery
Store excess solar for evening use. This increases self-consumption to 70 to 80% and reduces reliance on grid electricity.
Time-of-use tariffs
Switch to a time-of-use plan. Solar offsets the most expensive peak rates, maximising your savings per kWh.
Compare retailers
Shop around for the best feed-in tariff and electricity rates. Even small differences add up over 25 years.
See your real payback, on a real quote
Start with the rebate your home could get. One Why Solar Approved installer, one free written quote, and fifteen minutes with a solar expert before you sign.
See my rebateHow this payback calculator works
Enter your system size, installed cost (after STC rebate), state, and self-consumption percentage. The calculator uses state-specific sun hours, electricity rates, and feed-in tariffs to project your annual savings and cumulative return over 25 years.
The payback period is when your cumulative savings exceed your system cost. After that point, your solar system is generating pure profit. Most Australian systems reach payback in 3 to 5 years, with 20+ years of savings remaining.
