Estimate your payback period with live incentive pricing. Adjust your state, system size, electricity rate, and install cost to see real-time results.
System Size50 kW
10 kW200 kW
Estimated Payback Period
2.4 years
Net cost of $46,526 offset by $19,392/yr in savings
System Cost
$60,000
Total Incentives
$13,475
Net Cost After Incentives
$46,526
Annual Electricity Savings
$19,392/yr
Annual Production
64,641 kWh
How commercial solar payback works
How payback is calculated
Payback is the net cost of the system after incentives divided by what it saves you each year. For commercial solar the savings come from three places: the grid power you avoid buying by using solar on site, credits for any surplus you export, and, on a demand tariff, a lower peak charge when solar trims your midday draw.
What moves the number
Self-consumption is the big lever. A business that runs most of its load in daylight — a factory, a cold store, a busy office — uses more of what the panels make and pays the system back faster than a site that only gets going after dark. Your tariff, your time-of-use rates, and how much usable roof you can fill all feed in as well.
A rough guide
Most commercial systems in Australia land somewhere between three and six years, after which the power is close to free for the remaining twenty-plus year life of the panels. Rather than lean on a national average, the calculator above uses your own bill, tariff, and system size to estimate a figure for your site.
Frequently asked questions
What is a typical commercial solar payback period in Australia?
Most commercial solar systems pay back in 3 to 7 years, depending on the state, system size, electricity rate, and the incentives available (STCs, VEECs, or LGCs).
What factors most affect commercial solar payback?
Electricity rate, self-consumption ratio, upfront cost after STC/VEEC rebates, and demand charges. Higher rates and strong daytime consumption shorten the payback period.
Does the state I am in change my solar payback period?
Yes. Incentive zones, feed-in tariffs, and electricity prices vary by state, which can shift payback by one to three years for an otherwise identical system.
How do STCs reduce the upfront cost?
STCs are created at installation and assigned to your installer as a point-of-sale discount. The number of certificates depends on your system size, postcode zone, and the deeming period remaining to 2030. The calculator applies your zone automatically.