System size calculator
What size solar system does your Adelaide home need?
The right size is the one that matches your consumption - oversized systems just export at low feed-in tariffs. This calculator estimates your ideal kW size from your bill, roof orientation and how much power you use during daylight hours.
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Fill in your details and your estimated system size, output and price band will appear here.
How Adelaide system sizing works
Adelaide gets 4.2 to 4.5 peak sun hours a day on annual average, so every 1kW of panels produces roughly 4.2 kWh per day. A 6.6kW system - the most common Adelaide size - produces around 27 kWh a day.
Single-phase Adelaide homes are capped at a 10kVA inverter by SA Power Networks, which is why 6.6kW solar paired with a 5kW inverter is the standard residential setup. To go bigger you usually need three-phase power. The SAPN connection rules guide covers this in full.
For real installed prices by size, see the solar panel cost guide, and to model your return use the payback calculator.
Three pre-vetted installers. Three fixed-price quotes. 48 hours.
Tell us about your roof and your bill. We refer 3 CEC-accredited Adelaide installers who quote fixed-price. You compare. You choose. There is never a fee to you.