Panel Tilt and Direction in Australia: Getting the Most From Your Panels

In Australia the sun sits in the northern part of the sky, so panels facing north catch the most energy across the year.

1. Direction

• North gives the most yearly energy.
• East or west often gives somewhere around 10 to 20% less over the year, but spreads output into the morning or afternoon. That can suit you if you use power then.
• South facing panels lose a lot, especially in winter. Avoid them unless the pitch is very flat.

2. Tilt

A good starting point is a tilt about equal to your latitude.

• Steeper (latitude plus about 15°) favours winter. Good for off-grid systems that run short in winter.
• Flatter (latitude minus about 15°) favours summer.
• Keep at least about 10° so rain can wash the panels.

3. Roof pitch is often good enough

Most roofs aren't at the perfect angle, and that's usually fine. Being 10 to 15° off the ideal often costs only a few percent. Tilt frames add cost, wind load and roof penetrations.

4. Quick summary

• Face north if you can.
• Tilt about equal to latitude for year-round output.
• Go steeper for winter-heavy off-grid systems.
• Try the Panel Tilt Angle Calculator.

In Australia, any work on 240V AC wiring, including connecting an inverter, battery or solar system to a switchboard or fixed wiring, must be done by a licensed electrician.

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