Fixed tilt
No angle changes
- Annual output / 1 kW
- 1,268 kWh
- Extra vs fixed
- Baseline
Size.Solar
Best solar panel angle in Perth
Start with 30° facing North for a fixed setup. Compare seasonal options, then confirm the result against your roof, shade, and local weather.
Turn this angle into a roof plan
Start with 30° North in Perth, then verify the usable roof area and request installer options.
1. Best fixed tilt & direction
30°
30° facing North. Set it once for the entire year.
Planning basis: latitude and estimated annual solar production.
2. Two adjustments / year
Winter: 37° North
Summer: 24° North
Provides a 1.6% gain over the best fixed tilt.
Planning basis: summer and winter production estimates.
3. Four adjustments / year
Summer16° North
Autumn31° North
Winter48° North
Spring32° North
Offers a 4.7% gain over the best fixed tilt.
Planning basis: four seasonal production estimates.
4. Twelve adjustments / year
Jan16° North
Feb16° North
Mar25° North
Apr32° North
May39° North
Jun48° North
Jul48° North
Aug48° North
Sep39° North
Oct32° North
Nov25° North
Dec16° North
Achieves the maximum 4.7% gain over the best fixed tilt.
Planning basis: twelve monthly production estimates.
*Tilt angles are measured from horizontal. Each non-flat result includes the compass direction the panel faces. Gains are estimates based on modeling.
Quick estimate — not a final quote
Good for a quick comparison. For a quote, check your roof, shade, and local weather in a project.
Quote-ready tilt decision
Give installers one fixed-angle target first
Start the quote conversation with 30° North. Seasonal adjustment is only worth pricing if a supplier can show that roughly 4.7% extra production beats the cost, access risk, and warranty complexity of adjustable frames.
Base quote
30° North
Best default for normal roof-mounted systems and the first number to send to installers.
Adjustable option
Winter: 37° North
Summer: 24° North
Four seasonal changes model about 4.7% gain. Monthly adjustment models about 4.7%.
Installer checks
Roof pitch, available rail angles, wind loading, waterproofing, access for cleaning, and whether adjustment affects warranty.
Direction check
In Perth, the practical target is a north-facing array. Shade-free roof space, inverter sizing, and battery goals usually matter more than small angle differences.
Adjustment payoff · 1 kW reference array
Is changing the panel angle worth it in Perth?
Start with the fixed angle. Four seasonal changes model +60 kWh a year (+4.7%) for each 1 kW of panels. Changing the angle every month adds no modeled annual output beyond the seasonal strategy.
These are latitude-based planning estimates, not a supplier quote. The comparison isolates panel angle; adjustable framing, labour, safe roof access, shade, soiling, and warranty terms can change the practical decision.
Twice yearly
2 changes/year
- Annual output / 1 kW
- 1,288 kWh
- Extra vs fixed
- +21 kWh (+1.6%)
Seasonal
4 changes/year
- Annual output / 1 kW
- 1,328 kWh
- Extra vs fixed
- +60 kWh (+4.7%)
Monthly
12 changes/year
- Annual output / 1 kW
- 1,328 kWh
- Extra vs fixed
- +60 kWh (+4.7%)
View the 12-month output values
Estimated monthly production in kWh for each 1 kW of panels.
| Month | Fixed tilt | Seasonal | Monthly |
|---|---|---|---|
| Jan | 125 kWh | 137 kWh | 137 kWh |
| Feb | 114 kWh | 126 kWh | 126 kWh |
| Mar | 111 kWh | 111 kWh | 111 kWh |
| Apr | 102 kWh | 102 kWh | 102 kWh |
| May | 84 kWh | 84 kWh | 84 kWh |
| Jun | 72 kWh | 79 kWh | 79 kWh |
| Jul | 76 kWh | 84 kWh | 84 kWh |
| Aug | 87 kWh | 95 kWh | 95 kWh |
| Sep | 106 kWh | 106 kWh | 106 kWh |
| Oct | 126 kWh | 126 kWh | 126 kWh |
| Nov | 131 kWh | 131 kWh | 131 kWh |
| Dec | 133 kWh | 147 kWh | 147 kWh |
Compare solar panel angles near Perth
See how the recommended fixed angle changes across nearby cities and latitudes.
- Solar panel angle in MelbourneAustralia · Latitude -37.8°
- Solar panel angle in SydneyAustralia · Latitude -33.9°
- Solar panel angle in BrisbaneAustralia · Latitude -27.5°
- Solar panel angle in AucklandNew Zealand · Latitude -36.8°