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Perth · Secret Harbour
Secret Harbour (6173) is a southern Perth suburb with strong solar potential at 5.9 peak sun hours daily. The area offers good value for solar and battery installations, with typical systems sized at 6.6-10 kW to match household energy patterns. Southern suburbs benefit from reliable grid infrastructure and growing installer competition.
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W/m² irradiance
0 kW
Est. generation now
29.8 kWh
Avg daily yield
Household Type
Monthly Savings
~$206
Based on 6.6kW system, 70% self-consumption, 32c/kWh
Sun Hours
5.9 hrs/day
Annual average peak sun hours for Secret Harbour
DEBS Peak Window
3pm–9pm
Export at 10c/kWh during peak, 2c/kWh off-peak
Western Power Grid: Normal
No planned outages for Secret Harbour (6173). Network operating normally.
Backup Battery: Strongly Recommended
Outer suburbs on the SWIS fringe experience higher outage frequency and longer restoration times due to distance from depots. Backup battery capability is strongly recommended.
110
SAIDI (min/yr)
1.5
Outages/yr
73
Avg duration (min)
Below
ERA benchmark
Common outage causes in this zone:
Backup battery sizing for Secret Harbour:
With an average outage duration of 73 minutes (1.2 hours), a 5 kWh backup-capable battery is typically sufficient to maintain essential loads (lights, fridge, internet, medical equipment). For whole-home backup during longer outages, consider 10-13.5 kWh with backup capability.
Daily Energy Usage
20-28 kWh
Recommended Battery Size
10-13.5 kWh
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