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Perth · Subiaco
Solar and battery guidance for Subiaco's character homes and inner-city apartments. Heritage rules and tight roof space shape installation choice; compact battery units suit older properties.
What-if simulator. Drag the timeline + sliders to see how a system would behave on a typical Subiaco day. Weather + grid status update live when the APIs are reachable.
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W/m² irradiance
0 kW
Est. generation now
22.2 kWh
Avg daily yield
Household Type
Annual savings
$2,122
Monthly average
$177
Solar used at home
6,205 kWh/yr
Exported to grid
1,895 kWh/yr
Based on 5 kW solar × 5.9 sun hours × Perth derate, with a 10 kWh battery offsetting peak-rate Synergy A1 usage and exporting the surplus at DEBS peak/off-peak rates. Real savings depend on your specific tariff plan, usage pattern, and installation — an installer confirms the final quote.
Monthly Savings
~$177
Based on 5kW system, 70% self-consumption, 32c/kWh
Sun Hours
5.9 hrs/day
Annual average peak sun hours for Subiaco
DEBS Peak Window
3pm–9pm
Export at 10c/kWh during peak, 2c/kWh off-peak
Western Power Grid: Normal
No planned outages for Subiaco (6008). Network operating normally.
Capacity ranges only — Find My Battery matches you to the specific brand + model that fits your situation.
Backup Battery: Recommended
Southern metro suburbs have slightly above-average outage frequency. A battery with backup capability keeps essential circuits running during summer storms, which cause most unplanned outages in this zone.
85
SAIDI (min/yr)
1.1
Outages/yr
77
Avg duration (min)
Pass
ERA benchmark
Common outage causes in this zone:
Backup battery sizing for Subiaco:
With an average outage duration of 77 minutes (1.3 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.
WA Battery Scheme: Up to $1,300 (capped at 10kWh, Synergy customers)
Federal STCs: ~$4,500 for a 13.5kWh battery (8.4 STCs/kWh × ~$39.9, Jan–Apr 2026)
Interest-free loan: Up to $10,000 available
Rebates also apply to retrofit installations on existing solar.
Programme: Synergy Battery Rewards
Events: Up to 30/year (2–6 hours each)
Payment: $0.70/kWh exported during events
Annual earnings: ~$100–180 for a 10–13kWh battery (15–25 events × 70¢/kWh)
VPP enrolment is mandatory for the WA battery rebate from May 2026.
