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Perth · South Perth
Solar and battery guidance for South Perth's riverside homes. Strong solar generation and a mix of detached homes and apartments shape what's possible here.
Quick answer
A typical South Perth home uses 14-20 kWh a day and suits 5-8 kW of solar with a 10-13.5 kWh battery. At current Synergy rates that setup saves about $1,800 a year, and the WA Battery Scheme covers up to $1,300 of the battery.
Sources: SBP suburb estimates · Synergy A1 33.26c/kWh · WA Battery Scheme · South Perth yield 1,620 kWh/kW
What-if simulator. Drag the timeline + sliders to see how a system would behave on a typical South Perth 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
$1,766
Monthly average
$147
Solar used at home
4,697 kWh/yr
Exported to grid
3,404 kWh/yr
Based on 5 kW solar × 5.1 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
~$147
Based on 5kW system, 70% self-consumption, 33c/kWh
Sun Hours
5.1 hrs/day
Annual average peak sun hours for South Perth
DEBS Peak Window
3pm–9pm
Export at 10c/kWh during peak, 2c/kWh off-peak
Western Power Grid: Normal
No planned outages for South Perth (6151). Network operating normally.
2,187
Solar systems
13.6
MW installed
6.2 kW
Avg system
Based on Clean Energy Regulator data for postcode 6151. WA has 580,796 registered solar installations totalling 3.33 GW, the highest per-capita rooftop solar adoption rate in Australia.
Data to July 2026. Licensed from the Clean Energy Regulator, Commonwealth of Australia under a Creative Commons Attribution 4.0 licence.
Standard home
10–13.5 kWh
Large home
13.5–20 kWh
Retrofit option: AC-coupled retrofits work well on established systems
Capacity ranges only — Find My Battery shows you options for the specific brand and 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 South Perth:
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.
Statewide support
WA Battery Scheme
Capped at 10 kWh, Synergy customers
$1,300
up to
Federal STCs
13.5 kWh battery example. 6.8 STCs/kWh times ~$39.9
~$3,631
rebate
Interest-free loan
Available alongside the rebate for eligible households
$10k
up to
Rebates also apply to retrofit installations on existing solar.
Ongoing earnings
Synergy Battery Rewards
Up to 30 dispatch events a year, 2-4 hours each
30
events/yr
Event payment
Paid per kWh your battery exports during a dispatch event
$0.70
per kWh
Typical annual earnings
For a 10-13 kWh battery across 15-25 events at 70c/kWh
~$100-180
per year
VPP enrolment is mandatory for the WA battery rebate from May 2026.
Compare quotes from SAA-accredited local installers — you choose which to act on. No obligation, no pressure.
Tell us about your home and energy use. We connect you with verified WA installers covering South Perth for free, no-obligation quotes.
Get free quotes →AS/NZS 5139 clearance rules, garage vs outdoor walls, and what installers check on-site.
A step-by-step method covering evening usage and seasonal AC demand.
Activation events credit 70¢/kWh on top of DEBS exports, and signing up is a WA rebate condition.