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Perth · Mundaring
Solar and battery guidance for Mundaring homes in Eastern Hills. Sized battery options for 20-28 kWh daily usage.
Quick answer
A typical Mundaring home uses 20-28 kWh a day and suits 8-13 kW of solar with a 13.5-20 kWh battery. At current Synergy rates that setup saves about $2,600 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 · Mundaring yield 1,540 kWh/kW
What-if simulator. Drag the timeline + sliders to see how a system would behave on a typical Mundaring day. Weather + grid status update live when the APIs are reachable.
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W/m² irradiance
0 kW
Est. generation now
33.8 kWh
Avg daily yield
Household Type
Annual savings
$2,631
Monthly average
$219
Solar used at home
6,940 kWh/yr
Exported to grid
5,380 kWh/yr
Based on 8 kW solar × 5.1 sun hours × Perth derate, with a 13.5 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
~$219
Based on 8kW system, 70% self-consumption, 33c/kWh
Sun Hours
5.1 hrs/day
Annual average peak sun hours for Mundaring
DEBS Peak Window
3pm–9pm
Export at 10c/kWh during peak, 2c/kWh off-peak
Western Power Grid: Normal
No planned outages for Mundaring (6073). Network operating normally.
837
Solar systems
5.0
MW installed
6 kW
Avg system
Based on Clean Energy Regulator data for postcode 6073. 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
13.5–20 kWh
Large home
20–26 kWh
Retrofit option: AC-coupled retrofits suit established systems
Capacity ranges only — Find My Battery shows you options for the specific brand and model that fits your situation.
Backup Battery: Recommended
Eastern suburbs have average reliability. The mix of established and new infrastructure means outage frequency varies by street. Backup-capable batteries add resilience during summer storm season.
88
SAIDI (min/yr)
1.2
Outages/yr
73
Avg duration (min)
Pass
ERA benchmark
Common outage causes in this zone:
Backup battery sizing for Mundaring:
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.
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 Mundaring 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.
