Around 5 peak sun hours a day
Solar panels for Perth homes
Perth averages 5 peak sun hours daily: ideal conditions for solar. Calculate your savings, compare quotes from local installers, and start generating your own power.
265+
Sunny days/year
3-5 yr
Payback period
25 yr
Panel warranty
Quick solar estimate
See how much you could save with solar
Modelled 6.6kW Perth household
Illustrative only (your number depends on usage). Run the calculator below.
Why go solar in Perth?
Perth averages around 5 peak sun hours a day, which makes rooftop solar an easy win here. Here's why it adds up for local households.
Cut your power bill
An entry-level 6.6kW system is modelled to save a typical Perth household about $1,200 a year (Synergy A1 tariff, 5 peak sun hours/day, 18 kWh/day of use, 35% self-consumption assumption: run the calculator for your own figure).
Grid power you don't buy
Power your panels make and you use on-site is power you don't import from Synergy. The more you run during daylight, the less you buy.
Increase property value
Studies show homes with solar sell faster and for more. The system adds tangible value from day one.
Energy independence
Lock in $0/kWh for self-consumed power while Synergy keeps raising its rates: the A1 usage rate rose 2.75% at the last annual reset.
Solar system sizes
Choose the right system size for your household. Our calculator below will give you a personalised recommendation.
5kW system
11-12 panels
- Daily output
- About 21 kWh
- Est. annual savings
- About $1,000
- Modelled for a home using about 21 kWh/day.
- Cost (after STC)
- $4,500–$8,000 (priced in the 6.6kW band)
- Best for
- Small households, 1-2 people
6.6kW system
Entry level14-15 panels
- Daily output
- About 28 kWh
- Est. annual savings
- About $1,300
- Modelled for a home using about 28 kWh/day.
- Cost (after STC)
- $4,500–$8,000
- Best for
- The starting point, not the norm: size to your daytime use
10kW system
22-23 panels
- Daily output
- About 43 kWh
- Est. annual savings
- About $1,800
- Modelled for a home using about 43 kWh/day. DEBS pays nothing for export above 5 kW of inverter capacity, so the saving is self-use only.
- Cost (after STC)
- $7,000–$13,000
- Best for
- Large households, pool, EV
13.3kW system
28-31 panels
- Daily output
- About 57 kWh
- Est. annual savings
- About $2,400
- Modelled for a home using about 57 kWh/day. DEBS pays nothing for export above 5 kW of inverter capacity, so the saving is self-use only.
- Cost (after STC)
- $10,000–$19,000
- Best for
- Large homes, high usage, future-proofing
Estimated savings assume Synergy A1 tariff (33.26c/kWh), 5 peak sun hours/day (Perth BOM average), and approximately 35% self-consumption. Actual results vary with your usage pattern, roof orientation, and tariff. Use the calculator below for a personalised figure.
Inverter options
Your inverter converts DC solar power into AC electricity for your home. Picking the right type now can save you a costly swap later.
String inverter
One central unit converts power from all panels. Suits a solar-only install on a simple, unshaded roof. No battery port: adding a battery later means an AC-coupled battery, which in WA counts as an alteration and needs a gateway on Synergy's Supported Solutions List.
Hybrid inverter
The default for a new install. Battery-ready from day one: the battery charges on the DC side while the inverter exports, and you can add it later without replacing your inverter or adding a gateway.
Microinverter
One tiny inverter per panel. Best for shaded or complex roofs. Panel-level monitoring and longest warranties (25 years). Higher upfront cost.
Hybrid inverters (battery-ready)
The default for a new install: add a battery anytime without replacing your inverter
Fronius Primo GEN24 Plus
RecommendedSingle-phase homes wanting a premium hybrid inverter with battery upgrade path
- Power
- 5 kW
- Efficiency
- 97.6%
- Warranty
- 10 years
- Price
- $2,200 - $3,500
Battery compatible: BYD HVS, BYD HVM
Fronius Symo GEN24 Plus
RecommendedThree-phase homes wanting premium hybrid capability
- Power
- 10 kW
- Efficiency
- 97.8%
- Warranty
- 10 years
- Price
- $3,000 - $4,500
Battery compatible: BYD HVS, BYD HVM
Sungrow SH Series
RecommendedBudget-friendly hybrid option with Sungrow battery path
- Power
- 5 kW
- Efficiency
- 97.5%
- Warranty
- 10 years
- Price
- $2,000 - $3,200
Battery compatible: Sungrow SBR HV, Sungrow SBR LV
GoodWe DNS Series
Affordable hybrid inverter with wide battery compatibility
- Power
- 5 kW
- Efficiency
- 97.8%
- Warranty
- 10 years
- Price
- $1,800 - $2,800
Battery compatible: BYD HVS, BYD HVM, Pylontech US3000
String inverters
Solar only, when no battery is planned
SolarEdge SE Series (with optimisers)
Roofs with partial shading or complex orientations
- Power
- 5 kW
- Efficiency
- 99.2%
- Warranty
- 12 years
- Price
- $2,500 - $4,000
No battery port. A battery later means an AC-coupled addition with WA's alteration and gateway rules
Sungrow SG Series
Solar-only installations where no battery is planned
- Power
- 5 kW
- Efficiency
- 98.4%
- Warranty
- 10 years
- Price
- $1,200 - $2,000
No battery port. A battery later means an AC-coupled addition with WA's alteration and gateway rules
ABB/FIMER UNO-DM Plus
Budget-conscious installations where battery is not planned
- Power
- 5 kW
- Efficiency
- 97.0%
- Warranty
- 10 years
- Price
- $1,000 - $1,500
No battery port. A battery later means an AC-coupled addition with WA's alteration and gateway rules
Microinverters
Per-panel optimisation for complex or shaded roofs
Enphase IQ8+
Maximum panel-level optimisation and longest warranty (need ~20 units for 6.6kW system)
- Power
- 300W per panel
- Efficiency
- 97.5%
- Warranty
- 25 years
- Price
- $200 - $250
Battery compatible: Enphase IQ Battery
Want prices for your roof? Tell us about your place once and we match you with up to three WA installers in the WattMate network who quote against your actual usage.
Calculate your solar savings
Enter your details below to get a personalised solar savings estimate based on Perth conditions and current WA rates.
Solar rebates & incentives in WA
Take advantage of government rebates and incentives to reduce your solar installation costs.
Small-scale Technology Certificates (STCs)
Federal rebate applied at point of sale. Value varies by system size and location, and steps down each January until 2030.
All residential solar installations
Synergy Export Credits (DEBS)
Get paid for excess solar exported to the grid. DEBS pays 10c/kWh during peak hours (3pm–9pm) and 2c/kWh at other times.
New solar systems connected from Oct 2020 onwards
Midday Saver Tariff
Shift heavy appliance use to midday when solar is generating and rates are lowest.
Households with solar and smart meter
New WA rules (from 1 May 2026): the connection standards on the main Perth and South West grid (SWIS: The electricity network most WA homes are connected to.) for new and upgraded solar and battery systems have changed — ask your installer to confirm the system will be compliant and granted Authority to Operate (ATO) by Western Power.
View All WA RebatesGoes well with solar
Maximise your solar investment with these complementary solutions.
- Solar panelsYou are here
Generate your own power for use at home.
Store your solar energy for evening use
Charge your car with free solar energy
Run the numbers
Open the full calculator
Estimate system costs, bill savings, and payback across solar, battery, EV charging, and heat pumps using your household energy use.
See example savings
In one modelled scenario, a Joondalup family cuts its bills by 72% with a 6.6 kW system and battery. See more example Perth scenarios.
Is now a good time to buy?
Panel prices, STC values, and installer availability all shift throughout the year. Check live market conditions before committing.
Frequently asked questions
Common questions about solar panels for Perth homes.
How much do solar panels cost in Perth?
An entry-level 6.6kW solar system in Perth is modelled at $4,500–$8,000 after the STC rebate, from budget to premium equipment. Prices vary based on panel quality, inverter brand, and installation complexity.
What's the payback period for solar in WA?
For a typical Perth home, the modelled payback on an entry-level 6.6kW system is about 5 years. Actual results vary with usage patterns and tariff.
How much can I save with solar panels?
An entry-level 6.6kW system is modelled to save a typical Perth home about $1,200 a year on 18 kWh/day of use, depending on usage patterns and tariff. Over 25 years, modelled cumulative savings come to about $40,000 (use our calculator for your own numbers).
Do I need batteries with solar?
Not necessarily. Many Perth households achieve great savings with solar-only systems by using appliances during the day. Batteries make sense if you use most power at night or want backup power.
What happens when it's cloudy?
Solar panels still generate power on cloudy days, just less than full sun. Perth averages around 5 peak sun hours a day (the BOM measure of usable solar energy), among the best in the country.
Related guides
Perth solar panel installation: what size system do you need?
A practical guide to sizing your solar system in Perth. Work out a size from your household's electricity usage, roof space and plans, and judge it over the system's life, not the first year.
Best solar panels for Perth in 2026: what installers are actually recommending
Aiko, LONGi, Jinko and REC compared for Perth conditions: installer sentiment, efficiency, warranty terms, and what the temperature coefficient means for a hot WA roof.
PERC vs TOPCon vs HJT solar panels: which technology suits Perth?
PERC, TOPCon, and HJT are the three solar cell technologies you'll see on Perth quotes. Here's how they compare on heat performance, degradation, efficiency, and value, and which one fits a Perth roof.
What 'tier 1 solar panels' actually means: why the term is misleading for Perth buyers
Perth solar quotes often describe panels as 'tier 1' as a quality marker. But 'tier 1' is a financing classification that says nothing about panel quality, reliability, or performance. Here's what the term actually means.
Already have solar?
Check if your system is generating what it should be
Enter your system size and today's generation to check performance. Find your daily generation in your inverter app or monitoring portal.
Find out what solar saves you.
Run your numbers, then connect with Perth installers in the WattMate network. Takes about 2 minutes.