Around 5 peak sun hours a day
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.
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.
A typical 6.6kW system is modelled to save Perth households $1,500-$2,500/year depending on usage patterns and self-consumption (Synergy A1 tariff, 5 peak sun hours/day, 30% self-consumption assumption: run the calculator for your own figure).
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.
Studies show homes with solar sell faster and for more. The system adds tangible value from day one.
Lock in $0/kWh for self-consumed power while Synergy rates keep climbing 3-4% per year.
Choose the right system size for your household. Our calculator below will give you a personalised recommendation.
12-14 panels
16-18 panels
24-28 panels
32+ panels
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.
Your inverter converts DC solar power into AC electricity for your home. Picking the right type now can save you a costly swap later.
Best value for simple rooftops with good sun exposure. One central unit converts power from all panels. Most affordable option but no battery path.
Battery-ready from day one. Add a battery later without replacing your inverter. Costs a little more now, but you skip a full inverter swap when you add a battery later.
One tiny inverter per panel. Best for shaded or complex roofs. Panel-level monitoring and longest warranties (25 years). Higher upfront cost.
Best value for straightforward installations
Roofs with partial shading or complex orientations
Battery compatible: Tesla Powerwall (via AC coupling)
Best value string inverter for straightforward rooftop installations
No direct battery path -- add AC-coupled battery later if needed
Budget-conscious installations where battery is not planned
No direct battery path -- add AC-coupled battery later if needed
Add a battery anytime without replacing your inverter
Single-phase homes wanting a premium hybrid inverter with battery upgrade path
Battery compatible: BYD HVS, BYD HVM
Three-phase homes wanting premium hybrid capability
Battery compatible: BYD HVS, BYD HVM
Budget-friendly hybrid option with Sungrow battery path
Battery compatible: Sungrow SBR HV, Sungrow SBR LV
Affordable hybrid inverter with wide battery compatibility
Battery compatible: BYD HVS, BYD HVM, Pylontech US3000
Per-panel optimisation for complex or shaded roofs
Maximum panel-level optimisation and longest warranty (need ~20 units for 6.6kW system)
Battery compatible: Enphase IQ Battery
Want prices for your roof? Tell us about your place once and we match you with up to three SAA-accredited WA installers who quote against your actual usage.
Enter your details below to get a personalised solar savings estimate based on Perth conditions and current WA rates.
Take advantage of government rebates and incentives to reduce your solar installation costs.
Federal rebate applied at point of sale. Value varies by system size and location.
All residential solar installations
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
Shift heavy appliance use to midday when solar is generating and rates are lowest.
Households with solar and smart meter
Maximise your solar investment with these complementary solutions.
Generate your own power for use at home.
Store your solar energy for evening use
Charge your car with free solar energy
Estimate system costs, bill savings, and payback across solar, battery, EV charging, and heat pumps using your household energy use.
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.
Panel prices, STC values, and installer availability all shift throughout the year. Check live market conditions before committing.
Common questions about solar panels for Perth homes.
A quality 6.6kW solar system in Perth typically costs $5,500 - $7,500 after the STC rebate. Prices vary based on panel quality, inverter brand, and installation complexity.
Most Perth households see a modelled payback period of 3-5 years. With current electricity prices and Perth's excellent sunshine, modelled returns typically reach 15-25% per year. Actual results vary with usage patterns and tariff.
A 6.6kW system is modelled to save $1,500-$2,000 per year depending on usage patterns and tariff. Over 25 years, modelled cumulative savings can exceed $40,000 (use our calculator for your own numbers).
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.
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.
A practical guide to sizing your solar system in Perth. Calculate the right system size based on your household's electricity usage, roof space, and budget.
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, 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.
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.
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.
Run your numbers, then connect with SAA-accredited Perth installers. Takes about 2 minutes.
