Perth is one of the best places in Australia to install solar — thanks to abundant sunshine, competitive solar prices, and growing feed‑in incentives. Whether you’re new to solar or comparing options, this guide covers how solar works in Perth, typical costs, rebates, feed‑in credits, system sizing and tips to maximise your savings.
🌞 Why Perth Is Ideal for Solar
Perth enjoys among the highest solar generation potential in Australia, with around 5.8 peak sunlight hours per day on average — meaning more electricity production compared with many other cities. For example, a 6.6 kW system could generate roughly 28–30 kWh per day, easily offsetting typical household daytime usage.
Across Western Australia, residential solar saturation is high — with nearly half of detached homes installing solar, contributing over 3 GW of clean energy capacity statewide.
💰 Typical Solar System Costs in Perth
Solar system prices have dropped substantially compared with past years, and Perth often has lower costs than the national average due to strong competition.
📊 Indicative Installed Prices (After Federal Rebate)
System Size Typical Price (AUD)
3 kW ~$3,000 – $4,000
5 kW ~$5,000 – $6,000
6.6 kW ~$6,000 – $7,500
10 kW ~$9,000 – $15,000+
These prices usually include the federal Small‑scale Technology Certificate (STC) rebate passed on at the point of sale, which can lower costs by roughly 20–30 %.
Example: A 6.6 kW system in Perth often costs under $5,000–$6,000 after rebates — making it one of the most cost‑effective places to go solar.
📈 Solar Savings & Payback
Depending on your usage and feed‑in tariff, solar systems in Perth typically pay for themselves in 3–4 years, after which most energy produced contributes to ongoing savings.
Savings depend on:
· Electricity consumption habits
· System size & panel efficiency
· Feed‑in tariff rates & export timing
· Self‑consumption level
A 6.6 kW system might generate ~25–30 kWh daily — enough to significantly reduce grid electricity purchases for many Perth households.
🔁 Feed‑In Tariffs (DEBS)
Perth solar households can join Synergy’s Distributed Energy Buyback Scheme (DEBS) or equivalent feed‑in arrangements, earning credits when excess solar energy is exported:
· Peak exports (late afternoon/evening): ~10 ¢/kWh
· Off‑peak exports: ~2 ¢–3 ¢/kWh
While these rates are modest compared with daytime retail prices, they still boost annual savings — especially if you export surplus production during peak times.
Tip: Maximising self‑consumption (using solar while it’s generated) usually increases savings more than exporting, so timing loads like washing or pool pumps for daytime can help.
🏠 How Many Panels Does Perth Need?
System size depends on your roof and energy goals. In Perth:
· 10–12 panels (~3–4 kW): Good for smaller homes or moderate daytime usage
· 15–20 panels (~5–6.6 kW): Ideal for most family households
· 20+ panels (~8–10 kW+): For larger homes or high usage (e.g., EV charging, pool equipment)
Quality panel choice, orientation (north is best but east/west still effective), and shading all affect output.
🔌 Installing Solar in Perth — What to Expect
📍 1. Consultation & Site Assessment
A reputable installer will evaluate your roof, consumption patterns, and goals to design a tailored system.
📏 2. System Design & Quotes
You’ll receive a detailed quote with estimated savings, panel and inverter specs, and timelines.
📄 3. Approvals & Paperwork
Your installer should handle STC rebate paperwork and submit necessary grid connection applications (e.g., to Western Power or local network).
🛠 4. Installation & Connection
Once approved, installation is usually quick (often a day or two), followed by inspection and grid connection.
📊 5. Monitoring & Maintenance
Most systems include online monitoring and require minimal upkeep — periodic cleaning and inspection help performance over the years.
🧠 Solar Batteries & Future‑Proofing
Adding a solar battery lets you store daytime production for evening use, increasing self‑sufficiency and reducing grid reliance. Federal rebates like the Cheaper Home Batteries Program continue to make storage more affordable, though pricing and local incentives can vary.
If you plan to add a battery later, choose a battery‑ready inverter now to simplify upgrades and keep long‑term costs lower.
📌 FAQs — Solar in Perth
Q: Is solar worth it in Perth? Yes — abundant sunshine, competitive system costs and decent payback periods (often 3‑4 years) make solar a strong investment for Perth homes.
Q: Do I need council approval? Most residential solar installs in Perth don’t require council planning approval, but your installer will confirm local requirements and handle approvals.
Q: What size system should I install? A 5–6.6 kW system suits many Perth households, balancing cost and generation capacity. Larger systems are great if you have higher daytime use or plan to add storage.
Q: Do export rates change? Feed‑in tariff rates can change with energy retailer policies, so confirm current rates with your provider before installing.
🏁 Conclusion — Perth Leading the Solar Charge
Perth ranks among Australia’s most solar‑friendly cities thanks to strong sunshine, competitive pricing and solid federal incentives. A well‑designed solar system can deliver substantial electricity bill savings, reduce grid reliance and pay for itself in only a few years.
Whether you’re upgrading your home or planning a new build, Arise Solar can help assess your roof, calculate expected solar generation, recommend the perfect system size and walk you through rebates and installation — contact us for a personalised Perth solar quote today