Solar Panels Cairns
Compare costs, check rebates, and get your free personalised solar score for Cairns in 60 seconds.
Get My Solar Score — Cairns ☀LAST UPDATED: MAY 2026 · DATA: CLEAN ENERGY REGULATOR & STATE SOURCES
KEY TAKEAWAYS — CAIRNS
• 6.6kW system: $4,200–$6,800 after rebates — saving $1,600–$2,100/year
• Peak sun hours: 5.4h/day — excellent solar potential
• Electricity rate: 30c/kWh — every kWh of solar used directly saves this amount
• STC Zone 1: worth approximately $2,050 off a 6.6kW system
• Typical payback: 3–5 years, then 20+ years of free electricity
In This Guide
Cairns Suburbs
Solar in Cairns
Cairns has the tropical sun to drive excellent solar output, but the wet season (December–April) brings heavier cloud cover that reduces generation during those months. The rest of the year more than compensates, and annual output is still well above the national average. A/C costs are significant year-round, making solar savings strong.
💡 Local Tip
Cairns' wet season can deposit debris and mould on panels. Consider scheduling an annual clean at the end of the wet season (April/May) to restore peak performance for the dry months.
With an average system cost of $4,200–$6,800 for a 6.6kW installation after federal rebates, Cairns homeowners typically recoup their investment within 3–5 years. For a detailed breakdown of pricing factors, see our national solar cost guide. To understand all the rebates available in QLD, read our QLD rebate guide.
What Does Solar Cost in Cairns?
Prices shown are after federal STC rebates (Zone 1). Actual costs vary by installer, panel brand, and roof complexity.
| System Size | Panels | Daily Output | Cost After STCs | Annual Savings | Payback |
|---|---|---|---|---|---|
| 5kW | 12–14 | 22–25 kWh | $4,000–$5,250 | $1,111–$1,360 | 3–5 yrs |
| 6.6kW | 15–18 | 29–33 kWh | $4,200–$6,800 | $1,600–$2,100 | 3–4 yrs |
| 10kW | 24–28 | 44–50 kWh | $6,000–$9,500 | $2,600–$3,400 | 3–5 yrs |
| 13kW | 30–36 | 58–65 kWh | $7,800–$13,650 | $2,626–$3,241 | 3–5 yrs |
Adding a home battery to your Cairns solar system increases self-consumption from ~35% to ~70%, reducing your reliance on grid electricity during expensive evening hours. At current QLD feed-in rates of 5.0c/kWh — among the lowest in Australia — a battery's value proposition is strong, storing excess solar for evening use saves significantly more than exporting it. See our battery guide for costs and payback analysis. Your inverter choice also matters — read our inverter guide to understand your options.
Solar Rebates in Cairns
FEDERAL STCs (Zone 1)
Small-scale Technology Certificates are applied as a point-of-sale discount. Zone 1 (highest value) — worth approximately $2,050 on a 6.6kW system.
STATE: QLD
No state solar rebate but Battery Booster offers up to $4,000 for batteries in regional QLD.
What Size Solar System for Cairns?
A quick rule: divide your quarterly electricity bill by $100 to get your ideal system size in kW. The most popular system size in Cairns is 6.6kW, which suits the average household using 15–25 kWh per day.
Not sure which size is right? Our system sizes comparison guide breaks down the pros and cons of each option with detailed cost and savings projections. For a personalised recommendation based on your actual bill, try our free solar score calculator.
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Get My Solar Score ☀Is Solar Worth It in Cairns?
In short, yes. Solar energy in Cairns is one of the best home investments available. With electricity rates at 30c/kWh and an average quarterly bill of $463, the average Cairns household spends roughly $1,850/year on power. A 6.6kW solar system costing $4,200–$6,800 typically saves $1,600–$2,100 in the first year alone.
3–5 yrs
PAYBACK PERIOD
$425,057,500+
25-YEAR SAVINGS
41%+
ANNUAL RETURN
With electricity prices rising 4–6% annually across QLD, these savings increase every year. A $6,000 solar panel installation in Cairns that saves $1,800/year represents a 30%+ annual return — comfortably outperforming term deposits, shares, and most investment properties. Plus, solar panels add 3–4% to your property value according to Australian research, making it a strong financial decision even if you plan to sell.
Cairns Feed-in Tariffs
The current feed-in tariff in QLD is approximately 5.0c/kWh for excess solar exported to the grid. This rate is applied to any surplus electricity your panels generate beyond what your home uses in real-time.
At current rates, a 6.6kW system in Cairns exporting around 60–70% of generation would earn approximately $423/year in feed-in credits. The real savings come from self-consumption — every kWh you use directly saves 32c versus the 5.0c you'd earn exporting it.
Best Solar Panels for Cairns
The best solar panels for Cairns depend on your budget, roof space, and priorities. With 5.4 peak sun hours, Cairns gets excellent irradiance — even mid-range panels perform well here.
Premium
SunPower, REC, LG
Highest efficiency (22%+), 25yr warranty
Mid-Range
Trina, Jinko, Canadian
Best value per watt, strong 15-25yr warranty
Budget
Risen, Longi, JA Solar
Lowest cost, 10-12yr warranty, CEC approved
All panels installed in Cairns should be CEC-approved (Clean Energy Council) to qualify for STC rebates. For a full comparison of panel brands, efficiency ratings, and warranty details, see our best solar panels Australia 2026 guide. Your inverter choice is equally important — our inverter guide covers string, micro, and hybrid options.
Choosing a Solar Installer in Cairns
Finding a reputable solar installer in Cairns (postcodes 4868–4881) is critical to getting a quality solar panel installation that lasts 25+ years. With a population of 160K, Cairns has a competitive local installer market — but quality varies significantly.
We recommend getting at least 3 quotes before committing. Our free solar score tool can connect you with up to 3 CEC-accredited, vetted solar installers in Cairns — saving you the time of researching and calling around. Every installer in our network has been verified for quality, local experience, and customer satisfaction.
Related Guides
Frequently Asked Questions
How much do solar panels cost in Cairns?
A standard 6.6kW solar system in Cairns costs approximately $4,200–$6,800 after federal STC rebates. Prices vary depending on panel brand, inverter choice, and installer. Premium systems and larger 10kW+ installations will cost more. Get your free solar score above for a personalised estimate.
How many peak sun hours does Cairns get?
Cairns receives approximately 5.4 peak sun hours per day on average. This is factored into our solar score calculator to give you an accurate estimate of how much electricity a solar system will generate on your roof.
What rebates are available for solar in Cairns?
Homeowners in Cairns, QLD are eligible for federal Small-scale Technology Certificates (STCs) which reduce upfront costs by $2,000–$4,000 depending on system size. Additional state-level incentives may also apply — use our calculator above for a full rebate breakdown.
Is solar worth it in Cairns?
Yes. With 5.4 peak sun hours daily and electricity rates around 32c/kWh, most Cairns homeowners see a payback period of 3–5 years. After that, the savings are pure profit for the remaining 20+ years of the system's life.
How do I find a good solar installer in Cairns?
Use our free solar score tool to get a personalised analysis, then optionally connect with up to 3 CEC-accredited, vetted installers in the Cairns area. We only partner with installers who have verified reviews and at least 2 years of local experience.
What are the best solar panels for Cairns?
For Cairns's conditions, premium brands like SunPower and REC offer the highest efficiency, while Trina and Jinko provide excellent value. All panels must be CEC-approved to qualify for STCs. The best choice depends on your roof space, budget, and whether you prioritise maximum output or value per watt.
How long does solar panel installation take in Cairns?
A standard residential solar panel installation in Cairns takes 1 day for panels and inverter. Larger systems or battery additions may take 1.5-2 days. The full process from quote to switch-on, including grid connection approval, typically takes 2-6 weeks in QLD.
Will solar panels increase my Cairns property value?
Yes. Australian research shows solar homes sell for 3-4% more on average. In Cairns, a 6.6kW system costing $4,200–$6,800 could add $15,000-$30,000 in property value, making it a strong investment even if you plan to sell within a few years.