Reviewed by Saba Arif
Final solar panel prices can vary depending on several key factors, including system size (kW), panel brand and inverter quality as well as complexity of installation.
Government rebates & incentives continue to play a major role in lowering costs, with an average saving of about 30%.
Cost of solar panels by state
| 5kW | 6kW | 8kW | 10kW | |
|---|---|---|---|---|
| Sydney NSW | $5,692 | $6,678 | $8,254 | $9,718 |
| Melbourne VIC | $5,892 | $6,918 | $8,573 | $10,117 |
| Brisbane QLD | $5,692 | $6,678 | $8,254 | $9,718 |
| Adelaide SA | $5,692 | $6,678 | $8,254 | $9,718 |
| Perth WA | $5,692 | $6,678 | $8,254 | $9,718 |
| Hobart TAS | $5,892 | $6,918 | $8,573 | $10,117 |
| Darwin NT | $5,453 | $6,399 | $7,895 | $9,239 |
| Canberra ACT | $5,692 | $6,678 | $8,254 | $9,718 |
| Cairns QLD | $5,453 | $6,399 | $7,895 | $9,239 |
| National Average | $5,683 | $6,669 | $8,245 | $9,700 |
Solar System Cost Calculator
This solar power calculator is not a quote, it's to give you an idea of price. You will need to get quotes from local installers to know the true price you will be paying.
Factors that affect the cost of solar panels
Solar panel prices in Australia aren’t one-size-fits-all. The final cost of a system will depend on several major factors outlined below.
System size (kWh) and overall system cost
The bigger the system, the more panels, inverters, and labour are required. Costs usually hover around $1,000 per kW fully installed, but larger systems often come with a lower overall cost per kW thanks to bulk pricing.
For example, a 3kW system may seem cheap overall, but on a per-kilowatt basis, a 10kW setup can offer better value. Over-sizing your system has multiple benefits worth exploring.
Panel quality (budget vs premium)
| Category | What You're Getting | Worth Considering? |
|---|---|---|
| Garbage Solar | Rock-bottom price, cheap panels, rushed job. Warranty? Good luck. | ❌ No way |
| Budget but OK | Basic but decent gear. Quick install, little follow-up service. Fine for simple homes. | ✅ On tight budgets |
| Happy Medium | Good balance of cost, quality gear, and service. Proper site visit, shading check, trusted brands. | ✅ Best all-rounder |
| Solar Craftsmen | Top-tier gear and flawless installs. Neat work, full support. Great for tricky jobs. | ✅ If you want the best |
| Pricey Pretenders | Pushy sales, inflated price tags, average gear dressed up as “premium.” | ❌ Avoid |
Not all panels are made equal and the big question is do you go for a budget or premium solar system?
The average solar panel cost depends on efficiency and warranty. Budget panels from brands like Jinko and Trina are reliable and affordable, making them popular for households chasing the quickest return on your investment.
Premium solar panels from SunPower, REC, Panasonic or LG cost more, but deliver higher efficiency, better longevity, and longer warranties. Choosing between the two is often a balance between the cost of solar vs long-term performance.
Get Prices: Want to skip the hard part and just solar quotes from trusted local solar installers? 1 Form, 2 Minutes, 3 Quotes – Fast, Easy & Free.
Inverter type & warranty
The inverter is the heart of your entire system cost — converting solar energy into usable electricity. Costs vary depending on whether you choose a string inverter, microinverter, or hybrid model. Reputable brands often come with warranty periods of 25 years and advanced monitoring options. Choosing a Clean Energy Council (CEC)–approved inverter ensures both compliance for warranty claims.
Ease of solar installation and labour
A straightforward solar installation on a single-story home with a north-facing roof will cost less than a complex setup involving tile roofs, double stories, cabling upgrades, or tricky shading issues. Extra work like switchboard upgrades or labour-intensive installs can quickly add thousands to the total cost.
Budget vs Premium Solar Panels
Not all solar panels are built the same. Budget panels from brands like Jinko and Trina are reliable, affordable, and deliver quick ROI for households chasing the lowest prices. On the other hand, premium panels like Sunpower, REC, Panasonic or LG come with higher efficiency, longer warranties, and slower degradation. Choosing between budget and the best quality panels available means weighing short-term savings against long-term value.
In 2025, budget panels in Australia typically cost (budget and premium panels comparison) around $300–$380 per kW, while premium panels can range from $600–$750+ per kW.
How much does solar installation cost?
The cost of installing a solar panel system is factored into the sale price of the solar system. For example, if a company advertises a 6.6kW solar panel system’s price as $6,310, this price includes installation after the solar panel rebate.
Installation costs in Australia cover several key items:
Panels – The solar panels represent the largest cost when installing a system.
Inverter – Depending on the type of inverter needed, the can add quite a bit to cost. If your roof is partly shaded, micro inverters will be needed over a cheaper string inverter.
Labour/ wiring – SAA-accredited installers, usually a team of 2–3, handle the panel mounting, wiring, and safety checks.
Mounting hardware – Rails, clamps, and brackets that secure panels to your roof (tile, tin, or terracotta can change costs).
Solar panel cost per watt
The average solar panel cost per Watt in Australia ranges from $0.89 to $1.45.
A 10kW solar system costs about $1.00 per watt with mid range equipment.
When you buy larger systems, the price per Watt comes down. Kind of like “buy in bulk and save.”
The reason is that the labour cost to install a larger system is about the same as installing a smaller one, so you are just really paying extra for the panels.
Solar panel prices by home size
We have created this table to quickly and easily show you the solar PV system prices for an average home size. We have included the system’s size, the required roof size, the number of people per home this system can support, and the saving per year you will enjoy off your power bill.
Cost of Solar for a 3-Bedroom Home
The cost of solar for a 3 bedroom house depends on daily energy use, but most households of this size install a 5 – 6.6kW solar system.
- Typical cost: $6,100–$7,400
- Light use (couple only): ~5-kilowatt system.
- Higher use (family, pool, kids at home): ~6-kilowatt system.
This 6KW system generates the 24–28 kWh/day that an average 3-bedroom home consumes, making it the sweet spot for both savings and return on investment.
| Suits homesize | System size | No. of panels | No. of People | Average yearly saving |
|---|---|---|---|---|
| Small | 1.5KW | 4 | 1 - 2 | $690 |
| Small - Med | 2KW | 5 | 1 - 2 | $986 |
| Medium | 5KW | 11 | 2 - 3 | $2,364 |
| Med - Large | 6kW | 14 | 2 - 3 | $2,981 |
| Large | 7KW | 16 | 3 - 5 | $3,565 |
| X Large | 10KW | 22 | 5 - 6 | $4,722 |
| XX Large | 15KW | 34 | 6 - 8 | $7,150 |
| Space Station | 20kW | 44 | 8 - 10 | $9,230 |
👉Pro Tip: For a full breakdown of what to look for when buying solar – see our Buying Solar 101 Guide →.
ROI and long-term value
One of the most common questions homeowners ask is, “How long will it take for my solar system to pay for itself?” The answer depends on your system size, cost, feed-in tariff, and local power prices.
What is payback?
This refers to the period of time a solar system takes to recoup it’s initial investment. After that point, the electricity your panels generate is essentially free (aside from occasional maintenance).
Typical ROI in Australia (average cost recovery)
In 2025, most solar systems in Australia deliver a return on investment of around 4–7 years. Smaller systems may recover costs faster if the cost is low, while larger systems often have slightly longer timelines but deliver better long-term returns.
Average ROI Periods (Australia, 2025):
| System size | ROI Panels Only | ROI with Battery | Notes |
|---|---|---|---|
| 3 kW | 3–4 years | 7–9 years | Low upfront cost; battery often oversizes system. |
| 6.6 kW | 3–4 years | 8–10 years | Most common Aussie system; battery doubles upfront cost. |
| 10 kW | 4–5 years | 10–12 years | Longer ROI but strong lifetime ROI. |
ROI, longevity and efficiency
Beyond just recouping your initial investment, it’s worth looking at the bigger picture — how much value your system generates over its lifetime. Solar isn’t just about breaking even; it’s about long-term returns, durability, and how efficiently your panels perform year after year.
Beyond energy savings and return on investment, solar can also influence property value. Our analysis of Australian home sales shows how solar panels can increase home value across different cities.
- ROI (Return on Investment): Most households see a lifetime ROI of 200%–300% over 15-20 years.
- Longevity: Modern solar panels last 25+ years, with warranties backing their performance.
- Efficiency: Premium panels (SunPower, LG) degrade slower, keeping higher outputs for longer, while budget brands may lose efficiency faster.
How much will I save each year?
Below is a table that outlines the yearly saving per system size, as well as the life time saving for the same system.
Savings are based on an electricity price point of 3.09c/kWh from the report Residential Electricity Price Trends 2021 by the Australian Energy Market Commission (AEMC).
| System size | No. of panels | Average yearly saving | Lifetime Saving |
|---|---|---|---|
| 2 KWh | 5 | $986 | $22,185 |
| 5 kWh | 11 | $2,364 | $33,255 |
| 6 kWh | 14 | $2,981 | $44,437 |
| 7 kWh | 16 | $3,565 | $80,212 |
| 10 kWh | 22 | $4,722 | $106,245 |
Solar Rebates, STCs and Government Incentives
One of the biggest reasons solar installation is so affordable in Australia is the federal STC scheme. Rather than a direct cash rebate, households receive Small-scale Technology Certificates (STCs), which are traded like credits. The value of these STCs is applied by your installer, reducing the system price before you even pay. This nationwide federal incentive will be phased out in 2030.
How STCs work
STCs (Small-scale Technology Certificates) are the credits that calculate your solar panel rebate used to calculate your solar panel rebate. The more kilowatts of panels you install — and the sunnier your location — the more STCs your system earns. Each certificate has a dollar value, which your installer applies directly to your quote to reduce the cost of installing solar.
👉Pro tip: You don’t really need to worry about STC’s. Installers factor your rebate into their advertised system price and handle the paperwork afterwards.
FAQ's
Yes — solar panels cut your electricity bills and can save the average Australian household about $1,400 per year. With electricity prices rising by ~2% annually, the savings grow over time. Most systems pay for themselves in 3–5 years, and after that the electricity they generate is essentially free.
Yes — a house can run entirely on solar power if it has a battery system to store excess energy for use at night or during cloudy periods. Without a battery, solar panels only cover daytime use. While batteries add cost today, they are becoming more affordable and make true energy independence possible.
Yes — feed-in tariffs are still available in all Australian states in 2025, but the rates vary by retailer and state policy. Most households can earn credits for exporting excess solar back to the grid, though rates are lower than in past years. Check our [feed-in tariff guide by state] for the latest rates in your area.
Yes — you’ll still receive electricity bills after installing solar panels, but they will usually be much lower. Your panels supply most of your daytime power, so the bill often just covers grid electricity used at night plus daily supply charges. If you add a battery and size your system well, some households reduce their bills to zero.
In Australia, most solar systems pay for themselves in about 3–4 years. The exact timeframe depends on your system size, upfront cost, local electricity rates, and how much of your solar power you use at home. After payback, the electricity your panels generate is essentially free for the rest of their 25+ year lifespan.
In 2025, solar panel prices per panel in Australia range between $300 and $750 depending on panel choice. When you calculate the system cost, you’ll pay less per panel for larger systems, and rebates like the STC rebate further decrease the total cost.
Households in Sydney and regional NSW can expect to pay around $5,000–$9,000 for a 6.6kW solar system fully installed. The cost of installation varies with cable runs, wind exposure, and roof type, but reputable solar installers provide competitive quotes.
