SOLAR PANEL
15KW
Best For Larger Homes
$8,799*
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15kW Solar System
A 15kW solar system is a high generating solar (PV) solution for large households and sizable electrical use homes. It is perfect for big households, medium sized business or farms, or any energy intensive operation looking to save on energy costs and reduce carbon emissions.
Receiving some of the highest sunlight-harvesting in the world, by installing a 15KW solar system property owners can take advantage of every square metre of roof and drastically cut their grid consumption. As the Australian Government Bureau of Meteorology states, the vast majority of Australia enjoys 4.5 to 6.5 peak sun hours a day and therefore, solar is an intelligent investment for all Aussies!
Discover The Best Solar Panel System For Your Home And Business
10KW
Solar System
Just right for most family homes
$
5,999
*
Small Home
- Tier 1 Solar Module
- 5kW Power Inverter
- 6,600w Tier 1 Panels
- High Efficiency Solar Module
13KW
Solar System
Medium homes and small business
$
7,599
*
Medium Home
- Tier 1 Solar Module
- 8kW Power Inverter
- 10,300w Tier 1 Panels
- High Efficiency Solar Module
15KW
Solar System
Larger homes and small businesses
$
8,799
*
Big Family Home
- Tier 1 Solar Module
- 10kW Power Inverter
- 13,200w Tier 1 Panels
- High Efficiency Solar Module
30KW
Solar System
small offices and retail stores
$
12,599
*
Big Family Home
- Tier 1 Solar Module
- 30kW Power Inverter
- 30,000w Tier 1 Panels
- High Efficiency Solar Module
40KW
Solar System
Best for large shops and clinics
$
16,599
*
Medium Industrial
- Tier 1 Solar Module
- 40kW Power Inverter
- 40,000w Tier 1 Panels
- High Efficiency Solar Module
50KW
Solar System
warehouses and mid-size business
$
19,599
*
Huge Commercial
- Tier 1 Solar Module
- 50kW Power Inverter
- 50,000w Tier 1 Panels
- High Efficiency Solar Module
*Performance data is based on CEC guidelines and may differ depending on your location. For personalized advice on your solar requirements and potential savings, please consult with an Aussie Solar Installation expert.
Why Should You Choose a 15kW Solar System in Australia?
Installing a 15kW solar system offers both financial and environmental advantages:
- Produces clean, high-quality electricity every day
- Substantially lowers power bills
- Shields against increased electricity prices
- Assists Australia towards its renewable energy goals
- Reduces carbon footprint
- Adds long-term property value
Rooftop solar accounts for more than 5 millions(approx.) arrays installed there, according to the Clean Energy Council (CEC), and powers over a quarter of electricity at peak times in some parts of the country.
Average Output of a 15 kW Solar System in Australia
A 15kW solar system can produce a significant amount of electricity per day in Australia, on average, depending on the region and weather. This can easily meet a large portion of the daily electricity needs of a large household or commercial establishment.Though, fluctuates depending on:
- Location
- Roof orientation
- Tilt angle
- Shading
- Seasonal sunlight
The power output of a 15 kW solar system varies across Australian cities due to the amount of sunlight and seasonal weather conditions. Output is higher in summer and lower in winter. The table below shows the average daily output and annual potential power output of a 15 kW solar system in some major Australian cities.
City | Avg Daily Output | Annual Production |
Brisbane | 60–62 kWh/day | ~22,000 kWh/year |
Sydney | 52–56 kWh/day | ~19,700 kWh/year |
Melbourne | 47–52 kWh/day | ~18,300 kWh/year |
Adelaide | 58–61 kWh/day | ~21,500 kWh/year |
Perth | 60–65 kWh/day | ~23,000 kWh/year |
Darwin | 62–68 kWh/day | ~24,000 kWh/year |
15kW Solar System Specifications
A 15kW solar system is suitable for large homes and commercial buildings with high electricity consumption. It ensures robust power generation, as well as helps reduce electricity bills in the long run and reduces grid dependency. If necessary and available, additional power can be stored by connecting batteries. Below are the general technical specifications of a typical 15 kW solar system.
Feature | Typical Value |
System Capacity | 15kW (DC) |
Number of Panels | 34-46 panels(depends on panel weight) |
Panel Rating | 330W – 450W per panel |
Roof Space Required | Approx. 70–90 m² |
Inverter Size | 10–15 kW inverter |
Connection Type | Grid-connected (battery:If it is possible to buy) |
Suitable Property Type | Large homes & commercial buildings |
15kW Solar System Price in Australia
The total price can vary depending on the solar panel brand, inverter quality, and whether a battery system is included.
System Cost
Starting from around A$8,799 for a standard system (solar panels + inverter, no additional upgrades)
Premium systems using high-end panels and inverters can range between A$10,000 and A$12,000 or more
Cost per watt: Approximately A$0.60 – A$1.00 per watt
Installation Cost
Installation typically costs between A$1,000 and A$3,000, depending on factors such as:
Roof type and overall installation complexity
Location of the property (rural or remote installations may cost more)
Whether switchboard upgrades or electrical modifications are required
For the best price and expert advice, get in touch with us at Aussie Solar Tech.
ROI & Payback – Thoughts On Return on Investment
The savings from investing in a 15 kW solar system depend on the price of electricity, your own usage rate, and the location of the system. Typically, the investment pays for itself very quickly and ensures significant energy savings over the long term.
Savings depend on:
- Electricity tariff
- Self-consumption rate
- Export feed-in tariff
- System orientation
Typical savings:
- Annual savings: $3,800 to $5,500
- Payback Period: 3.5 – 6.5 years
- System lifespan: 25–30 years
A 15 kW system will put out over 25 years:$90,000+ in electricity savings.
How Much Roof Space Does a 15 kW Solar System Need?
A 15 kW solar system typically requires about 70 to 90 square meters of roof space. This space depends on the wattage of the panels being used; typically 34 to 46 panels are installed. The arrangement of the panels can also vary depending on the shape, pitch, and orientation of the roof. Additional space may be required if there are trees, chimneys, or neighboring buildings that cast shadows. North-facing, open roofs are generally considered best for maximum production. Therefore, it is very important to inspect the actual condition of the roof before installation.
What Installers Will Check Prior to Installing
Roof direction: Most installations in Australia recommend a north-facing roof to get the best performance year-round, though east–west orientations can still perform well with the right design.
Shade impact: Trees, nearby buildings, antennas or roof objects can block solar power production and should be taken into account carefully.
Roof angle: The pitch of your roof determines how effectively panels collect sunlight over the course of a day and throughout seasons.
Roof health: If your roof is in bad shape or nearing the end of its useful life, it could require repair or reinforcement before solar panels can be installed.
These are some of the factors experienced solar installers will consider when they conduct a site assessment, frequently using satellite technology, shade analyzers and 3D measurements of your roof to create an efficient panel layout and design before giving you a final quote.
Environmental Impact
As per Australian Government Department of Climate Change and Energy Efficiency:
- Approx. 0.7–0.9 kg CO₂ are generated by 1 kWh of grid electricity
- A typical 15 kW system (producing 22,000kWh/year); reduces about and half million of these are at a price such that around 750,000 will be installed.
- Avoids 15–19 tonnes of CO₂ annually
Equivalent to:
- 700+ trees planted annually
- Environment eliminating 4-5 Gasoline car from the road
Battery Storage Compatibility
The 15 kW solar system is compatible with battery storage, which helps store excess electricity generated. Using batteries makes it easier to meet your own needs and reduces your dependence on the grid.
Common battery sizes:
Battery benefits:
- Store excess solar
- Use power at night
- Reduce peak grid use
- Improve blackout protection
Typical battery cost:
$9,000 – $15,000 installed
Explore more popular solar energy storage options to find the best solution for your home or business.
Who should install a 15kW Solar System?
A 15 kW solar system is suitable for large households or commercial establishments with high electricity consumption. It is an excellent investment for those who want to reduce their electricity costs in the long term and reduce their dependence on the grid. In addition, this system can be easily installed on properties with large roofs and sufficient space.
Best suited for:
- Homes using 40+ kWh/day
- Commercial buildings
- Agricultural properties
- EV owners
- Businesses operating during daylight
May not suit:
- Small households
- Shaded or small roofs
- Low daytime consumption
Why Choose Aussie Solar Tech?
At Aussie Solar Tech we offer:
- Tier-1 solar panels
- Clean Energy Council-approved inverters
- Custom system design
- Professional Australian installation
- Full rebate assistance
- Ongoing customer support
We engineer all systems for high output, life expectancy and financial yield. Call us now to get free solar evaluation and find out how much you can save with solar.
Frequently Asked Questions
What is the power production capacity of a 15 kW solar system in one day?
An Australian 15kW solar system produces somewhere between 45 kilowatt-hours (kWh) and 65 kWh of electricity per day, based on location, roof direction and angle, shadows cast by trees, neighbouring buildings etc. and what time of year it is. In the sunnier areas Queensland, Western Australia and the Northern Territory for every day production of 60kWh is achieved, where as you will be looking slightly lower in the southern states.
Is a 15kw solar power system good for homes?
Yes, you can get 15kw solar system on residential house as long as you have enough roof space ( say between 70 -90square meters ) and high electricity consumption. It’s ideal for larger households, homes with electric cars, pools or ducted air conditioning or have a number of high-energy consuming appliances.
How long does it take to recoup the investment in a 15kW solar system?
A 15kW solar system payback period in Australia due to electricity consumption, self-consumption, feed-in tariff, and local electricity cost is usually between 3.5-6.5 years – with some variations for different regions and locations in Australia. The power produced after this time is essentially free. And your system keeps on generating for 25 years or more!
Can I get battery storage in future with a 15 kW solar system?
Yes, 15kW solar systems are generally ready to be made “battery-ready”. And you can add battery storage later to keep your excess solar energy for use at night or during blackouts. Typical battery sizes for 15 kW systems are between 10kWh to 20 kWh depending on the amount of energy used and whether there is any backup benefits required.
Will a 15kW solar system be enough to wipe out my electricity bill?
A 15kW solar system will dramatically lower your bills, and in some cases even cut them out entirely for high-generating months. But actually zeroing your bill will depend on factors like how much power you use at night and during cloudy periods, feed-in tariff rates and if you have a battery system. Most users have a small grid connection fee, which they continue to do.
Why Choose Aussie Solar Installation For Solar Panels?
Reduced Electricity Bills
Prices for electricity in Australia keep going up. With a combination of a commercial solar system and your business, you can make your own power, which will save you a lot of money on your monthly bills. Many of our customers say they save up to 70% on their monthly utility costs.
Premium Products, Guaranteed Performance
We install top-tier solar panels, inverters, and battery systems from leading global brands. Our products are built to withstand Australian weather and deliver long-lasting performance, backed by comprehensive warranties.
Brand Image and Sustainability
Going solar not only saves you money, but it also makes your brand look better when it addresses the environment. Customers, along with additional stakeholders like businesses that want to use less energy and migrate to clean energy.
Energy Independence & Stability
Solar energy makes you less reliant on the grid, which protects your business from unexpected blackouts and rate hikes, making sure that everything runs smoothly all the time.
Expert Local Installers
We are Standards Australia Approvals (SAA)-certified, and in-house installation teams work across New South Wales. With years of local experience, we handle everything—from permits and grid connections to final inspection—with professionalism and care
Unmatched 24/7 Support
As a comprehensive solar provider, we offer continuous help, support, and maintenance throughout the entire lifespan of your system.
What's We Included In Your Solar Panel Installation?
Free Site Assessment And Energy Analysis
Custom System Design And Proposal
Supply Of High-Efficiency Solar Panels And Inverter
Professional Installation By SAA-Accredited Electricians
Assistance With Rebates And Incentive Claims
System Monitoring Setup And Customer Training
Industry-Leading Warranties
Ongoing Technical Support And Maintenance Options
We Install CEC Approved Popular Solar Panels In Australia
- SunPower Solar Panel
Known for being very efficient and lasting a long time, making it perfect for both homes and businesses.
- Trina Solar Panel
Known for being reliable and providing high energy output at a low cost.
- REC Solar Panel
Delivers robust performance and an excellent warranty, making it a trusted choice for residential and commercial applications.
- Longi Solar Panel
Famous for its modern monocrystalline technology, which makes this very efficient as well as having good significance.
- AIKO Solar Panel
Provides dependable performance with a lot of energy output, focusing on solutions that are both cost-effective and eco-friendly.
- Jinko Solar Panel
Provides reliable performance with a lot of energy output, focusing on solutions that are both cost-effective and eco-friendly.
- Canadian Solar Panel
Known for producing durable, high-performance solar panels suitable for various climates and applications.
- Q CELLS Solar Panel
This panel has cutting-edge technology that makes it very efficient and effective, so it can be used in homes and businesses.
