SOLAR PANEL
40KW
Best For large shops and clinics
$16,599*
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40kW Solar System
If you’re running a medium to large business in Australia, switching to solar isn’t just a smart move — it’s almost becoming a no-brainer. And if you’re eyeing something like a 40KW solar system, you’re probably serious about cutting your electricity costs and reducing grid dependency.
This system size fits nicely in that “just big enough” sweet spot. It’s not a massive solar farm, but it’s definitely commercial-scale. Let’s walk through the key things you need to know before deciding if this is the right system for your business or property.
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
20KW
Solar System
Larger homes and small businesses
$
10,299
*
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.
Who Actually Needs a 40KW Solar System?
That depends entirely on your energy usage.A 40KW system isn’t small — it’s typically used by:
Small factories
Medium-sized offices
Large retail stores
Agricultural operations (like irrigation or processing units)
If your average daily usage is around 100–160 kWh, this system might suit you perfectly. Many Aussie businesses in hospitality, manufacturing, or retail hit that range easily. But if your usage is much lower — say under 60 kWh per day — you might be better off with something like a 20KW or even a 13KW system.Still, a lot of Aussie business owners choose to go bigger upfront, especially if they’re planning to expand or want to future-proof their setup.
How Much Energy Can a 40KW System Generate?
A 40KW solar system packs quite a punch when it comes to energy output. On average, in full sun, it can generate anywhere between 140 to 180 kWh per day depending on where you are in Australia. Of course, this depends on a few key things — like how much sun your site gets, the orientation of your roof, and how efficient your solar setup is. But even with some variation, this size system offers enough juice to easily run most mid-sized businesses, workshops, or community buildings.
Here’s a rough estimate based on different Aussie cities:
| City | Estimated Daily Output |
|---|---|
| Brisbane | Up to 180 kWh/day |
| Sydney | Around 160 kWh/day |
| Melbourne | 140–150 kWh/day |
| Perth | Over 170 kWh/day |
| Darwin | Over 170 kWh/day |
Who Actually Needs a 40KW Solar System?
That depends entirely on your energy usage.A 40KW system isn’t small — it’s typically used by:
Small factories
Medium-sized offices
Large retail stores
Agricultural operations (like irrigation or processing units)
If your average daily usage is around 100–160 kWh, this system might suit you perfectly. Many Aussie businesses in hospitality, manufacturing, or retail hit that range easily. But if your usage is much lower — say under 60 kWh per day — you might be better off with something like a 20KW or even a 13KW system.Still, a lot of Aussie business owners choose to go bigger upfront, especially if they’re planning to expand or want to future-proof their setup.
What’s the Cost of a 40KW Solar System in 2025?
So, what’s it gonna cost you in 2025? For a decent-quality 40KW solar system, prices start from around A$16,599 (after STC rebate). However, the total price can vary slightly depending on your city — sunshine levels, demand, and local installer rates all play a role. So Brisbane might be a bit cheaper than Melbourne, for example.
Installation Costs & What’s Included
Installation usually costs between A$1,000 to A$3,000, depending on your roof type and how complex the setup is. Steep, multi-level, or tiled roofs usually cost more to work with. Before you lock anything in, make sure your installer is CEC-approved. This protects your investment and ensures you’re eligible for available rebates.
Payback Period & Realistic Savings Expectations
With a system this size, you’re probably wondering: when will it pay for itself? On average, Aussie businesses can expect a payback period of 3 to 5 years for a 40KW system — sometimes even faster if you’re offsetting expensive daytime electricity rates.Typical savings range from A$8,000 to A$13,000 per year, depending on:
Your daily energy use
Feed-in tariffs in your state
How much power you use during the day (vs exporting)
Whether you shift usage to solar hours
One pro tip: try to align your business operations (machinery, cooling, lighting) with peak solar generation hours. It makes a noticeable difference.
How Much Roof Space Will You Need?
Let’s get practical — solar needs space. A 40KW solar system usually needs around 190 to 250 square metres of unshaded roof area, assuming you’re using standard 440W to 550W panels (which are pretty common in 2025). The total number of panels will depend on the wattage — for example, about 80 panels if you go with 500W ones, or closer to 90–95 for 440W. Installers typically assess your roof based on direction, pitch, and shading. North-facing roofs still offer the best output in Australia, while too much shade or the wrong angle can reduce efficiency. If space is a bit tight, high-efficiency panels are a good option, though they might cost a little more upfront
Government Rebates and Solar Incentives
40KW solar system in Australia is eligible for STC (Small-scale Technology Certificate) rebates, which can reduce your upfront cost significantly — often around A$14,880 depending on your location and system size. The number of STCs is calculated based on how much renewable energy your system is expected to generate over time. These incentives vary slightly from state to state. Some local councils and state governments may also offer additional rebates, interest-free loans, or feed-in tariff programs. To access these benefits, your system must be installed by a CEC-accredited installer and use approved panels and inverters.
Things Aussies wish they knew before installing solar
Many Aussie homeowners jump into solar thinking it’s a simple install-and-save deal — but there are a few things they often realise too late. For starters, not all panels and inverters are created equal. Choosing cheap, unproven brands can lead to poor performance or even early failure. Some also underestimate how crucial proper installation is — a rushed or careless install can cause long-term problems or void your warranty. And while solar can cut your power bill significantly, savings vary depending on system size, usage habits, and tariffs. Lastly, many regret not planning ahead for battery or EV charger compatibility.
At Aussie Solar Tech, we’re a CEC-accredited solar retailer and installer — meaning you’re not just getting quality products, but certified expertise from day one.
Why Choose Able 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.