SOLAR PANEL
30KW
small offices and retail stores
$12,599*
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30kW Solar System
A 30kW solar system is a highly cost-effective solution for small to medium-sized businesses in Australia. In 2026 it costs $12,599 fully installed after federal STC rebates. With daily output of 86–136 kWh depending on location, a 30kW solar system installation delivers payback periods as short as 1.3 years in Adelaide and 1.9 years in Sydney.
This guide covers everything Australian business owners need to know: 30kW solar system price breakdowns by city, full installation cost components, payback calculations, panel and roof requirements, and battery storage options.
$12,599
Installed price (after STC rebate)
86–136
2–5 yrs
$200k+
What Is a 30kW Solar System?
A 30kW solar system is a small-to-medium commercial solar installation that sits comfortably in the sweet spot between large residential and full-scale industrial solar. At this capacity, the system generates enough electricity — 86 to 136 kWh per day depending on location — to power most small-to-medium Australian businesses entirely during daylight hours.
At Aussie Solar Tech, a fully installed 30kW commercial system includes 60–80 Tier 1 solar panels, a commercial-grade three-phase inverter (or multiple inverters), roof-mount hardware for commercial roofing, smart commercial monitoring, grid protection equipment, and a full DNSP connection managed by our CEC-accredited team. All systems comply with AS/NZS 5033, AS 4777, and relevant state DNSP standards.
ℹ️ Why 30kW is the commercial sweet spot?
30kW sits just below the point where systems move from the simpler STC rebate scheme to the LGC (Large-scale Generation Certificate) scheme at 100kW. That means you get generous upfront rebates, simpler paperwork, and faster approval timelines compared to larger commercial systems.
Who Needs a 30kW System? Business Types & Use Cases
A 30kW system is appropriate for any premises with consistent, high daytime energy consumption — typically 80–150 kWh per day. The higher your daytime usage, the faster your payback. Below are the most common business types we install 30kW systems for across Australia.
- Retail Stores & Supermarketsc: Lighting, refrigeration, HVAC, and POS systems running 8–10 hrs/day make retail one of the best fits for 30kW solar.
- Schools & Childcare Centres: Peak usage during school hours aligns perfectly with peak solar generation — self-consumption rates of 80%+ are common.
⚠️ 30kW may be oversized for typical homes
Most Australian households (20–40 kWh/day) are better served by a 10kW or 20kW system. A 30kW system only delivers strong financial returns when you consume the majority of its output during the day. Our team will model your exact usage before recommending a system size.
Discover The Best Solar Panel System For Your Home And Business
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
10KW
Solar System
Just right for most family homes
$
5,999
*
Small Home
- Tier 1 Solar Module
- 5kW Power Inverter
- 10,300w 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
- 13,200w 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
- 20,000w 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.
Panels & Roof Space Required For 30kW Solar System
The number of panels, inverter configuration, and roof space for a 30kW system depends on the panel wattage selected and your roof type. Commercial roofs — flat concrete, corrugated iron, Colorbond — have different mounting requirements that affect both cost and layout.
Panel Count & Roof Area
| Panel Wattage | Panels Required | Approx. Roof Area | Typical Use Case |
|---|---|---|---|
| 380W | 79 panels | ~135 m² | Standard efficiency |
| 400W | 75 panels | ~128 m² | Most common choice |
| 420W | 72 panels | ~122 m² | High efficiency, recommended |
| 450W | 67 panels | ~114 m² | Premium / space-limited roofs |
| 500W+ | 60 panels | ~102 m² | Ultra-high efficiency / bifacial |
*Roof area estimates include 300mm panel clearances, perimeter setbacks, and access pathways required by AS/NZS 5033. Flat roofs may require tilt frames, which increase spacing requirements by 20–30%.
💡Flat roof? You'll need tilt frames
Commercial flat roofs require tilt frames to angle panels north at 10°–15° for optimal output. Tilt frames add $2,000–$5,000 to the installation cost but significantly improve energy yield — typically adding 15–20% extra annual generation versus flat-mounted panels. Our commercial designers will specify the right solution for your roof.
30kW Solar System Cost in Australia
Aussie Solar Tech’s fully installed price for a 30kW commercial solar system starts from $12,599 (after the federal STC rebate). The table below compares our pricing against market averages across capital cities, providing full transparency on what a competitive installed price looks like in your city.
What's included in our $12,599 price?
Tier 1 commercial panels (CEC approved) · Premium three-phase inverter · SAA-accredited commercial installation · Commercial roof-mounting hardware · Grid protection & DNSP connection · Commercial monitoring system · STC rebate paperwork handled · Standard single-storey flat or pitched roof.
| City | Aussie Solar Tech | Market Average (Apr 2025) | Your Saving |
|---|---|---|---|
| Sydney, NSW | $12,599 | $25,100 | ~$12,501 |
| Melbourne, VIC | $12,599 | $24,340 | ~$11,741 |
| Brisbane, QLD | $12,599 | $27,850 | ~$15,251 |
| Adelaide, SA | $12,599 | $27,760 | ~$15,161 |
| Perth, WA | $12,599 | $27,020 | ~$14,421 |
| Canberra, ACT | $12,599 | $30,670 | ~$18,071 |
| Hobart, TAS | $12,599 | $28,780 | ~$16,181 |
*All prices listed are approximate and subject to change. Please request a quote for the most accurate and up-to-date pricing.
Additional Costs to Budget For
The total 30kW solar system installation cost in Australia includes more than just the panels and inverter. While Aussie Solar Tech’s base 30kW solar installation cost starts at $12,599 (fully installed after STCs), the complete installation cost for your business will depend on several site-specific factors. Below is a full breakdown of potential additional 30kW solar system installation costs to include in your budget.
| Item | Typical Cost Range | Required? |
|---|---|---|
| Switchboard upgrade | $500–$2,500 | If board is outdated |
| Tilt frames (flat roof) | $2,000–$5,000 | Flat commercial roofs |
| Long cable runs (>20m) | $500–$2,000 | Complex building layouts |
| DNSP application fee | $300–$1,200 | Some states/networks |
| Commercial monitoring upgrade | $500–$1,500 | Optional |
| Battery storage (optional) | $15,000–$40,000 | Optional add-on |
Quick Summary: 30kW Solar System Price Australia 2026
– Base installed price: $12,599 (after STC rebates)
– Market average across capital cities: $24,340–$30,670
– Your saving with Aussie Solar Tech: Up to $18,071
– Payback period: 1.3–2.7 years (business use)
– Estimated 25-year savings: $200,000+
– STC rebate value: $8,000–$12,000 (pre-applied)
Daily Energy Output by City — BOM Data
Output figures below are modelled using Bureau of Meteorology (BOM) solar irradiance data and PVWatts v8, assuming a north-facing array, 15°–20° tilt on a pitched roof, and 77% system efficiency. These are conservative annual averages — summer output will be 20–40% higher, winter 20–40% lower.
| City | Peak Sun Hours/Day | Avg Daily Output | Annual Output | Source |
|---|---|---|---|---|
| Darwin, NT | 5.5 hrs | 118–136 kWh/day | ~46,720 kWh/yr | BOM/PVWatts |
| Brisbane, QLD | 5.0 hrs | 108–122 kWh/day | ~42,340 kWh/yr | BOM/PVWatts |
| Perth, WA | 4.9 hrs | 115–131 kWh/day | ~44,890 kWh/yr | BOM/PVWatts |
| Adelaide, SA | 4.8 hrs | 109–122 kWh/day | ~42,340 kWh/yr | BOM/PVWatts |
| Sydney, NSW | 4.6 hrs | 102–113 kWh/day | ~39,420 kWh/yr | BOM/PVWatts |
| Canberra, ACT | 4.6 hrs | 108–124 kWh/day | ~42,340 kWh/yr | BOM/PVWatts |
| Melbourne, VIC | 4.2 hrs | 94–108 kWh/day | ~36,865 kWh/yr | BOM/PVWatts |
| Hobart, TAS | 3.8 hrs | 86–99 kWh/day | ~33,945 kWh/yr | BOM/PVWatts |
*Assumes north-facing pitched roof at 15°–20° tilt, 77% system efficiency, zero shading. Based on BOM solar irradiance data and PVWatts v8 modelling. Actual output will vary with panel degradation (~0.5%/yr), soiling, temperature losses, and inverter efficiency.
⚠️ Feed-in tariffs for 30kW commercial systems are limited
Most Australian DNSPs do not pay feed-in tariff credits for energy exported to the grid by commercial systems above 10kW. This means any solar energy your business cannot consume directly is essentially wasted financially. Maximising self-consumption — or adding battery storage — is critical to achieving the best ROI at this system size.
Payback Period & ROI by City
The payback table below models returns for a small business consuming 120 kWh per day (typical for a retail store or small office), at two self-consumption scenarios — 70% (good) and 90% (excellent daytime usage). Commercial electricity rates are used. All figures assume Aussie Solar Tech’s installed price of $12,599.
| City | System Cost | Elec. Rate | Self-Consumption | Annual Savings | Payback (Pre-tax) |
|---|---|---|---|---|---|
| Sydney | $12,599 | 28c/kWh | 70% | $7,310 | 1.9 yrs |
| Sydney | $12,599 | 28c/kWh | 90% | $9,400 | 1.5 yrs |
| Brisbane | $12,599 | 25c/kWh | 70% | $6,527 | 2.1 yrs |
| Brisbane | $12,599 | 25c/kWh | 90% | $8,395 | 1.6 yrs |
| Melbourne | $12,599 | 22c/kWh | 70% | $5,189 | 2.7 yrs |
| Melbourne | $12,599 | 22c/kWh | 90% | $6,672 | 2.0 yrs |
| Adelaide | $12,599 | 34c/kWh | 70% | $8,102 | 1.7 yrs |
| Adelaide | $12,599 | 34c/kWh | 90% | $10,417 | 1.3 yrs |
| Perth | $12,599 | 30c/kWh | 70% | $7,636 | 1.8 yrs |
| Perth | $12,599 | 30c/kWh | 90% | $9,817 | 1.4 yrs |
| Canberra | $12,599 | 28c/kWh | 70% | $7,456 | 1.9 yrs |
| Canberra | $12,599 | 28c/kWh | 90% | $9,585 | 1.4 yrs |
*Assumes 120 kWh/day business electricity consumption. Electricity rates based on competitive commercial market offers, April 2026. No feed-in tariff credit assumed above 10kW.
STC Rebate & Government Incentives
The federal government’s Small-scale Technology Certificate (STC) scheme applies to all solar systems under 100kW, including 30kW commercial installations. The STC value for a 30kW system is substantial — typically $8,000–$12,000 depending on your location zone and current STC spot price.
All Aussie Solar Tech prices have the STC rebate pre-applied — the $12,599 you see is what you pay after the rebate is deducted. We handle all STC paperwork at no additional charge.
Battery Storage for Commercial 30kW Systems
For most businesses, a 20kWh–40kWh battery paired with a 30kW solar system delivers the strongest combined ROI — capturing peak-rate evening savings without the cost of full overnight coverage.
| Battery Size | Coverage | Best For | Approx. Additional Cost |
|---|---|---|---|
| 20kWh | ~2–3 hrs evening coverage | Businesses closing at 6–7pm | $15,000–$22,000 |
| 40kWh | ~4–6 hrs evening coverage | Hospitality, extended hours | $28,000–$38,000 |
| 60kWh | Full overnight coverage | 24/7 operations, overnight security | $40,000–$55,000 |
| 100kWh+ | Full off-grid capability | Critical infrastructure, remote sites | $65,000+ |
See our 60kWh battery storage guide and 100kWh battery storage guide for detailed commercial pricing.
🔋Battery rebates available — act before May 2026
The Australian government’s battery incentive scheme reduces on 1 May 2026. Businesses adding commercial battery storage before this date can access maximum incentives. Contact us for a combined solar + battery commercial quote.
Is a 30kW Solar System Right for You?
A 30kW solar system might sound massive — and to be fair, it kind of is. But that doesn’t mean it’s overkill. More and more Australians are finding this system size practical, especially those who run home-based businesses, charge electric vehicles, or have large families with high daily power use. With multiple appliances running throughout the day, it offers the flexibility and backup they need.
This system size is also well-suited for medium commercial setups, including workshops, garages, schools, childcare centres, hospitality venues, and retail stores — offering consistent energy output and long-term savings.
Frequently Asked Questions
How much does a 30kW solar system cost in Australia?
A fully installed 30kW solar system in Australia costs between $12,599 (Aussie Solar Tech, after STC rebate) and $31,000 depending on the installer, equipment quality, and location. Market averages across capital cities range from $24,000–$31,000 (Solar Choice Commercial Price Index, April 2025). Our $12,599 price includes the federal STC rebate already deducted, professional installation, and all compliance documentation.
How much energy does a 30kW solar system produce per day?
A 30kW solar system generates approximately 86–136 kWh per day depending on your city, orientation, tilt angle, and shading. Based on BOM solar irradiance data: Darwin 118–136 kWh, Brisbane 108–122 kWh, Perth 115–131 kWh, Adelaide 109–122 kWh, Sydney 102–113 kWh, Canberra 108–124 kWh, Melbourne 94–108 kWh, and Hobart 86–99 kWh. These are annual averages — summer output is 20–40% higher.
What is the payback period for a 30kW solar system?
Pre-tax payback at Aussie Solar Tech’s $12,599 price is typically 1.3–2.7 years for businesses with 70–90% daytime self-consumption. When commercial tax incentives (Instant Asset Write-Off, depreciation) are factored in, effective payback can be under 12 months for eligible businesses. System lifespan is 25+ years, so most businesses enjoy 20+ years of largely free electricity after payback.
What inverter does a 30kW solar system need?
Yes. The federal STC (Small-scale Technology Certificate) scheme covers all solar systems up to 100kW capacity, including 30kW commercial installations. The rebate value for a 30kW system is approximately $8,000–$12,000 depending on your location zone (climate zone) and the current STC spot price. Our $12,599 advertised price already has this rebate fully deducted — you pay the post-rebate price directly.
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.
We Install CEC Approved Popular Solar Panels In Australia
We install CEC-approved solar panels from trusted brands including SunPower, REC, AIKO, Canadian Solar, Trina Solar, LONGi Solar, Jinko Solar, and JA Solar.
These brands are chosen for their performance, reliability, and suitability for Australian conditions.
