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50KW
warehouses and mid-size businesses
$19,599*
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50kW Solar System
If you’re running a business, community centre, school, or even a large rural property in Australia, chances are you’ve thought about ways to bring those electricity bills down. One of the most effective options for medium-sized power needs is installing a 50kW solar system. It’s a popular choice because it offers a serious reduction in energy costs without requiring the massive investment and space of utility-scale solar farms.
In many cases, this system size strikes the perfect balance — large enough to generate between 143 and 226 kWh of clean energy per day (depending on location), but still manageable in terms of installation requirements and grid approvals. Whether you’re looking to offset your daytime energy usage, improve your business’s sustainability credentials, or protect yourself from rising electricity prices, a 50kW solar system can deliver long-term value.
$19,599
Installed price (after STC rebate)
143–226
1.2–2.2 yrs
$325k+
What Is a 50kW Solar System?
A 50kW solar system is the largest system available under the federal STC (Small-scale Technology Certificate) rebate scheme, which covers systems up to 100kW. At 50kW, it sits at the upper end of the commercial tier — generating 143 to 226 kWh of electricity per day depending on location. That’s enough to power a medium warehouse, large supermarket, sizeable school, or aged-care facility almost entirely during operating hours.
A fully installed 50kW system from Aussie Solar Tech includes 100–132 Tier 1 solar panels, a premium commercial-grade three-phase inverter, commercial roof-mounting hardware, protection relay equipment (where required by your DNSP), smart commercial monitoring, and a full DNSP connection process managed end-to-end by our SAA-accredited installer.
ℹ️ 50kW: The last size before commercial complexity jumps significantly
Systems above 100kW transition from the STC scheme to the Large-scale Generation Certificate (LGC) scheme, bringing significantly more regulatory complexity, longer DNSP approvals, and higher engineering requirements. A 50kW system captures maximum STC rebate value while staying in the simpler, faster-approval tier. If your usage genuinely demands more than 50kW, our team can guide you through the 100kW pathway — but for most businesses, 50kW is the practical ceiling before the complexity jumps.
Already outgrowing 50kW? If your daily consumption regularly exceeds 250 kWh, our 100kW Solar System guide covers the LGC scheme transition, longer approval timelines, and what changes in pricing and engineering above the STC threshold.
50kW Commercial Solar: Ideal Business Types & Use Cases
A 50kW system is appropriate for any premises consistently consuming 150–250 kWh per day during daylight operating hours. The closer your usage aligns with peak solar output hours (10am–3pm), the faster your payback. Below are the top business types Aussie Solar Tech installs 50kW systems for across Australia.
⚠️ Export limits also vary by connection type
Single-phase commercial connections are typically capped at 5–10kW export; three-phase connections — standard for most 50kW systems — are usually assessed case-by-case by your DNSP based on local network capacity. This is exactly why self-consumption, not export, is what drives ROI at this system size. See Clean Energy Council’s DNSP connection guidance →
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
$
5,599
*
Small Home
- Tier 1 Solar Module
- 5kW Power Inverter
- 10,000w Tier 1 Panels
- High Efficiency Solar Module
13KW
Solar System
Medium homes and small business
$
6,999
*
Medium Home
- Tier 1 Solar Module
- 8kW Power Inverter
- 13,000w 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 50kW Solar System
For a 50kW solar system, the number of panels, inverter setup, and required roof area will vary depending on the panel wattage and type of roof. Commercial roofing materials, such as flat concrete, corrugated iron, and Colorbond, each require different mounting solutions, which can impact the overall system layout and installation cost.
| Panel Wattage | Panels Required | Approx. Roof Area | Best For |
|---|---|---|---|
| 400W | 125 panels | ~213 m² | Standard commercial |
| 420W | 119 panels | ~202 m² | Most common — efficiency/cost balance |
| 450W | 112 panels | ~190 m² | Higher efficiency, space-constrained |
| 500W | 100 panels | ~170 m² | Premium / bifacial / large-format |
| 550W+ | 91 panels | ~155 m² | Ultra-high efficiency / industrial |
*Roof area includes 300mm inter-panel clearances, perimeter setbacks per AS/NZS 5033, and installer access pathways. Flat commercial roofs with tilt frames require 20–30% additional space for inter-row shading avoidance at standard 10°–15° tilt angle.
50kW Solar System Cost in Australia
Get a fully installed 50kW commercial solar system from Aussie Solar Tech from only $19,599, after the federal STC rebate .
What's included in our $19,599 price?
Tier 1 commercial panels (CEC approved) · Premium three-phase inverter · SAA-accredited commercial installation · Commercial roof-mounting hardware · Grid protection equipment (AS 4777 compliant) · Commercial monitoring system · DNSP application fully managed · STC rebate paperwork handled · Standard flat or pitched commercial roof.
| City | Aussie Solar Tech | Market Average (Apr 2025) | Your Saving |
|---|---|---|---|
| Sydney, NSW | $19,599 | $41,800 | ~$22,201 |
| Melbourne, VIC | $19,599 | $40,200 | ~$20,601 |
| Brisbane, QLD | $19,599 | $46,000 | ~$26,401 |
| Adelaide, SA | $19,599 | $45,700 | ~$26,101 |
| Perth, WA | $19,599 | $44,600 | ~$25,001 |
| Canberra, ACT | $19,599 | $50,400 | ~$30,801 |
| Hobart, TAS | $19,599 | $47,600 | ~$28,001 |
*Market average figures estimated from Solar Choice Commercial Price Index scaled to 50kW, April 2025. All prices include STC rebate and are ex GST. Final Aussie Solar Tech pricing may vary for complex buildings, tilt-frame flat roofs, switchboard/protection relay upgrades, extended cable runs, and premium equipment selections.
Additional Costs to Budget For
| Item | Typical Cost Range | When Required |
|---|---|---|
| Tilt frames (flat commercial roof) | $4,000–$9,000 | All flat commercial roofs |
| Switchboard / main upgrade | $1,000–$4,500 | Outdated or undersized switchboard |
| Protection relay | $2,000–$5,000 | Required by most DNSPs at 50kW |
| Extended cable runs (>40m) | $1,000–$4,000 | Large buildings, remote plant rooms |
| DNSP application fee | $500–$1,800 | All states |
| Engineer-certified single line diagram | $800–$2,000 | Required by most DNSPs at 50kW |
| Commercial battery storage | $25,000–$70,000+ | Optional — for evening/overnight coverage |
Quick Summary: 50kW Solar System Price Australia 2026
– Base installed price: $19,599 (after STC rebates)
– Market average across capital cities: $40,000–$50,500
– Your saving with Aussie Solar Tech: Up to $30,000
– Payback period: 1.5–3.2 years (business use)
– Estimated 25-year savings: $320,000+
– STC rebate value: $13,000–$19,000 (pre-applied)
Average Daily Solar 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 at 15°–20° tilt on a commercial pitched or tilt-framed roof, and 77% system efficiency. Winter output is typically 20–40% below these annual averages; summer output is 20–40% above.
| City | Peak Sun Hours/Day | Avg Daily Output | Annual Output | Data Source |
|---|---|---|---|---|
| Darwin, NT | 5.5 hrs | 197–226 kWh/day | ~78,000 kWh/yr | BOM/PVWatts v8 |
| Brisbane, QLD | 5.0 hrs | 180–203 kWh/day | ~70,490 kWh/yr | BOM/PVWatts v8 |
| Perth, WA | 4.9 hrs | 191–218 kWh/day | ~74,828 kWh/yr | BOM/PVWatts v8 |
| Adelaide, SA | 4.8 hrs | 181–204 kWh/day | ~70,490 kWh/yr | BOM/PVWatts v8 |
| Canberra, ACT | 4.6 hrs | 180–206 kWh/day | ~70,490 kWh/yr | BOM/PVWatts v8 |
| Sydney, NSW | 4.6 hrs | 170–189 kWh/day | ~65,700 kWh/yr | BOM/PVWatts v8 |
| Melbourne, VIC | 4.2 hrs | 157–180 kWh/day | ~61,143 kWh/yr | BOM/PVWatts v8 |
| Hobart, TAS | 3.8 hrs | 143–165 kWh/day | ~56,578 kWh/yr | BOM/PVWatts v8 |
*Assumes north-facing at 15°–20° tilt, 77% system efficiency, no shading. Based on BOM solar irradiance data and PVWatts v8. Real-world output varies with soiling losses (~2–3%/yr without regular cleaning), temperature derating (~10–15% in peak summer), inverter efficiency, and panel degradation (~0.5%/yr). Annual output figures assume 365-day average.
A 50kW system can generate over $13,000 in annual electricity savings in Adelaide
At 34c/kWh commercial rate with 90% self-consumption, a 50kW system in Adelaide generating 181–204 kWh/day saves approximately $22,500–$25,000 per year in electricity — before any tax benefits. At that rate, the pre-tax payback on our $19,599 system is under 12 months. Request a free Adelaide business case.
50kW Solar Payback & ROI by City
The payback table below estimates the potential returns for a business using around 200 kWh of electricity per day, such as a warehouse, large supermarket, or school. The calculations are based on 70% and 90% daytime self-consumption using commercial electricity rates. All figures are calculated using Aussie Solar Tech’s fully installed price of $19,599 and do not include any potential tax benefits.
| City | System Cost | Elec. Rate | Self-Consumption | Annual Savings | Payback (Pre-tax) |
|---|---|---|---|---|---|
| Sydney | $19,599 | 28c/kWh | 70% | $9,765 | 2.1 yrs |
| Sydney | $19,599 | 28c/kWh | 90% | $12,555 | 1.6 yrs |
| Brisbane | $19,599 | 25c/kWh | 70% | $8,719 | 2.3 yrs |
| Brisbane | $19,599 | 25c/kWh | 90% | $11,211 | 1.8 yrs |
| Melbourne | $19,599 | 22c/kWh | 70% | $6,930 | 2.9 yrs |
| Melbourne | $19,599 | 22c/kWh | 90% | $8,910 | 2.2 yrs |
| Adelaide | $19,599 | 34c/kWh | 70% | $13,416 | 1.5 yrs |
| Adelaide | $19,599 | 34c/kWh | 90% | $17,248 | 1.2 yrs |
| Perth | $19,599 | 30c/kWh | 70% | $12,705 | 1.6 yrs |
| Perth | $19,599 | 30c/kWh | 90% | $16,335 | 1.2 yrs |
| Canberra | $19,599 | 28c/kWh | 70% | $9,968 | 2.0 yrs |
| Canberra | $19,599 | 28c/kWh | 90% | $12,815 | 1.6 yrs |
*Assumes 200 kWh/day business electricity consumption. Commercial electricity rates based on competitive market offers, April 2025. No feed-in tariff credit assumed above 10kW export. Pre-tax only — commercial depreciation and tax incentives excluded. Request a personalised commercial business case.
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 50kW system is substantial — typically $14,000–$20,000 depending on your location zone and current STC spot price.
All Aussie Solar Tech prices have the STC rebate pre-applied — the $19,599 you see is what you pay after the rebate is deducted. We handle all STC paperwork at no additional charge.
For the official scheme rules, see the Clean Energy Regulator’s STC guidance.
Battery Storage for Commercial 50kW Systems
At 50kW, battery storage transitions from a nice-to-have to a serious operational and financial tool. Given that most DNSPs pay no meaningful feed-in tariff on commercial export above 10kW, every kilowatt-hour your business cannot consume during the day is essentially lost revenue. Battery storage captures that surplus and deploys it during evening peak-rate periods at 22c–35c/kWh — dramatically improving total system ROI.
| Battery Capacity | Evening Coverage | Best Business Type | Approx. Additional Cost |
|---|---|---|---|
| 30–50kWh | ~2–4 hrs evening | Retail, offices, schools closing at 6pm | $22,000–$42,000 |
| 50–100kWh | ~4–8 hrs evening | Warehouses, hospitality, extended hours | $40,000–$75,000 |
| 100–150kWh | Full overnight coverage | Aged care, hotels, cold storage, 24/7 ops | $70,000–$110,000 |
| 150kWh+ | Multi-day resilience | Critical infrastructure, remote sites, microgrids | $100,000+ |
For a typical warehouse or large retailer, a 50–100kWh commercial battery paired with a 50kW solar system provides excellent combined ROI — the battery payback often adds only 1–2 years to the overall system payback while capturing $3,000–$8,000 in additional annual savings. See our 60kWh battery guide and 100kWh battery guide for detailed pricing and business case analysis.
🔋Battery rebates available — act before December
The Australian government’s battery incentive scheme reduces on 31 December 2026. Businesses adding commercial battery storage before this date can access maximum incentives. Contact us for a combined solar + battery commercial quote.
Frequently Asked Questions
How much does a 50kW solar system cost in Australia?
Aussie Solar Tech’s fully installed 50kW commercial solar system starts from $19,599 after the federal STC rebate (ex GST). Market averages across Australian capital cities range from approximately $40,000–$50,000 depending on installer, equipment, and location. Our price includes Tier 1 panels, premium three-phase inverter, SAA-accredited installation, DNSP connection management, protection relay assessment, monitoring, and all compliance documentation.
How much energy does a 50kW solar system produce per day?
What is the payback period for a 50kW solar system?
Does 50kW solar system qualify for STC rebate?
What happens if my business outgrows 50kW?
Systems above 100kW move from the STC scheme to the Large-scale Generation Certificate (LGC) scheme, which involves more regulatory steps and longer DNSP approval timelines. If your consumption is trending past 250 kWh/day, it’s worth discussing a 100kW system before you hit that ceiling.
Will my 50kW system be export-limited?
Most 50kW systems run on a three-phase commercial connection, which DNSPs generally assess case-by-case rather than applying a fixed cap. Since most commercial tariffs pay little or no feed-in credit above 10kW export anyway, the system is designed to be sized and used for self-consumption rather than export.
Why Choose Aussie Solar Tech For Your 50kW Solar System?
Our commercial team has designed and installed 30kW–100kW solar systems for small businesses, schools, retail stores, and industrial properties across ACT, NSW, VIC, QLD, SA, and WA.
- Reduced Electricity Bills — Prices for electricity in Australia keep going up. With a commercial solar system, your business makes its own power and cuts monthly utility costs — many customers save up to 70%.
- Premium Products, Guaranteed Performance — Tier 1 solar panels, inverters, and battery systems from leading global brands, built for Australian conditions and backed by comprehensive warranties.
- Brand Image and Sustainability — Going solar strengthens your business’s environmental credentials with customers, partners, and investors increasingly prioritising clean energy.
- Energy Independence & Stability — Reduced reliance on the grid protects your business from blackouts and unexpected rate hikes.
- Expert Local Installers — SAA-certified, in-house installation teams with years of local experience handling permits, grid connections, and final inspection.
- Unmatched 24/7 Support — Continuous help, support, and maintenance throughout the entire lifespan of your system.
Get Your Commercial Quote → Fully installed · After STC rebate
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.
