Commercial Solar in Melbourne costs approximately $26,000 for a 30kW system and $77,000 for a 100kW system in 2026, after federal incentives. Businesses can reduce electricity bills through daytime solar generation. Eligible installations may also receive Victorian Government discounts, improving their return on investment.
For Melbourne businesses, installing solar panels can reduce operating expenses and support long-term energy planning. However, installation costs, electricity savings and available rebates vary between properties.
This guide explains commercial solar costs, government incentives, potential savings and how to select a suitable system.
How Much Does Commercial Solar Cost in Melbourne in 2026?
Commercial solar cost in Melbourne depends on system size, roof conditions, equipment quality and electrical infrastructure.
Larger installations generally cost less per kilowatt because businesses can spread installation expenses across more panels.
Commercial Solar System Prices by Size
| System size | Estimated installed cost | Suitable business |
| 10kW | $9,000–$12,000 | Small offices and retail shops |
| 30kW | $25,000–$32,000 | Cafés and small warehouses |
| 50kW | $44,000–$55,000 | Medium warehouses and offices |
| 100kW | $75,000–$90,000 | Factories and large commercial properties |
Indicative 2026 prices, including GST and federal STC discounts where eligible. Additional Victorian Energy Upgrades discounts are not deducted.
For example, a 30kW system may suit a business operating primarily during daylight hours. Meanwhile, manufacturing facilities with higher energy consumption may benefit from larger installations.
However, roof repairs, switchboard upgrades and network connection requirements can increase the final installation cost.
What Commercial Solar Rebates Are Available in Melbourne?
Melbourne businesses can access federal renewable energy incentives and eligible Victorian Government energy upgrade discounts.
Federal Commercial Solar Rebates Through STCs
The Small-scale Renewable Energy Scheme provides financial incentives through Small-scale Technology Certificates (STCs).
Eligible commercial systems up to 100kW can receive an upfront STC benefit. Certificate quantities depend on location, system capacity and installation year.
For example, an eligible 30kW system in Melbourne may generate 177 STCs in 2026. At an illustrative certificate price of $39, this represents approximately $6,903 in discounts.
From 1 October 2026, eligible systems above 100kW and up to 1MW can also access STCs under new mid-scale rules. Applications for these larger systems are scheduled to open in mid-to-late November.
Victorian Energy Upgrades (VEU) Commercial Solar Discounts
The Victorian Energy Upgrades program provides additional discounts for eligible commercial solar installations between 30kW and 200kW.
Businesses must use an appropriately accredited VEU provider and meet the program’s technical requirements.
| System size | Indicative VEU discount |
| 50kW | $4,550 |
| 75kW | $6,860 |
| 100kW | $9,100 |
| 150kW | $25,760 |
| 200kW | $34,300 |
Indicative Victorian Government figures based on a $70 certificate price. Actual discounts vary and may be combined with eligible federal incentives
These incentives can significantly reduce upfront costs. Therefore, businesses should confirm eligibility before accepting an installation quote.
How Much Can Melbourne Businesses Save with Commercial Solar?
Commercial solar savings depend on electricity consumption, energy tariffs and the amount of solar power used onsite.
Businesses operating during daylight hours often benefit most because they can consume solar electricity directly.
For example, a warehouse using electricity for lighting, machinery and cooling throughout the day may achieve substantial savings.
Commercial Solar Payback Period and ROI
Consider a Melbourne business installing a 30kW solar system for $28,000 after applicable discounts.
Assume the system generates 40,000kWh annually. If the business uses 80% onsite, it consumes 32,000kWh of solar electricity.
At an assumed electricity rate of $0.25 per kWh, direct savings reach $8,000 annually.
The remaining 8,000kWh could generate another $400 at an illustrative export rate of $0.05 per kWh.
| Financial estimate | Annual value |
| Installation cost | $28,000 |
| Electricity purchase savings | $8,000 |
| Export income | $400 |
| Total annual benefit | $8,400 |
| Simple payback period | 3.3 years |
This example assumes stable electricity rates and excludes maintenance, financing and tax considerations.
Actual results may differ, particularly for businesses with demand charges or limited daytime electricity consumption.
Is Commercial Solar Worth It for Melbourne Businesses?
Yes, commercial solar can be a worthwhile investment for Melbourne businesses with suitable roof space and consistent daytime electricity demand.
Generating electricity onsite reduces reliance on grid purchases. Consequently, businesses can lower operating expenses over the system’s lifespan.
Solar installations may also support sustainability targets and help reduce operational carbon emissions.
However, businesses with low daytime consumption should carefully assess system sizing. Export restrictions and lower feed-in tariffs can reduce the financial value of unused electricity.
For this reason, a detailed energy assessment is essential before investing.
How to Choose the Right Commercial Solar System
Selecting the right commercial solar system starts with understanding your business’s electricity usage.
Review at least 12 months of electricity bills and interval meter data. This helps identify peak consumption periods and suitable system capacity.
Next, assess roof structure, available space, shading and installation access. Large commercial rooftops may also require additional structural assessments.
Compare solar panel efficiency, inverter performance, equipment warranties and installation workmanship.
Businesses should also confirm grid connection requirements and potential export limitations with their electricity distributor.
Finally, choose an experienced commercial solar installer who can provide realistic generation forecasts and financial estimates.
Conclusion
Yes, Commercial Solar is a practical investment for Melbourne businesses seeking lower electricity costs and long-term energy savings.
Government incentives can reduce upfront expenses, while suitable system sizing can improve financial returns. However, every business needs an installation designed around its electricity consumption and property requirements.
Looking to install commercial solar in Melbourne? Contact Grow Savings Pty Ltd for a personalised solar assessment and installation quote. Explore a system designed to reduce your business’s energy costs.
Frequently Asked Questions
1. How much does a 30kW commercial solar system cost in Melbourne?
A 30kW commercial solar system typically costs approximately $25,000 to $32,000 in Melbourne in 2026. Prices vary with equipment and installation requirements.
2. Are there government rebates for commercial solar in Victoria?
Yes. Eligible businesses can access federal STC incentives and Victorian Energy Upgrades discounts. Eligibility depends on system size and program requirements.
3. How long does commercial solar take to pay for itself?
Commercial solar may achieve a simple payback period of three to six years. Actual results depend on installation costs and electricity consumption.
4. Can businesses install commercial solar systems larger than 100kW?
Yes. Businesses can install systems larger than 100kW. New federal rules allow eligible systems up to 1MW to access STCs.