For many Brisbane businesses, electricity bills are among the highest recurring expenses. With rising energy prices and increasing awareness around sustainability, more companies are turning to solar as a long-term solution. The question that often arises is not whether to go solar, but which system size makes the most sense for their operations.
In this blog , we’ll explore three of the most popular options for commercial properties: 20kW, 30kW, and 50kW solar systems. By the end, you’ll have a clear idea of which system could meet your business needs and deliver the best return on investment.
Why Brisbane Businesses are Moving Towards Solar
Brisbane enjoys an average of more than 280 sunny days each year, making it one of the best places in Australia for solar power generation. This abundant sunshine translates into greater efficiency and faster payback periods for solar installations.
Beyond the financial benefits, commercial solar also provides businesses with:
- Cost savings – Lowering monthly power bills and protecting against rising electricity costs.
- Energy independence – Reducing reliance on the grid and safeguarding against outages.
- Sustainability – Demonstrating environmental responsibility to clients, investors, and the community.
- Long-term value – Adding to the appeal and value of the property itself.
However, achieving these benefits depends on choosing the right system size and working with trusted commercial solar installers.
20kW Solar System – An Entry-Level Commercial Option
A 20kW solar system is a popular choice for small businesses with moderate energy demands. It’s ideal for businesses that want to reduce costs but don’t require large-scale energy production.
How Much Energy Does a 20kW System Produce?
On average, a 20kW solar system in Brisbane can generate 80–90 kWh of electricity per day. This production is sufficient to cover the energy needs of small offices, retail shops, or businesses with daytime operating hours.
Who is it Suitable For?
- Small offices with fewer than 20 staff
- Cafés, restaurants, and takeaway outlets
- Local retail stores
- Medical clinics or professional services practices
A 20kW solar system typically requires adequate roof space. It is well-suited for businesses with modest energy use and limited roof space, making it a cost-effective solution.
30kW Solar System – Balancing Power and Cost
The 30kW system offers more flexibility for medium-sized businesses, striking the right balance between capacity and affordability.
Energy Production
A 30kW system generates 120–135 kWh per day, enough to power businesses with higher energy demands without stepping into large-scale system territory.
Who is it Suitable For?
- Medium-sized office buildings
- Warehouses with light to moderate equipment
- Small manufacturing facilities
- Businesses with multiple sites but moderate energy loads
A 30kW solar system is ideal for companies with moderate to high energy usage, offering an efficient and reliable renewable energy solution. It helps reduce dependence on the grid while supporting long-term sustainability goals.
50kW Solar System – High-Capacity for Larger Operations
For businesses with high energy usage, the 50kW solar system provides robust output and long-term cost savings. It is one of the largest system sizes eligible for Small-scale Technology Certificates (STCs), which makes it financially appealing.
Energy Production
A 50kW system can generate 200–220 kWh per day in Brisbane conditions. This makes it suitable for large-scale operations with significant energy demands.
Who is it Suitable For?
- Factories and industrial operations
- Large warehouses and logistics centres
- Hotels, clubs, and hospitality venues
- Schools, universities, and training facilities
- Large office complexes
A 50kW solar system is well-suited for larger businesses with significant energy demands. It offers a powerful solution to reduce reliance on the grid and achieve long-term energy savings while supporting sustainability goals.
Factors to Consider Before Choosing a System
When selecting between a 20kW, 30kW, or 50kW solar system, businesses should take into account:
- Electricity Usage – Review your last 12 months of energy bills to determine your average daily consumption.
- Roof Size and Orientation – Your installer will need to assess roof availability, shading, and panel positioning for maximum efficiency.
- Budget and Financing – Larger systems require higher upfront investment, but they often deliver stronger long-term returns.
- Business Growth Plans – If you expect your energy needs to increase, it may be worth investing in a slightly larger system now.
Why Expert Installation Matters
Choosing the right system is only half the equation. Professional installation is critical to ensuring your system performs as expected. Skilled commercial solar installers can:
- Conduct a detailed site inspection and energy audit
- Design a system tailored to your business’s specific needs
- Manage permits and approvals with the local energy distributor
- Install equipment according to Australian safety standards
- Offer warranties, monitoring, and after-sales support
By working with experts, you gain peace of mind knowing that your system is designed for maximum efficiency and long-term reliability.
Investing in solar is one of the smartest financial and environmental decisions a Brisbane business can make. Whether you need a 20kW, 30kW, or 50kW solar system, the right choice depends on your energy usage, roof capacity, and business goals.
- 20kW systems are best for small businesses with modest consumption.
- 30kW systems suit medium-sized businesses needing more power without excessive investment.
- 50kW systems are ideal for large-scale operations with significant energy demands.
Quick Solar is a trusted name in providing reliable and cost-effective solar energy solutions for businesses across Brisbane.
With years of experience, a team of expert commercial solar installers, and a commitment to quality, Quick Solar helps companies reduce energy costs, achieve sustainability goals, and enjoy long-term savings.
Whether your business is small, medium, or large, Quick Solar designs and installs the right solar system to match your energy needs.
With expert guidance from professional installers, you can select the perfect system size and start benefiting from reduced electricity bills and greater energy independence.
If your business is ready to make the switch, contact experienced commercial solar installers in Brisbane to request a tailored proposal. The right solar system can provide savings for decades to come.