Solar System Sizes for Business
Understand common kW system sizes and find the right fit for your business.
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Across IT, print, LED and commercial solar solutions Australia-wide.
What size commercial solar system does my business need?
Most businesses don’t need the biggest system possible — they need the right system size designed around when and how they use electricity.
The goal of commercial solar sizing is to maximise onsite solar consumption, reduce reliance on grid power, and improve ROI over time.
Commercial solar system size is based on:
- your last 12 months of electricity bills
- operating hours and daytime load profile
- available roof or site space and shading
- export limits and grid connection requirements
- switchboard capacity and compliance needs
- future plans (EV charging, expansion, electrification)
Solar System Sizes
#Find the Right Commercial Solar System Size
Below is a simple guide to common commercial solar system size ranges. Your best fit depends on your roof space, operating hours and how much of the solar power your business can use onsite.
30kW – 75kW Commercial Solar Systems
Small to Medium Businesses
Solar systems in the 30kW–75kW range suit offices, retail, clinics, hospitality venues and smaller industrial sites with steady daytime energy use. This size is often chosen to maximise self-consumption and reduce reliance on grid power during business hours.
We’ll recommend the right fit based on your bill, operating hours and available roof space, then confirm what’s practical based on site constraints, compliance requirements and approvals so the system performs as expected.
100kW - 250kW Commercial Solar Systems
Growing Businesses
Systems in the 100kW–250kW range suit growing businesses with higher energy demand, including manufacturing, food and beverage, clubs, logistics, education and larger retail. This band is typically sized around daytime baseload to improve savings and cost certainty.
Design at this scale may also consider demand patterns, metering configuration and export limits. We’ll size the system around how your site uses energy and leave room to scale as your business grows.
250kW – 500kW Commercial Solar Systems
Designed for High-Load Commercial Facilities
The 250kW–500kW range is designed for high-load commercial and industrial facilities such as warehouses, processing sites, cold storage and larger manufacturing operations. These systems can deliver strong results when engineered around onsite usage rather than excessive export.
At this size, switchboard capacity, roof structure, network approvals and export constraints can influence design. We’ll tailor the system size to your load profile and confirm what’s achievable for your site.
500kW – 1MW Commercial Solar Systems
Built for Industrial-Scale Energy Use
Solar systems in the 500kW–1MW range suit industrial-scale energy use across distribution centres, multi-building sites, large manufacturing and high-throughput operations. This size band is often used to materially reduce grid reliance and improve long-term cost control.
Projects at this scale typically require detailed engineering and approvals, along with careful integration into existing electrical infrastructure. We’ll recommend a practical size and staging approach based on your operational needs.
1MW+ Commercial Solar Solutions
Engineered for Enterprise & Infrastructure Projects
1MW+ systems are custom engineered for enterprise and infrastructure sites with significant energy demand, including large industrial facilities, agribusiness and complex multi-site operations. This category can also include ground-mounted and solar farm-style projects (where approvals allow).
Design considerations can include multiple arrays, export management, compliance requirements and network approvals. We’ll work from your usage data and site constraints to recommend the right capacity and rollout path.
#🎥 Hear From One of Our Clients
"Sharp EIT made the switch to solar effortless. The install was fast, the team was great to deal with". Joe Kelly, CEO of North Ryde RSL.
#Solar Rebates & Incentives for Businesses
Commercial solar incentives can vary by system size, location and how your site is metered. Many business installations may be eligible for renewable energy certificates (such as STCs or LGCs) and, in some states, additional programs may apply depending on your industry and project structure.
Because eligibility can change and approvals can influence what’s practical, we’ll talk you through what applies to your business and the best way to structure your commercial solar system.
#Need Help Choosing a Solar System Size?
Get expert advice on selecting the right commercial solar system for your energy usage, business type, and infrastructure - from 30kW systems to multi-megawatt installations.
#FAQs About Commercial Solar System Sizes
The right size depends on how much electricity you use and when you use it. A commercial solar system is usually sized to maximise daytime self-consumption and avoid over-exporting, which can reduce returns.
It comes down to your daytime baseload, operating hours, roof or land space, and your tariff. Larger sizes can suit higher energy demand, but export limits, approvals and electrical infrastructure can influence what’s practical.
A 50kW solar system can generate around 70,000kWh per year, while a 100kW system can produce about 140,000kWh annually. Larger systems like 250kW–500kW can generate several hundred thousand kilowatt-hours depending on location and system design.
Not always. If your system is too large for your onsite usage, you may export more solar to the grid, which can lower the overall value depending on feed-in rates, tariffs and network rules.
Your load profile, demand peaks, energy tariffs, switchboard capacity, shading, roof structure, export limits, and network approvals can all influence the best commercial solar system size.
Yes. Many businesses stage a commercial solar installation to align with budgets, growth plans, site works or approval requirements. Staging can also help confirm performance before expanding capacity.
Not necessarily, but battery storage can help if your business uses more power after hours, exports a lot of solar, or wants added resilience. In some cases, batteries improve self-consumption and strengthen the business case.
Generation varies by location, roof orientation, shading and system design. As a guide, commercial solar output is typically estimated using your site conditions and local solar irradiance rather than a one-size-fits-all number.
Often, yes. Depending on size and location, commercial systems may require network approval, export limits confirmation, metering changes and engineering checks, particularly on larger installations.