20kW Commercial Solar System
Compare commercial sizes
20kW commercial solar quick facts
A practical starting point for smaller businesses with steady daytime electricity use.
Estimated output
70–100 kWh/day
Indicative annual-average day
Typical application
Small offices and retail stores
Best matched to daytime use
Planning roof area
Confirmed at site review
Panel layout, access and setbacks
Power supply
Assessed on site
Often a three-phase configuration
Battery storage
Optional
Assessed against your operating hours
Is this system a good fit for your business?
Often suits
- Small offices and retail stores
- Clinics and cafes
- Small workshops and light commercial sites
- Businesses with meaningful daytime electricity use
Consider a larger or custom system if you have
- Large air conditioning or refrigeration loads
- Machinery running throughout the day
- Plans for EV charging or business growth
How much could it generate?
Indicative annual-average daily output
70–100 kWh/day
Actual generation depends on your roof, location, shading, system design and weather.
Brisbane
~84kWh / average day
Sydney
~80kWh / average day
Melbourne
~72kWh / average day
Calculated from Australian Government typical daily yields per kW, averaged over a year. These are location guides; your proposal includes a site-specific estimate.
Read the government generation guideWhere can the solar go?
Commercial solar works best when your business uses a meaningful amount of electricity during daylight hours. We review your actual electricity usage before recommending a system size.
Lighting
Air conditioning
Computers
Refrigeration
Machinery
Pumps
EV charging
Business equipment
We size the system from your actual electricity use
For larger commercial sites, we can review electricity bills and interval usage data from your electricity meter, where available.
Send us recent bills
We review your daytime electricity use
We recommend a practical system size
What's included
Commercial solar panels
Quality panels selected for the final commercial design.
Inverter & monitoring
An inverter configuration matched to your site, with monitoring.
Mounting & electrical
Mounting, electrical work and safety equipment specified for your building.
Design & approvals
Site-specific design and required electricity network paperwork.
Will it fit your site?
Roof area confirmed with your design
A smaller commercial roof may be suitable. We check usable space around roof equipment, shading and safe access before confirming the layout.
- Roof space and shading affect the layout
- Roof structure and access must be suitable
- Electrical infrastructure is checked before installation
Required area depends on the selected panels, roof setbacks and access paths. We confirm a usable roof-space estimate in your proposal.
Should your business add a battery?
Battery storage can help shift solar energy into later operating hours, but it does not make financial sense for every business.
We assess battery value against your operating hours and electricity tariff.
Where storage may help
- Use solar later in the day
- Reduce some peak grid usage
- Support selected backup needs with suitable equipment
- Support future energy strategies
What does a 20kW commercial solar system cost?
Commercial pricing depends on your roof, equipment, switchboard, access and installation requirements.
System size
Roof & access
Electrical works
Optional battery & monitoring
Payback and savings depend on your tariff, usage profile, system design and site conditions. AZ Solar models the system against your actual business electricity usage.
Why AZ Solar?
Appropriately accredited installers
Licensed electrical work and relevant SAA accreditation for solar design and installation.
Clear proposals
A design based on your electricity use, with equipment and installation scope explained.
QLD, NSW & VIC support
Support across AZ Solar's stated service regions.
Planned around your business
Installation works scheduled to minimise disruption where practical.
What AZ Solar customers say
General AZ Solar customer feedback, including residential installations.
“Excellent work, highly appreciated and recommended to my friends. Very professional and very quick service. Explains everything very clearly. Good work and best wishes to you, thanks.”
“My solar app was not connecting, but Ronnie from AZ Solar Services helped me get it connected quickly. The team is always responsive whenever I need assistance, and I'm very happy with their professional service.”
Commercial solar incentives
Eligible systems may receive an upfront reduction through Australia's Small-scale Renewable Energy Scheme.
We calculate applicable incentives as part of your proposal. Eligibility depends on the final system and scheme rules; custom projects may fall under a different scheme.
Business tax treatment depends on your circumstances. Speak with your accountant or tax adviser.
Check official scheme eligibilityFrom energy review to installation
Energy Review
We review your electricity use and site requirements.
System Design
We recommend a system matched to your business and roof.
Installation
Works are scheduled to minimise disruption where practical.
Commissioning & Monitoring
We test the system and set up monitoring.
Questions businesses ask
20kW Commercial Solar System FAQs
Clear answers before you request a proposal.
Not sure what size your business needs?
Send us your recent electricity bills and site details. We'll recommend a system based on how your business actually uses power.