Estimate the right commercial solar system size for your business based on your electricity spend, business type, and available roof space.
Recommended System Size
140 – 170 kW
Based on $5,000/month electricity spend in NSW
Offices have consistent 9-5 consumption, so solar self-consumption is high
Estimated Annual Consumption
200,000 kWh
Recommended System Size
155 kW
Annual Production
200,389 kWh
Estimated Incentive Value
$26,949
Estimated Annual Savings
$60,117/yr
Frequently asked questions
What size solar system does a warehouse need?
Warehouses commonly need 30 kW to 100 kW or more, depending on floor area, equipment loads, and daytime operating hours. Sites with refrigeration or heavy machinery sit at the higher end.
How do I size a solar system for my business?
Match system output to your daytime consumption. A common rule of thumb is to size to your daytime baseload so most generation is self-consumed rather than exported at low feed-in rates.
Can a commercial solar system be too big?
Yes. Oversizing beyond your daytime consumption exports excess energy at low feed-in rates, which lengthens payback. The right size balances self-consumption against upfront cost.
How does business type affect solar system size?
Business type determines when energy is consumed. A retail store uses most power during trading hours that align well with solar generation. A cold-storage warehouse runs 24/7 with lower self-consumption. The calculator adjusts the sizing estimate by consumption profile.