Commercial Solar Perth: Is It Worth It for Your Business?

Perth businesses pay some of the highest commercial electricity tariffs in Australia, and with 3,000+ hours of sunshine per year, the case for commercial solar is compelling. Here's how to evaluate it for your business.

Commercial Solar System Sizes

Small business (under 30kW): Retail stores, small offices, cafes. 20–30kW system costs $20,000–$35,000 after STCs. Payback period: 3–5 years. Medium commercial (30–100kW): Warehouses, larger offices, industrial. $40,000–$100,000 installed. Payback: 3–6 years. Large commercial (100kW+): Manufacturing, large industrial sites. Often structured with Power Purchase Agreements (PPAs) requiring minimal upfront capital.

Incentives for Commercial Solar in Perth

Small-scale Technology Certificates (STCs): Available for systems under 100kW. The certificate value is deducted from the purchase price at point of sale — reducing costs by $15,000–$30,000 for a 30kW system. Large-scale Generation Certificates (LGCs): For systems over 100kW under the Large-scale Renewable Energy Target. Instant asset write-off: Commercial solar qualifies for instant asset write-off under current ATO rules — check current limits with your accountant.

Key Considerations

Roof condition and remaining lease term. Daytime vs. night-time energy usage profile (solar only helps when the sun shines). Network connection capacity. Battery storage to extend self-consumption into evening hours. PPA vs. purchase — PPAs have no upfront cost but lower savings.