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Copyright © 2026 LACHLAN ENERGY PTY LTD | ABN : 694 039 846
A 30kW solar system is a high-capacity solution built for large residential properties and mid-sized commercial operations. As energy prices continue to rise across Australia, more owners are turning to solar to take control of their power usage and cut long-term costs — with an excellent return on investment and a more sustainable future.
We provide fully customised systems that deliver maximum output and value. Our standard 30kW solar system includes:
All components are selected for performance, durability and compatibility with Australian weather conditions.
To install a 30kW solar system, you'll need:
A 30kW solar system with battery lets you store excess solar for use after sunset, on cloudy days or during a blackout — especially beneficial in areas with lower feed-in tariffs or time-of-use pricing.
We make installation simple, transparent and efficient — from start to finish, our team ensures your solar journey is smooth and results-driven.
We evaluate your roof layout, structure and energy usage.
A tailored solution with panel layout and battery integration.
We handle all applications under Australian regulations.
SAA-accredited installers complete the job in 1–3 days.
Your system is professionally tested, monitored and connected.
Lachlan Solar is trusted by residential and commercial clients across Australia. We're committed to delivering:
Designed to handle the demands of large homes and mid-sized businesses, a 30kW system delivers energy security, financial savings and sustainability in one smart investment.
A 30 kW solar system is best for small to medium-sized businesses such as offices, retail outlets, medical centres, restaurants and workshops with electricity bills of around $1,500–$2,500 per month. It's also a strong option for larger homes with high energy use or small farms running equipment during the day.
On average, a 30 kW solar system generates around 110–130 kWh of electricity per day, depending on location, weather and panel orientation. Northern states like Queensland and WA see higher yields, while southern regions may be slightly lower.
The number of panels depends on the wattage of the panels used:
Using higher-efficiency panels helps reduce roof space requirements and can make the installation more cost-effective.
A 30 kW solar system generally requires between 150–200 square metres of roof space, depending on the efficiency of the panels. Ideally, the roof should be free from shading and have enough open area for optimal performance.
In 2025, a high-quality 30 kW solar system in Australia typically costs between $25,000 and $38,000 after government rebates (STCs). The price varies based on the panels and inverter, the complexity of installation and any additional upgrades like switchboard or meter changes.
Businesses with steady daytime electricity demand benefit the most. Examples include:
By consuming most of the solar power during operating hours, these businesses maximise savings and shorten their payback period.
A 30 kW solar system can cut annual electricity costs by around $8,000–$12,000, depending on your energy usage patterns and location. Businesses save most when solar generation matches on-site demand, reducing the need to export to the grid.
For most Australian businesses, the payback period is typically 3 to 5 years. Businesses with high daytime usage recover costs faster, while those with lower on-site consumption may take slightly longer. Over the system's lifespan of 20+ years, the long-term savings can be substantial.
Get a free, no-obligation quote from a trusted Australian solar retailer.
Copyright © 2026 LACHLAN ENERGY PTY LTD | ABN : 694 039 846