A 90kW solar system is a powerful solar power solution designed for commercial properties with high electricity bills and significant daytime usage. Typically built with around 190 solar panels, it occupies approximately 450–550m² of roof space. This solar system can generate up to 400 kWh daily, providing consistent energy production that reduces dependence on the electricity grid.
Whether you’re managing a warehouse, school, or retail center, a 90kW solar panel system improves cash flow, lowers long-term energy costs, and positions your business as a sustainable leader in a sun-rich country like Australia. Solar Galaxy tailors each project to suit your available roof space and energy demands.
Choosing a 90kW solar power system is a smart investment for businesses aiming to reduce power bill costs, improve annual savings, and boost their energy resilience. Backed by the Australian Government’s STC rebate, this system delivers substantial upfront discounts and long-term financial returns.
Solar Galaxy provides only CEC-approved panels and SAA-certified installation teams to ensure every system performs optimally.
Dedicated, personalised support from start to finish—we’re with you every step of the way.
Locally owned and operated, powering every corner of Australia.
Your peace of mind is our priority—top-tier installations with a clear, step-by-step process.
Our commitment doesn’t end with installation. We’re here for the long run, even ten years from now.
A high-output system like 90kW requires a powerful inverters. Solar Galaxy recommends 110kW inverters that ensure maximum energy yield, system stability, and compatibility with future upgrades. We supply trusted brands such as Fronius, SMA, and SolarEdge for all installations.
Adding battery storage increases your system’s energy independence. Solar Galaxy installs 30kWh and 40kWh, 50kWh and even 100kWh (recommended) commercial-grade batteries, ideal for load-shifting and backup.
Eligible for the new federal battery rebate, these batteries can reduce upfront battery costs by up to $15,000, helping you save money and make the most of your solar production.
A 90kW solar system is tailored to commercial solar needs. If you’re looking for tailored options for smaller properties or homes, explore our residential solar and commercial solar offerings to compare system size and application.
Most 90kW systems use 190 – 200 panels, depending on their watt rating. We use 475w NTYPE Mono Crystalline Panels. The exact number may vary based on your chosen solar panel type and available roof space.
You’ll need around 450 to 550 square metres of usable roof area. Shade, tilt, and orientation also affect the final layout and system performance.
Due to its size, a 90kW solar system is best suited for commercial properties such as shopping centers, schools, or large warehouses.
In many cases, yes. Depending on your energy profile, it can produce enough power to supply your business during peak sunshine hours and even export excess.
We recommend a 110kW inverter, which ensures high conversion efficiency, smart monitoring, and scalable design.
We recommend 30kWh to 40kWh commercial batteries, especially with high overnight usage or backup needs.
Yes. Solar Galaxy ensures all systems are battery-ready, allowing easy upgrades when your business is ready to invest in storage.
Pricing varies based on components and site. Typically, systems range from $75,000 to $100,000 before rebates. The STC rebate can lower this by over $25,000, depending on your location.
Most businesses achieve payback in 3–5 years, faster with battery savings and government incentives.
Depending on usage and export rates, savings often range between $20,000 to $30,000 annually.
From approval to commissioning, installation takes 2–4 weeks, depending on site readiness and grid connection timing.
Our installers are SAA Certified and Clean Energy Council-accredited, meeting all required safety and compliance standards.
Expect between 360 to 400 kWh/day, depending on your location’s sunshine hours, tilt, and panel type.
Your system still works, but at reduced output. Battery storage helps smooth out dips in energy production during poor weather.
Solar panels typically last 25+ years with minimal degradation, and inverters often last 10–15 years with proper care.
Annual inspections and monitoring help maximise output and detect issues early. Solar Galaxy offers ongoing support plans.
Yes. We offer remote monitoring tools and service plans for full post-installation system support and performance tracking.
Ready to install a 90kW solar system? Request a Quote today with Solar Galaxy. Discover how much power and savings your rooftop can produce.
Find out more about the various Commercial Solar Systems that we install below
