A 100kW commercial solar system in Melbourne generates around 360 kWh a day on average, or roughly 130,000 kWh a year. It is built for large warehouses, manufacturing plants, cold storage, shopping centres and office complexes with high, consistent daytime electricity demand.
100kW is also the largest size that qualifies for Small-scale Technology Certificates, which makes it a popular choice for sites that want maximum generation with an upfront STC discount. Silicon Solar manages the engineering, approvals, installation and commissioning end to end.
100kW Solar System at a Glance
| Specification | 100kW Solar System |
|---|---|
| Panels | Around 210 to 230 panels at 440W or larger |
| Inverter | Multiple three phase commercial inverters totalling 100kW |
| Roof space needed | About 480 to 520 square metres of usable roof |
| Average daily output in Melbourne | About 360 kWh |
| Estimated yearly output | About 130,000 kWh |
| Best suited to | Large warehouses, manufacturing, cold storage, shopping centres |
| Warranties | 25 year panel performance, 10 year inverter (brand dependent) |
Output figures are estimates based on Melbourne’s average solar exposure of roughly 3.6 kWh per kW of panels per day. Actual generation depends on roof orientation, tilt, shading and season. Panel counts vary with the module wattage chosen.
Commercial Grade Solar Panels
Around 210 to 230 x 440W+ Solar Panels
- Tier 1 commercial grade solar modules
- 440W and larger high efficiency panels
- All panels on the Clean Energy Council approved list
- 25 year panel performance warranty
- Local Australian warranty support
Three Phase Commercial Inverters
Three Phase Inverters Totalling 100kW
- Multiple inverters for redundancy and easier servicing
- Brands such as Fronius, Sungrow, GoodWe and Solis
- Remote online monitoring
- Network protection and export control where required
- 10 year warranty on most commercial models
Commercial Roof Mounting
Panel Mounting System
- Racking for tin, Klip-Lok, tile and flat commercial roofs
- Tilt frames to improve output on low pitch roofs
- Anodised aluminium, corrosion resistant
- Engineered for Australian wind loads
- Layouts that keep roof access and walkways clear
Commercial Solar Installation
Installation by Silicon Solar
- Solar Accreditation Australia (SAA) accredited, licensed electricians
- Work scheduled around your trading hours
- Network application and export approval handled for you
- Certificate of Electrical Safety (CES) provided
- Commissioning, monitoring setup and handover
Is a 100kW System Right for Your Site?
A 100kW system suits sites using roughly 300 kWh or more during daylight hours, such as:
- Large warehouses, logistics and cold storage facilities
- Manufacturing and processing plants
- Shopping centres and large format retail
- Office complexes, aged care and large education campuses
Smaller sites may get a better return from a 50kW system.
What a 100kW System Means for Your Operating Costs
At around 130,000 kWh a year, a 100kW system can offset a large share of a high consumption site’s daytime grid purchases. Savings depend on your tariff, demand profile and how much generation is used on site, which we model before you commit.
- Significant reduction in daytime energy charges
- Long term protection against electricity price rises
- Support for sustainability reporting and customer expectations
- A platform for future battery storage and EV fleet charging
How We Deliver Your 100kW Solar System
- Energy review. We analyse 12 months of bills or interval data to see when your site uses power.
- Site inspection. We check roof structure, orientation, shading, switchboard capacity and supply.
- Design and proposal. You receive a system design with expected generation, savings and payback.
- Approvals. We manage the network connection application and any export limits your distributor sets.
- Installation and commissioning. Our team installs with minimal disruption, then commissions and tests the system.
- Monitoring and support. You get live monitoring and a local team for warranty and service.
STC Discount, Tax and Finance
Commercial systems up to 100kW are eligible for Small-scale Technology Certificates (STCs) under the federal Small-scale Renewable Energy Scheme. We apply the STC discount directly to your quote, which can make a meaningful difference to the upfront cost. Solar equipment may also be depreciable for tax purposes, so speak with your accountant about how it applies to your business.
Finance options are available, so you can start saving without a large upfront outlay and protect your cash flow.
Why Melbourne Businesses Choose Silicon Solar
Silicon Solar has been installing solar across Victoria since 2015. We are a CEC Approved Solar Retailer, a Solar Victoria Authorised Retailer and NETCC approved, with more than 4,000 customers served and a 4.9 star Google rating.
- Systems designed from your real load profile, not a generic package
- Only Clean Energy Council approved panels and inverters
- Accredited installers and one point of contact from proposal to handover
- Network approvals, STCs, CES and metering managed for you
- Finance options and local Victorian after sales support
Compare other sizes: 25kW commercial solar system and 50kW commercial solar system, or see all commercial solar systems.
Frequently Asked Questions
On average about 360 kWh per day, or roughly 130,000 kWh per year, depending on roof orientation, tilt and shading.
About 480 to 520 square metres of usable roof, using around 210 to 230 panels of 440W or larger.
Yes. 100kW is the maximum size eligible for Small-scale Technology Certificates. Systems above 100kW fall under the Large-scale Renewable Energy Target instead.
Yes. Your distributor must approve the connection and may set export limits or protection requirements. We prepare and manage the application.
Yes. Finance options are available so your business can install solar without affecting cash flow.
Timing depends on approvals, roof access and site requirements. We give you a project timeline in your proposal and schedule work around your operations.