Commercial Solar for
Melbourne Business
Supply Solar delivers commercial solar Melbourne businesses rely on — from 20kW small business systems to 150kW+ industrial arrays. We assess your site, size the system to your actual load, and handle every incentive: STCs, LGCs, and instant asset write-off guidance.
Free Commercial Solar Assessment
Site assessment · Sizing · Incentive confirmation
No obligation · We call within 2 business hours
How Big a Solar System Does My Business Need?
| System size | Annual generation (Melbourne) | Annual bill saving est. | Roof space required | Incentive type | Best suited to |
|---|---|---|---|---|---|
| 20–30 kWSmall commercial | 26,000–40,000 kWh/yr | $6,500–$14,000/yr | ~120–180 m² | STC upfront discount | Cafes, retail, medical, small office |
| 30–50 kWSmall–medium | 40,000–67,000 kWh/yr | $10,000–$24,000/yr | ~180–300 m² | STC upfront discount | Larger retail, trade businesses, schools |
| 50–99 kWMedium commercial | 67,000–133,000 kWh/yr | $17,000–$47,000/yr | ~300–600 m² | STC upfront discount | Warehouses, manufacturers, strata |
| 100–150 kWLarge commercial | 133,000–200,000 kWh/yr | $33,000–$70,000/yr | ~600–900 m² | LGC ongoing revenue | Large warehouses, factories, industrial |
| 150 kW+Industrial | 200,000+ kWh/yr | $50,000+/yr | 900+ m² | LGC ongoing revenue | Manufacturing, cold storage, large industrial |
Estimates based on Melbourne solar irradiance (~4.4 peak sun hours/day, north-facing roof) and commercial grid tariffs of $0.25–$0.35/kWh. Actual results vary by site. All figures before incentives.
We Install Commercial Solar for Every Type of Business
Every business has different roof space, usage patterns and incentive eligibility. Find your fit below.
Solar for Small Business
20–50kW systems designed for cafes, retail stores, medical centres, professional offices and trade businesses — sized to offset your daytime grid consumption and eligible for the STC upfront discount plus instant asset write-off.
- 20–50kW systems
- STC discount
- Tax depreciation
- Daytime load offset
Industrial Solar (100kW+)
Large-scale solar for factories, warehouses, logistics centres and manufacturing sites — systems above 100kW qualify for Large-scale Generation Certificates (LGCs), creating an ongoing revenue stream in addition to energy bill savings.
- 100kW+ systems
- LGC revenue
- Factories & warehouses
- Full O&M available
Strata & Apartment Solar
Shared solar for apartment buildings and body corporates — including Solar Victoria's Solar for Apartments program offering up to approximately $2,800 per household. Supply Solar handles the owners corporation process and rebate application.
- Body corporate solar
- Solar for Apartments rebate
- ~$2,800/household
- OC process managed
Commercial Solar Incentives
STCs, LGCs, the 100kW threshold, VEU, instant asset write-off and depreciation schedules — a full guide to every commercial solar incentive available in Victoria in 2026, and which applies to your business.
- STCs vs LGCs explained
- 100kW threshold
- Tax depreciation
- VEU commercial
Commercial Solar Incentives — STCs, LGCs & Tax
Three separate incentive streams apply to commercial solar in Victoria. Supply Solar confirms which apply to your system and handles every one.
| Incentive | System size | Value | How received | Who applies |
|---|---|---|---|---|
| Small-scale Technology Certificates (STCs) | Systems under 100 kW | Upfront discount at point-of-sale — typically $15,000–$35,000 on a 50–99kW system | Applied as a discount off your system price on the day of installation. No separate claim. | Supply Solar applies automatically |
| Large-scale Generation Certificates (LGCs) | Systems 100 kW and above | ~$30–$50 per certificate, earned as electricity is generated. A 100kW system earns ~3,000–4,500 LGCs per year | Ongoing revenue stream — sold through the Large-scale Renewable Energy Target (LRET) via a registered agent. | Registered LGC agent (Supply Solar advises) |
| Instant Asset Write-Off / Depreciation | Systems under $20,000 (net of STCs) — for now | Full deduction in the year of purchase at your company tax rate. The $20,000 threshold is legislated to drop to just $1,000 from 1 July 2026. | Claimed in your business tax return. Consult your accountant for eligibility under current ATO rules. | Your accountant |
| Victorian Energy Upgrades (VEU) — Commercial | LED lighting upgrades (not solar directly) | Point-of-sale discount on commercial LED lighting upgrades via accredited providers | Applied at invoice through Supply Solar as an accredited VEU provider. | Supply Solar (LED upgrades) |
| Solar for Apartments (Strata) | Eligible strata / body corporate buildings | Up to approximately $2,800 per household for shared solar installations | Applied via Solar Victoria application process — Supply Solar manages the application. | Supply Solar assists |
LGC values are approximate and subject to market rates. Tax incentive eligibility varies — consult your accountant. Supply Solar provides a full incentive summary in every commercial solar proposal.
What a 99kW Commercial System Delivers — Melbourne
A 99kW rooftop system stays just below the STC threshold — maximising the upfront discount while delivering substantial annual savings. Here's what the economics typically look like on a Melbourne commercial site.
Actual results vary by roof orientation, shading, tariff structure and self-consumption rate. Supply Solar models your specific site in every proposal.
Get a Commercial Solar QuoteSix Reasons Commercial Solar Makes Sense in 2026
Generate power at $0.05–0.10/kWh
Solar replaces grid electricity that costs Melbourne businesses $0.25–$0.40/kWh with energy at approximately $0.05–$0.10/kWh over the system's 25-year life — a locked-in, inflation-proof energy cost.
20–35% ROI per annum
Commercial solar consistently delivers stronger returns than most capital equipment purchases. With a 3–5 year payback and 25-year system life, the post-payback years are essentially free energy.
STCs reduce the upfront cost immediately
For systems under 100kW, Small-scale Technology Certificates are applied as a point-of-sale discount — reducing your invoice the day of installation, with no claim required from your business.
Tax depreciation accelerates the return
Commercial solar systems are depreciable business assets. Depending on the year and your business type, instant asset write-off or accelerated depreciation can bring forward a significant portion of the tax benefit.
Pair with battery for peak demand savings
Add a commercial battery to cap peak demand charges — often 30–50% of a business electricity bill. Solar generates, the battery stores and discharges at peak to minimise demand-based charges.
ESG credentials and energy independence
Commercial solar demonstrates credible sustainability commitment — relevant to tenders, customers, and reporting obligations. And locking in a portion of your energy cost removes exposure to future grid price increases.
How a Commercial Solar Project Works
Site assessment
We review your electricity bills, roof structure, orientation, and electrical infrastructure. We identify all applicable incentives.
System design & proposal
You receive a detailed proposal: system size, expected generation, annual saving, payback period, and all incentives already applied.
Approvals & permits
We handle grid pre-approval, council permits (if required), and all compliance documentation — no paperwork burden on your team.
Installation & commissioning
Our CEC-accredited team installs on schedule, commissions the system and monitoring, and hands you a complete handover pack.
Accredited, Award-Winning & Fully In-House
CEC-accredited — required for incentive eligibility
STC and LGC eligibility requires a CEC-accredited installer. Every Supply Solar commercial installation is completed by our own accredited team — protecting your incentives, warranties and grid approval.
2023 CEC Award & 2024 EUPD Award
Independent industry recognition of installation quality and customer experience — the benchmarks that matter to a business making a 25-year capital investment.
Incentives handled — not just mentioned
STCs applied at the point of sale, LGC set-up for 100kW+ systems, and full incentive documentation in every proposal. We don't list rebates and leave the paperwork to you.
O&M contracts — protect your ROI
Annual commercial solar maintenance — monitoring, thermal scanning, cleaning, inverter checks — keeps your system generating at its rated output for the full 25-year life.
Commercial Solar Installation Near Your Business
Supply Solar installs and services commercial solar systems across greater Melbourne and regional Victoria.
What Melbourne Businesses Say
"Supply Solar installed a 99kW system on our warehouse in Dandenong. They modelled the ROI from our actual bills, handled all the STC paperwork and had us generating in 5 weeks. Our electricity bill dropped 54%."
"We had a 35kW system installed for our medical centre. The proposal was detailed — actual savings projections, payback period, STC discount shown clearly. Professional from start to finish."
"Supply Solar managed our strata building's Solar for Apartments application — all the body corporate paperwork, rebate lodgement, and installation. 32 households now benefiting. Highly recommend."
Commercial Solar FAQs
How much does commercial solar cost in Australia?
What is the ROI on commercial solar in Australia?
How big a solar system does my business need?
What is the difference between STCs and LGCs?
Can small businesses claim solar on tax?
How long do commercial solar systems last?
What is the Solar for Apartments program in Victoria?
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Ready to Cut Your Business Energy Bill?
Book a free, no-obligation commercial solar site assessment. Supply Solar analyses your bills, models your ROI, and delivers a fixed-price proposal with every incentive already applied.
No obligation · STCs, LGCs & depreciation handled · CEC-accredited · Melbourne & Regional Victoria