Commercial Solar Australia 2026: Rebates, ROI and How to Choose the Right System
September 7th, 2026
Policy status: On 5 August 2026 the Australian Government announced it intends to expand Small-scale Renewable Energy Scheme (SRES) eligibility to qualifying solar PV systems above 100 kW and up to 1 MW, intended to apply to eligible installations from 1 October 2026. This is proposed, not yet in force. It remains subject to the necessary regulations and final eligibility, design, installation and compliance requirements.
Short answer
Australian businesses installing commercial solar in 2026 can typically reduce upfront project cost through Small-scale Technology Certificates (STCs), state-based programs such as Victoria’s VEU and NSW’s battery incentive, and tax depreciation where applicable and subject to professional tax advice. For systems above 100 kW, the government’s own published estimates suggest the proposed SRES expansion could cut upfront costs by roughly 20%, with indicative discounts of around $68,000 on a 250 kW system and around $230,000 on an 850 kW system. The final value depends on system size, postcode zone, installation date, the applicable deeming methodology, certificate market price, agent fees and final scheme rules, and the scheme is not yet law.
This guide covers: what’s changing under the SRES, whether federal and state incentives stack, indicative costs and payback, how to size a system, how to compare panels, and how to choose an EPC or installer.
What commercial solar incentives are available in 2026?
Commercial solar incentives up to 100 kW (current scheme)
Scheme: Small-scale Renewable Energy Scheme (SRES)
How it works: Eligible solar PV systems with a total panel capacity of no more than 100 kW may create STCs. The system owner usually assigns the right to create STCs to a Clean Energy Regulator (CER)-registered agent, which may apply the agreed certificate value as an upfront invoice discount. The current small-scale rules remain in force unless and until the proposed expansion is implemented.
STC value: STCs are traded on an open market but are capped at a regulated ceiling of $40 (excl. GST) through the CER’s STC Clearing House. In practice this translates to an indicative discount of roughly $200–$300 per kW installed, depending on postcode zone and the certificate price on the day.
| System size | Indicative STC discount* |
|---|---|
| 30 kW | ~$6,500–$8,300 |
| 50 kW | ~$11,000–$13,800 |
| 99 kW | ~$21,700–$27,400 |
Eligibility basics:
- Total solar panel capacity of no more than 100 kW and expected annual electricity output of less than 250 MWh
- Panels and inverters on the Clean Energy Council approved product lists; the system designed and installed by appropriately accredited Solar Accreditation Australia professionals; and applicable Australian Standards and scheme requirements met
- STCs must be created and claimed within 12 months of installation
Commercial solar incentives above 100 kW and no more than 1 MW
Scheme: Proposed mid-scale expansion of the SRES.
On 5 August 2026, Climate Change and Energy Minister Chris Bowen announced the government’s intention to expand SRES eligibility to qualifying solar PV systems above 100 kW and no more than 1 MW, with application intended for eligible installations from 1 October 2026, subject to the necessary regulations. Under current rules, an eligible system above 100 kW may seek accreditation under the Large-scale Renewable Energy Target and create Large-scale Generation Certificates from eligible metered generation.
How it works, if implemented as announced: Qualifying commercial, industrial and agricultural systems above 100 kW and no more than 1 MW would be eligible to create deemed STCs after an eligible installation, using the proposed fixed five-year deeming factor. The system owner may then assign the right to create the certificates to a registered agent in exchange for an agreed upfront invoice reduction.
Indicative value: Government estimates suggest the change could reduce upfront project costs by around 20%.
| System size | Indicative upfront STC discount* |
|---|---|
| 250 kW | ~$68,000 * |
| 500 kW | ~$136,000 |
| 850 kW | ~$230,000 * |
| 1 MW | ~$269,000 *(Zone 3, 2026 install); ranges from ~$231,000 in southern zones to ~$316,000 in northern zones (Zone 1) |
State-based commercial solar and battery rebates
In addition to federal certificate incentives, some states add their own incentives:
Victoria – VEU C&I solar discount
Victorian businesses may be eligible for commercial and industrial solar support through the Victorian Energy Upgrades program. The standard commercial and industrial solar activity applies to eligible non-residential premises installing solar PV systems between 30 kW and 200 kW. Projects larger than 200 kW may be assessed through the VEU project-based activity, subject to applicable rules, measurement requirements and approval processes.
The financial value is generally delivered through Victorian Energy Efficiency Certificates, known as VEECs. The VEEC value is not fixed and can change with market conditions and program requirements.
New South Wales – PDRS commercial battery incentives
From 1 September 2026, eligible NSW businesses may receive a battery incentive under the Peak Demand Reduction Scheme (PDRS). The NSW Government’s indicative support is approximately 20-30% of battery installation cost for a battery-only project and 30-40% when the battery is installed with qualifying new or additional solar. Eligible battery capacity ranges from 20 kWh to 30 MWh under the applicable BESS4 or BESS5 method; for larger BESS5 projects, the incentive calculation is capped at the first 10 MWh. For a combined project, new or additional solar must be at least 25% of battery capacity and installed within the applicable 90-day period. Customer, site, equipment, installer, planning and scheme requirements apply, and residential buildings, data centres and off-grid systems are excluded.
Read the full NSW C&I solar and battery incentive guide
Can commercial solar incentives be stacked?
In some cases, businesses may be able to access federal certificates and state-based incentives for different components of the same energy project. However, incentives should never be assumed to stack automatically. Ask your EPC or installer for a written incentive breakdown before signing a contract.
What is the average commercial solar payback period?
Commercial solar payback periods in Australia often fall within a broad range of approximately 3 to 7 years. The final result is driven less by the panel price than by how much solar electricity your business can use on site when it is generated.
Businesses with consistent daytime load, such as manufacturing facilities, warehouses, cold storage, retail, food processing, schools and offices, often have stronger solar economics because they can avoid buying more expensive grid electricity during operating hours.
Considering a 250 kW project has a gross cost of $250,000, receives $68,000 in certificate value under the proposed rules and delivers $50,000 per year in net operating cash savings after recurring costs, the net upfront investment is $182,000 and simple payback is 3.64 years.
Simple payback = net upfront investment / annual net operating cash savings
That example is illustrative only. A good commercial solar business case should also consider electricity tariffs, demand charges, export value, degradation, maintenance, financing, insurance and future changes to energy consumption.
A well-designed system should be assessed not only on simple payback, but also on lifetime energy yield, net present value and the certainty of its projected savings.
How to choose the right commercial solar system size for my business?
The right size depends on daytime electricity consumption, usable roof area, network conditions, export limits, budget and future energy demand.
- Analyse electricity use:
- Measure usable roof area: A broad planning guide is approximately 6–7 m² of usable roof area per kW, although requirements vary by module dimensions, layout, tilt, mounting and safety setbacks.
- Model generation: Account for orientation, tilt, shading, soiling, temperature, electrical losses and local weather. For larger projects, consider P50 and P90 scenarios.
- Confirm DNSP requirements: Export limits, connection conditions, protection settings and augmentation costs can change the optimal system design.
- Allow for future load: Consider electrification, EV charging, new shifts, production growth, refrigeration, tenant changes and potential battery storage.
Example: A warehouse using approximately 1,200 kWh per day, including around 800 kWh during daylight hours, may warrant a feasibility assessment, but those daily totals alone do not justify a 250-300 kW array. Preliminary DC capacity must be tested against the interval profile, site-specific yield, tariffs, roof layout, export constraints, curtailment, storage strategy and future load.
How do you choose a good commercial solar system?
A good commercial solar system is not necessarily the cheapest quote or the largest array that fits the roof. It is the system that generates electricity the business can use, reduces costs measurably and delivers a transparent, well-documented return.
- Design around load, not only roof area. Strong daytime demand generally increases the value of onsite solar consumption.
- Request bill-reduction modelling. A proposal should model self-consumption, tariffs, demand charges, export limits and annual dollar savings—not only annual generation.
- Assess solar as a long-term asset. Review generation assumptions, degradation, warranties, installation quality, monitoring and maintenance.
- Consider emissions and procurement value. Solar can support Scope 2 reporting, tenders, supply-chain requirements and internal decarbonisation goals.
How do I compare commercial solar panels?
Commercial solar modules should be evaluated on lifetime value, not just nameplate wattage or upfront price.
- Efficiency and power density: Higher-efficiency modules may allow more capacity to fit on a roof-constrained site.
- Temperature performance: A less-negative Pmax temperature coefficient generally means lower relative power loss as module temperature rises.
- Degradation and performance warranty: Confirm that the financial model uses the actual module’s warranty-backed degradation assumptions.
- Mechanical and environmental durability: Review mechanical-load rating, hail resistance, corrosion protection, fire classification and mounting compatibility.
- Warranty and local support: Review product and performance warranties, technical support, claims processes and responsibility for replacement labour and site access.
Why C&I owners, investors and EPCs choose AIKO
For commercial and industrial solar, module selection can influence installed capacity, lifetime energy yield, hot-weather performance, roof utilisation and long-term asset risk.
AIKO’s ABC (All Back Contact) technology is designed for high-efficiency generation and roof-constrained applications. Depending on the selected model, higher module efficiency can help a C&I project fit more capacity into the same available roof area.
More installed capacity on the same roof. AIKO ABC’s higher power density means more capacity fits into the same fixed roof footprint, module count and dimension than a comparable standard TOPCon design, in verified fixed-footprint modelling, approximately 6-10% higher installed capacity from the same roof area, without needing extra space.
More predictable lifetime returns. That additional capacity flows through to the financial case: in verified fixed-footprint modelling, the higher-capacity ABC system delivered a meaningfully higher 30-year revenue outcome, a shorter payback period and a higher IRR than the standard TOPCon comparator.
Designed for Australian commercial rooftops. AIKO ABC’s −0.26%/°C temperature coefficient helps limit output losses as modules heat up, and the range carries Class A fire classification and TÜV-certified hail resistance, relevant considerations for large commercial rooftops exposed to heat, weather and ongoing maintenance activity.
| Metric | AIKO ABC | Standard TOPCon |
| Module efficiency | Up to 25.5% | 21.5%-23.5% |
| Annual degradation | 0.35%/year; 90.60% retained output in year 30 | 0.40%/year; 88.85% retained output in year 30 |
| Temperature coefficient | −0.26%/°C | −0.29%/°C |
| Hot-spot temperature | Stabilises below 100°C | Can reach around 170°C |
| Fire safety | Anti-ignition certified; Fire Rating Class A (dual glass) | Fire Rating Class C |
| Hail resistance | 35-40 mm | 25 mm standard rating |
| Partial-shade output | Up to 30% higher | Baseline |
| Micro-crack resistance | Passed 230 kg/100 cm² trample test with no cracks | Cracked in comparison test |
Frequently asked questions
Is commercial solar worth it for Australian businesses?
It can be, particularly where a business has substantial daytime electricity use, suitable roof area, workable network conditions and a well-designed system. Financial outcomes depend on self-consumption, tariff structure, installed cost, incentives, export limits, financing and site conditions.
Can a business install more than 100 kW of solar in 2026?
Yes. Businesses can install systems above 100 kW under current arrangements. Depending on the project’s accreditation and timing, the system may use the LGC pathway. The proposed SRES expansion would allow qualifying systems above 100 kW and up to 1 MW to create upfront STCs from 1 October 2026, subject to regulations and final eligibility requirements.
Is the 1 MW commercial solar rebate confirmed?
No. The Government has announced its intention to expand SRES eligibility, but the change remains subject to regulations and final requirements. Until the regulations are made, it should be described as proposed or conditional rather than guaranteed.
Are STCs paid as cash?
Usually, the system owner assigns STCs to an installer, retailer or registered certificate agent. The certificate value is then applied as an upfront discount to the invoice. The contract should clearly identify the assumed value and who bears the risk if the claim is not approved.
How long does commercial solar take to pay back?
Payback varies significantly. Electricity use, tariffs, demand charges, system cost, incentives, export limits, roof complexity, financing and annual generation all affect the result. Request a project-specific model showing simple payback, IRR, NPV and sensitivity analysis.
Can commercial solar and battery incentives be combined?
Sometimes, but not automatically. Federal and state programs have separate eligibility rules. Confirm the exact position in writing with the installer, Accredited Certificate Provider or relevant program administrator before signing a contract.
Explore more from AIKO
- See the full AIKO C&I product range
- Read the NSW C&I solar and battery incentive guide
- View AIKO commercial solar applications across Australia
Planning a C&I solar project? Speak with our team to see how AIKO ABC modules could help maximise system capacity, rebate value and ROI for your project
Sources
- Clean Energy Regulator, Expansion of solar PV eligibility under the SRES (5 Aug 2026)
- DCCEEW / Minister Bowen, Putting more roofs to work (5 Aug 2026)
- pv magazine, Australia expands rooftop solar rebate scheme (5 Aug 2026)
- Solar Victoria, Commercial and industrial solar panel (PV) discount
- NSW Government, Batteries for Businesses Incentive
- CER, STC entitlement calculator (for confirming any STC figure before quoting a customer)