Are you looking to reduce the cost of your rooftop solar panel installation, upgrading your property with energy-efficient home appliances (solar hot water systems, heat pump water heaters etc.) and maximize your renewable energy investment? The STC Rebate (Small-scale Technology Certificates Rebate) is a game-changing Federal Government solar incentive in Australia that makes it easier than ever to embrace solar power. In this comprehensive guide, we’ll dive into what is the stc rebate, how the stc rebate works, solar zones in Australia, stc rebate calculation, stc rebate benefits, and everything you need to know about Small-scale Technology Certificates rebate in Australia in 2026.

What is the STC Rebate?

The STC Rebate is the financial benefit available through Australia’s Small-scale Renewable Energy Scheme (SRES). Eligible systems create Small-scale Technology Certificates (STCs), which are usually assigned to a retailer or registered agent for an upfront discount.

Eligible technologies include solar PV, solar batteries, wind, hydro, solar water heaters and air source heat pumps.

For rooftop solar, the current limit is generally 100kW with annual output below 250MWh. Eligible batteries must have 5–100kWh nominal capacity, with STCs available on the first 50kWh of usable capacity.

2026 Solar PV Update

The Government has announced plans to extend SRES eligibility to certain solar systems above 100kW and up to 1MW from 1 October 2026, subject to the required regulations taking effect.

How Does the STC Rebate Work?

The STC Rebate works through a certificate-based system rather than a direct government cash payment.

For rooftop solar, the number of STCs mainly depends on:

• System size: The rated capacity of the solar PV system
• Solar zone: The zone rating for the installation postcode
• Installation year: This determines the applicable deeming period

Solar PV systems installed in 2026 use a 5-year deeming period. Solar batteries are calculated differently. Battery STCs are based on usable capacity, the applicable STC factor and the capacity tier that applies. System owners can create and sell STCs themselves or assign the right to a registered agent. Most customers choose the second option and receive the value as an upfront discount on their installation.

Understanding Solar Zones in Australia

Australia is divided into Four Solar Zones based on solar radiation intensity, which determine the number of STCs (Small-scale Technology Certificates) that can be claimed for a solar panel system installation. These zones are based on the amount of solar radiation (PV) received in different regions:

1. Zone 1 (Most Sunlight): Includes regions in northern Australia, such as Darwin and parts of Queensland. Solar systems in this zone generate the most STCs due to higher solar radiation levels.
2. Zone 2 (Moderate) : Covers areas like Brisbane and Perth, where solar output is still high, but slightly lower than Zone 1.
3. Zone 3 (Average Sunlight) : Includes ACT, Sydney, Adelaide, and Melbourne, where solar radiation is moderate.
4. Zone 4 (Least Sunlight): Covers southern parts of Australia, such as Tasmania, where the number of STCs  (Small-scale Technology Certificates) generated is the lowest due to reduced sunlight.

How to Calculate STCs Rebate?

For rooftop solar, the STC calculator uses three main factors:

1. System Size (kW): The total rated capacity of the solar PV system.
2. Solar Zone: The zone rating that applies to the installation postcode.
3. Installation Year: This determines the applicable deeming period.

Solar PV systems installed in 2026 use a 5-year deeming period. After the number of certificates is calculated, the estimated financial value can be worked out using the value received for each STC.

The STC Clearing House price is fixed at $40 per certificate excluding GST. Open-market STC prices can vary with supply and demand, so the actual value offered by a retailer or registered agent may be different.

Small-Scale Technology Certificates (STCs) Calculation and STC Rebates Calculation Formula

Choosing a solar system based on your zone is crucial, as it directly impacts the rebate amount. STC’s (Small-scale Technology Certificates) Solar rebate for popular solar panel installation packaged in 2026 and Government Deeming Period 2030 . 

Solar Zone 1 — Rating 1.622

Solar Zone 2 — Rating 1.536

Solar Zone 3 — Rating 1.382

Solar Zone 4 — Rating 1.185

Note: These examples use the 2026 five-year deeming period and an illustrative value of $40 per STC. Actual open-market STC values and retailer discounts may vary.

How Much Can You Save With the STC Rebate in Australia In 2026?

The value of the STC Rebate depends on your solar system size, installation postcode, installation year and the value received for each certificate. Using the official four solar zone ratings, the 2026 five-year deeming period and an illustrative value of $40 per STC:

Solar Battery STC Rebate in 2026

Eligible solar batteries have qualified for STCs under the Small-scale Renewable Energy Scheme since 1 July 2025. To qualify, a battery generally must:

• have 5–100kWh nominal capacity
• be installed with an eligible solar PV system
• use an approved battery
• be installed by an appropriately accredited SAA installer
• meet current technical and VPP requirements

STCs are available on the first 50kWh of usable capacity. For installations from 1 May to 31 December 2026, the base factor is 6.8 per kWh, with support applied at:

• 100% for the first 14kWh
• 60% from 14–28kWh
• 15% from 28–50kWh

For example, a 10kWh usable battery = 68 STCs. The final discount depends on the STC value and retailer or registered-agent arrangement.

How to Get Started with STC Rebate in Australia

If you’re considering solar panel installation in Australia, follow these steps to take full advantage of the STC Rebate in 2026. The application process for the STC (Small-scale Technology Certificate) Rebate involves several key steps to ensure you receive the financial benefit from solar system installation. Here’s what you need to do:

1. Check Eligibility

Make sure your solar or battery system meets current Small-scale Renewable Energy Scheme requirements, including system size, approved products and technical standards.

2. Choose Approved Products and an Accredited Installer

Use eligible solar panels, inverters or batteries and an appropriately accredited Solar Accreditation Australia (SAA) installer where required.

3. Estimate Your STCs

Use the official STC calculator to estimate your certificate entitlement. Solar PV uses system size, postcode and installation year, while battery STCs depend on usable capacity and the applicable battery factor.

4. Choose How to Receive the Benefit

Most customers assign their STCs to a retailer or registered agent for an upfront discount. You can also create and trade them yourself through the REC Registry.

5. Keep the Required Documents

Keep relevant invoices, compliance records, product details, serial numbers and installer documentation for the STC claim.

6. Create the STCs

STCs generally need to be created within 12 months of installation. If you assign them to a registered agent, they usually manage the process for you.

Benefits of the STC Rebate for Solar Panel Installation In 2026

Investing in solar energy with the help of the STC Rebate comes with a host of benefits:

• Lower Upfront Cost: The certificate value can reduce the initial cost of an eligible solar or battery installation.
• Immediate Benefit: Most customers receive the STC value directly through their quote rather than waiting for a later payment.
• Nationwide Availability: The SRES operates across Australia.
• Improved Solar Economics: Reducing the purchase price can shorten the time it takes for electricity savings to recover the upfront investment.
• Support for Renewable Energy: The scheme encourages households and businesses to install eligible renewable energy technologies.
• Can Work With Other Solar Incentives: Some eligible state or territory programs may be available alongside the federal STC benefit.

Can the STC Rebate Be Combined With Other Solar Incentives?

In some cases, the federal STC Rebate can be used alongside eligible state, territory or local Solar Incentives. Depending on where you live, additional support may include solar grants, battery rebates, finance programs or other energy incentives.

However, each program has its own eligibility requirements. Some incentives can be combined with STCs, while others may have restrictions. Always check the current rules for your state or territory before including multiple incentives in the same solar or battery quote.

Other Financial Benefits of Solar

The Solar Rebate is only one part of the potential financial benefit of installing rooftop solar. A well-sized solar system can reduce the amount of electricity you need to buy from the grid by allowing you to use more of your own solar energy.

You may also receive a feed-in tariff for eligible excess electricity exported to the grid. Rates vary between states, electricity networks and retailers, so current plans should be compared when estimating long-term savings.

For businesses, solar and battery systems may also have tax implications or potential deductions depending on individual circumstances. Tax treatment should be confirmed with a qualified tax professional.

Frequently Asked Questions (FAQs)

What is the STC Rebate?

The STC Rebate is the financial benefit created when an eligible renewable energy system generates Small-scale Technology Certificates under Australia’s Small-scale Renewable Energy Scheme. Most customers receive the value as an upfront discount.

How many STCs does a 6.6kW solar system receive in 2026?

A 6.6kW solar system installed in Zone 3 generates approximately 45 STCs in 2026. The exact result depends on the installation postcode, system size and applicable deeming period.

Is each STC worth $40?

Not necessarily. The STC Clearing House price is fixed at $40 per certificate excluding GST, while open-market prices can change according to supply and demand. The STC value used in a solar quote may therefore differ.

Can solar batteries receive the STC Rebate in 2026?

Yes. Eligible solar batteries with 5–100kWh nominal capacity may receive STCs, with claims limited to the first 50kWh of usable capacity. For installations from May to December 2026, the base factor is 6.8, with support tapering above 14kWh and 28kWh.

Do I need to create and sell STCs myself?

No. Most customers assign the right to create their STCs to a registered agent or retailer and receive an upfront discount. You can also create and trade certificates yourself through the REC Registry if you meet the scheme requirements.

In Summary 

The STC Rebate remains one of Australia’s main federal Solar Incentives for lowering the upfront cost of eligible renewable energy systems. For rooftop solar installed in 2026, the deeming period is 5 years, which means fewer STCs are available than in earlier years as the scheme moves towards its scheduled end in 2030.

Eligible solar batteries are also supported under the SRES. From May to December 2026, the battery base factor is 6.8, with support progressively reduced for usable capacity above 14kWh and 28kWh. Before choosing a system, check current eligibility requirements, use approved products, work with appropriately accredited installers and confirm how the STC value has been applied to your quote.

Aussie Solar Tech can help you choose an eligible solar or battery system and understand the STC discount available for your installation.