Australia's main nationwide rooftop solar incentive is the Small-scale Renewable Energy Scheme. Eligible systems create small-scale technology certificates, or STCs. Most homeowners assign the certificates to a registered agent in exchange for an upfront discount shown in the quote.
It is commonly called the federal solar rebate, but it is not one fixed government cheque. Certificate entitlement and market value determine the reduction.
What creates an STC entitlement?
Eligible small generation units include qualifying solar PV systems installed under scheme rules. Entitlement considers system capacity, geographic zone, installation date, and deeming period.
The scheme runs toward 2030, so the deeming period reduces over time. The same eligible system installed in a later year generally creates fewer certificates than it would have earlier, all else equal.
Use the Clean Energy Regulator's current calculator and guidance rather than an old rebate table.
Assignment for an upfront discount
Creating and selling certificates independently involves registration, evidence, validation, and market sale. Most households sign an assignment form transferring the right to a registered agent.
The agent or retailer reflects an agreed value as a discount. Check:
- Number of certificates.
- Value allowed per certificate.
- Agent or administration fees.
- Gross system price.
- Final amount payable.
- What happens if the claim is rejected.
Do not sign a blank assignment form.
Approved products
Scheme eligibility requires compliant equipment under current rules. Confirm panels and inverters appear on the applicable approved lists at the relevant date.
A product's presence on a list does not guarantee it is the best choice or that the installation is high quality. It establishes a scheme and standards threshold.
Save model numbers, serial records, datasheets, warranties, and the list evidence used.
Accredited and licensed installation
Solar PV work must satisfy scheme accreditation requirements plus state or territory electrical licensing and safety law. Accreditation and licence are separate credentials.
Verify the person responsible for design and installation, not only the sales company. Confirm subcontracting and who supplies the electrical compliance certificate.
Non-compliant work can affect safety, network approval, warranty, and STC eligibility.
Installation evidence
The registered agent must collect required declarations, system details, photos, certificates, and assignment evidence. Scheme evidence requirements change as compliance controls evolve.
Cooperate with legitimate documentation but protect personal information. Ask why each item is needed, who stores it, and how it is submitted.
Keep the final invoice and electrical compliance record.
New installations versus upgrades
Rules for replacement, expansion, and additional capacity can differ from a first installation. An upgrade does not automatically create certificates for every component or the full combined system.
Ask the registered agent to identify the eligible new capacity and relevant rule. Do not rely on the total array size alone.
Network approval and inverter limits also apply separately.
STC value can change
Certificates are traded, so their value is not permanently fixed. Retailers may offer different assignment values or build certificate assumptions into package prices.
Compare final cash prices and scope rather than choosing the quote with the largest stated “rebate.” A larger discount attached to a higher gross price may not be better.
State and territory support
Additional programs may include rebates, interest-free loans, battery incentives, low-income upgrades, rentals, VPP participation, or local schemes.
Victoria maintains the Solar Homes Program under current eligibility. NSW introduced Home Energy Saver finance and maintains a VPP incentive. Other states may rely mainly on federal STCs and retailer or network programs.
Use the Australia State Solar Rebates Hub and verify through the administering government.
Batteries now use STCs too
Eligible batteries have been included in the SRES since 1 July 2025 under the Cheaper Home Batteries Program. Battery certificate calculations changed from 1 May 2026 to a tiered structure.
Battery rules, eligible capacity, approved products, installation evidence, and earlier-system treatment differ from rooftop solar PV. Use Australia Solar Battery Rebate Guide.
Consumer warning signs
Pause when a seller:
- Calls the discount a guaranteed cash payment from government.
- Refuses to show gross price and STC assignment separately.
- Uses expired certificate calculations.
- Cannot identify the registered agent.
- Requests a blank or incomplete assignment.
- Substitutes unapproved equipment after contract.
- Claims accreditation without identifying the installer.
- Pressures immediate signing because the rebate “ends tonight.”
Verification checklist
Before signing:
- Check current CER rules.
- Confirm equipment eligibility.
- Verify accreditation and electrical licensing.
- Review network connection requirements.
- Confirm STC quantity and assignment value.
- Compare gross and final cash price.
- Read rejection and substitution terms.
- Keep assignment and compliance documents.
Treat STCs as one project input
STCs reduce eligible upfront cost, but they do not make a weak system good. Roof suitability, production, equipment, network limits, retailer stability, installation quality, and tariff savings still determine value.
Continue through Australia Solar Panel Cost and STCs and the Australia Home Solar Hub.