Which Batteries Qualify for Cheaper Home Batteries in Australia

Key Takeaways

• Only one solar battery system is eligible for Small-scale Technology Certificates (STCs) per premises, ever.
• The battery and the inverter it connects to must be technically capable of participating in a Virtual Power Plant (VPP) if grid-connected.
• Installation must be performed by a Solar Accreditation Australia (SAA) accredited installer with battery endorsement.
• Moving an eligible battery from the property before its warranty ends or 2030 (whichever is later) will forfeit its eligibility.

Understanding Eligibility for the Australian Cheaper Home Batteries Program

To qualify for the Australian Cheaper Home Batteries program, your battery system must meet specific criteria set by the Clean Energy Regulator (CER). These requirements cover the battery itself, its connection to a solar PV system, installer accreditation, and even its location. Meeting these conditions is essential to receive the upfront discount offered through Small-scale Technology Certificates (STCs).

How the Cheaper Home Batteries Program Works

The Australian Cheaper Home Batteries program is a federal initiative designed to reduce the cost of installing eligible small-scale solar batteries for households and small businesses. It operates under the Small-scale Renewable Energy Scheme (SRES). Under this scheme, eligible systems can claim STCs, which registered agents can then use to offer an upfront discount on the purchase price of your system. The program aims to provide around a 30% discount on the upfront cost of installing solar batteries. CHOICE, a consumer advocate, notes that the program has offered "discounts of around 25% and in some cases, even more."

Detailed Eligibility Checklist

The Clean Energy Regulator outlines several conditions that your battery system, installation, and property must meet to be eligible for STCs.

General Requirements

• One System Per Premises: Only one solar battery system is eligible for STCs per premises. Additional solar batteries are not eligible for STCs after the first claim. If you own multiple properties, you can get separate discounts for each.
• New System: The battery must be new, created within 12 months of the installation date, and not previously installed or claimed.
• Installation Date: CHOICE states the system must be installed after 1 July 2025.

Battery System Requirements

• Paired with Solar PV: The battery must be installed with either a new or existing solar PV system of no more than 100 kW. The existing solar PV system doesn't need to be on the Clean Energy Council (CEC)'s approved product list, but it must comply with state and territory electrical safety regulations.
• Nominal Capacity: The battery system must have between 5–100 kWh nominal capacity. Nominal capacity is the maximum amount of energy a battery can store at full charge, typically found on the product label. For a group of batteries, each one must meet the 5 kWh minimum, with a combined capacity of no more than 100 kWh.
• Usable Capacity Cap: While the nominal capacity can be up to 100 kWh, STCs can only be claimed for the first 50 kWh of a solar battery's usable capacity. Usable capacity is the amount of energy that can be discharged and represents the power a home or business can draw. For example, a solar battery with a nominal capacity of 70 kWh and a usable capacity of 60 kWh may be eligible for STCs, but STCs can only be claimed for up to 50 kWh.
• Single Job Installation: The system must be installed in a single job, including for a group of batteries connected to operate as one unit.
• Approved Product List: The battery must be included on the Clean Energy Council (CEC) approved battery list.
• Standards Compliance: The system must be compliant with Australian and New Zealand standards (AS/NZS 5139:2019) and state or territory electrical safety laws.
• VPP Capability (Grid-connected): If your system is grid-connected, it must be technically capable of participating in a virtual power plant (VPP). This is a requirement even if you choose not to join a VPP. For more information on VPPs, see our guide on /au/guides/fixes/flexible-exports-south-australia-explained.

Inverter Requirements

• Connected Inverter: The inverter the battery is connected to must be VPP-capable. Other inverters on site (e.g., existing solar PV inverters) are not required to be VPP-capable.
• Existing Hybrid Inverters: If the battery connects to an existing VPP-capable hybrid inverter, that inverter must either be currently listed on the CEC's approved inverter list, or have been listed at the time the solar PV system was commissioned. It must not have been removed for being declared ineligible or delisted for safety reasons. If it does not meet these requirements, it must be replaced with one that is CEC-listed and VPP-capable.

Installer Requirements

• Accredited Installer: The system must be installed by a Solar Accreditation Australia (SAA) accredited installer with battery endorsement.
• Technical Requirements: Installation must be in accordance with SAA's technical requirements.

Off-Grid Systems

• Dwelling Requirement: An off-grid solar battery must be installed on a dwelling that is lived in, such as a remote farmhouse. Structures that are not lived in, such as sheds or bore pumps, are not eligible.
• Multiple Dwellings: Additional off-grid batteries may be claimed for other lived-in dwellings at the same location, such as a tiny home, granny flat, houseboat, or caravan.
• VPP Capability for Off-Grid: Properties more than 1 km from the grid do not need to be VPP-capable. Properties less than 1 km from the grid must either be VPP-capable, or have written evidence that the cost to connect the unit to the main grid is more than $30,000 (excluding extra costs to extend the connection). This written evidence must come from the Distribution Network Service Provider (DNSP) or another accredited service provider or equivalent.

Stackable Systems and Expanding Existing Systems

• New Modules Eligibility: New modules added to an existing stackable system are eligible only if the final configuration is on the CEC's approved product list at the date of certification, the SAA accredited installer re-certifies the ENTIRE system as safe and compliant, and the modules are compatible within manufacturer specifications.
• STC Claim for New Modules: STCs can only be claimed for new battery modules that are added, not for the pre-existing capacity.
• Fraud Warning: The CER explicitly states: "Claiming the whole capacity of the expanded battery system may be considered fraud or making false and misleading statements to the Commonwealth."
• Expanding Existing Battery Systems: Additional capacity can be added if the solar battery has not previously claimed STCs, and the additional nominal capacity is at least 5 kWh, with the total nominal capacity of the system not exceeding 100 kWh including pre-existing batteries.

Battery Location and Movement

• Property Retention: Once a battery is installed, it should remain at the property for the duration of the warranty period or the end of 2030, whichever is later. If you move a battery to another premises, it will no longer be eligible to claim STCs.

What you can check yourself, and what you cannot

As a homeowner, you can check if a battery model is on the Clean Energy Council's approved product list and verify if your chosen installer is accredited by Solar Accreditation Australia with battery endorsement. You can also confirm the nominal and usable capacity of the battery you are considering.

However, determining if an existing solar PV system complies with all state and territory electrical safety regulations, or if an inverter meets VPP capability requirements, often requires the expertise of an accredited installer. They are responsible for ensuring the entire system, including any new modules in a stackable system, is safe and compliant with all relevant standards and technical requirements. Changing inverter settings yourself is not recommended, as grid-protection settings are set by an accredited installer and changing them can breach your connection agreement.

What the published sources do not tell you

While the Clean Energy Regulator provides comprehensive eligibility criteria, some details are not fully specified. The exact STC spot price, which determines the final dollar value of the rebate, is not provided and fluctuates with market conditions. The full lists of SAA's technical requirements or the CEC's approved battery products are referenced but not directly included in the public guidance. Specific state or territory electrical safety laws are also not detailed, requiring homeowners to consult local regulations.

Additionally, while the CER advises checking if state and territory battery programs can stack with the federal STC program, it notes that some programs may not be eligible if you are claiming STCs under the SRES. CHOICE suggests that "you can apply for both discounts together, plus applicable state or territory incentives, to really supercharge your savings," but this should be verified for your specific state and chosen program.