Battery rebate eligibility: approved battery list, VPP-ready inverters, one per NMI and other rules

To get the federal battery discount, a home battery must be on the Clean Energy Council (CEC) approved battery list, be capable of joining a virtual power plant (VPP) if it is grid-connected, be 5–100 kWh nominal capacity, be new, be installed in a single job by a Solar Accreditation Australia (SAA) accredited installer with a battery endorsement, meet AS/NZS 5139:2019 and state electrical safety laws, and stay at the property until the end of 2030 or the end of its warranty, whichever is later. Only one battery per premises (one per NMI for grid-connected homes) can create STCs. If any condition fails, the certificates cannot be created and the discount on your quote disappears. Joining a VPP is optional under the federal rules; being VPP-capable is not.

These conditions are taken from the Clean Energy Regulator's (CER) solar batteries page (last updated 31 July 2026, checked 27 October 2026). For how much the discount is worth, see the STC factor guide and the 2026 rebate overview.

The conditions at a glance

The VPP-ready requirement explained

The CER's VPP page says all on-grid batteries, including their inverters, "must be capable of participating in a VPP at the time of installation to claim" STCs. Capability is a technical requirement; participation is your choice:

• You can join a VPP at installation, later, or never.
• Joining later may need upgrades, so ask whether the battery can join the VPPs available in your area without extra hardware.
• Taking part needs an ongoing internet connection and communication with a VPP operator.

Off-grid rules differ. Batteries at off-grid properties more than 1 km from the grid do not need to be VPP-capable. Off-grid properties within 1 km of the grid must be VPP-capable or provide written evidence that grid connection would cost more than $30,000. Off-grid batteries must be installed on a lived-in dwelling.

For what a VPP actually does, see virtual power plants explained.

Existing solar and inverters

You can add a battery to a new or existing solar system of up to 100 kW. The CER's rules for existing systems:

1. The existing solar system must meet state and territory electrical safety rules, but does not have to be on the current CEC list.
2. The existing inverter the battery connects to must be VPP-capable. Other inverters on site do not need to be.
3. If that inverter does not meet the requirements, it must be replaced with a CEC-listed, VPP-capable inverter.

This is the point where many "simple add-on" quotes grow. See adding a battery to existing solar.

One battery per NMI: the trap for second owners

Only one battery per premises can create STCs. For grid-connected homes the premises is identified by its National Metering Identifier (NMI), the number on your electricity bill. Retailers must check that no battery has already been claimed at the premises before quoting; a later battery at the same site is not STC-eligible.

Practical consequences:

• If you buy a house where a previous owner claimed a battery, you cannot claim a second discounted battery there.
• If your first battery fails outside warranty, a replacement is not eligible.
• Expanding an existing battery is treated differently: you can add at least 5 kWh, up to 100 kWh total nominal capacity, and for stackable systems only the new modules are claimed and the system is re-certified.

What the retailer must give you

The CER sets obligations for rooftop solar and battery retailers (page updated 18 September 2026). Before installation they must give you written information including the contract, installer and designer details, system performance limits, feed-in tariffs and export limits, payback or savings estimates and any conflicts of interest. They must size the battery for the premises' energy use and for the solar system, use SAA-accredited installers and CEC-listed products, and provide a signed written statement for each system. For batteries, that statement includes extra confirmations such as VPP capability.

Installers must take geotagged, timestamped photos of critical labelling; the CER warns that missing photos delay or block the STC claim. A retailer making three or more false or misleading statements in a three-year period can be declared ineligible to make written statements, and the CER publishes that list.

Checklist before you sign

• Battery model and inverter model written on the quote and found on the CEC lists
• Installer named, and found in SAA's lookup with a battery endorsement
• Written confirmation that the system is VPP-capable
• Confirmation that no battery has been claimed at your NMI
• Expected installation date (it sets the STC factor)
• Number of STCs and price per STC shown

The quote and contract checklist has the full list.

FAQ

Can I install a second-hand battery and get the discount?

No. The battery must be new, created within 12 months of the installation date, and not previously installed or claimed.

I moved house. Can I take my discounted battery with me?

The CER requires the battery to stay at the property until the end of 2030 or the end of its warranty, whichever is later. Moving it before then breaches the conditions.

Does my house need solar panels at all?

The CER's page describes batteries installed with a new or existing solar system. If you have no solar, ask the installer to confirm in writing how the battery will qualify before you sign.

Is there an income limit?

No income test appears in the CER's eligibility conditions. State incentives may have their own limits; see state incentives.

Sources

• Clean Energy Regulator — solar batteries eligibility, VPP page, retailer obligations
• Clean Energy Council — approved battery and inverter lists
• Solar Accreditation Australia — installer accreditation and battery endorsement lookup
• Standards Australia — AS/NZS 5139:2019 battery installation standard