Interoperability in the context of CER means that devices from different brands and service providers can communicate and operate together seamlessly. Interoperability, and especially BTM interoperability, is considered a foundational strategy to protect consumers from vendor lock-in (where a household or business is forced to continue using a single provider’s ecosystem, limiting choice, competition, and the ability to switch to better offers or services). More broadly, this contributes to consumer trust, market innovation, and the equitable distribution of benefits from Australia’s energy transition.

This article summarises government reviews that have explored how mandatory minimum standards can promote greater interoperability with a consumer protection lens, and current industry directions, as relevant to CER product developers positioning themselves for success in the Australian market for the medium to long-term. The knowledge base article CER Interoperability Standards outlines technical details associated with voluntary schemes and emerging requirements in the Australian market.

Key points

• Minimum standards are being considered to reduce vendor lock-in and support consumer choice.
• Reviews by the ESB and AEMC identified proprietary communications and inconsistent technical standards as barriers.
• The National CER Roadmap supports a nationally consistent approach to standards and consumer protections.
• Proposed AS 5438 would establish minimum interface requirements for inverter energy systems.
• Developers relying only on proprietary APIs may face future compatibility and market-access risks.

Relevant government reviews undertaken to date

The ESB’s Advice to Jurisdictions (2023, unpublished) identified that interoperability is foundational for consumer choice, competition, and power system security. It recommended that governments:

• Introduce national minimum interoperability requirements for a range of other high power, high cost CER
• Introduce national minimum requirements for EVSE conformance to OCPP and ISO 15118
• Agree national principles for minimum interoperability features for publicly funded charging infrastructure.

The AEMCs Review into Consumer Energy Resources Technical Standards (2023) also found that non-compliance with technical standards, proprietary communications, and lack of standardisation were creating barriers to consumer participation and increasing the risk of vendor lock-in.

Both the ESB and AEMC work called for jurisdictions to lead the creation of a new regulatory authority to set and enforceable standards to ensure interoperability across the lifecycle of CER devices.

Energy and Climate Change Ministerial Council

The ECMC, through the National Consumer Energy Resources Roadmap (2024) sets out actions to develop a nationally consistent approach to technical standards and consumer protections, recognising the role of interoperability in preventing vendor lock-in and supporting fair access to new energy services. A key focus is ensuring that consumers can combine products from different brands and switch providers without losing functionality or value.

Consultation papers and other policy development artifacts are available from this DCCEEW webpage. For example:

• Technical Standards for CER Interoperability Consultation Paper (2025): proposes mandatory technical standards for interoperability across a wide range of CER devices, including BESS, EVs, EVSE, electric water heaters, pool pumps, air-conditioners, smart appliances, and EMS. It calls for a shared framework that covers communication protocols, physical interface requirements, device compatibility, market rules, cybersecurity, and lifecycle maintenance.
• National Technical Regulatory Framework: focuses on regulatory frameworks to implement and enforce these standards. It highlights the need for clear regulatory design, mandatory accreditation, and minimum energy performance standards. The paper identifies gaps in current standards, especially for EMS and controllable loads, and stresses that ongoing stakeholder engagement is needed to keep standards fit-for-purpose as technology evolves.

Productivity Commission

The Productivity Commission’s National Competition Policy Analysis 2025 Interim Report highlighted the economic and consumer benefits of aligning Australian CER technical standards with international standards. For CER interoperability, the report found that bespoke, non-aligned standards can lead to vendor lock-in, limiting consumers’ ability to “mix and match” devices or switch providers, and reducing access to affordable, innovative energy technologies.

The Productivity Commission outlined potential reforms intended to support a more seamless national market for CER products and services, enabling interoperability and protecting consumers from being locked into proprietary ecosystems.

Current market developments in CER interoperability

Australia’s energy sector is still grappling with frameworks and coverage for minimum BTM interoperability standards. While government and industry initiatives have converged on the need for robust, enforceable standards to protect consumers and support market innovation, the method and scope of achieving this is unresolved in 2025.

A key development is the proposal for AS 5438, a new Australian standard designed to establish minimum interoperability requirements for inverter energy systems. While the standard is intended to apply only to inverters for the purposes of inverter control and telemetry, it also supports standardised interface requirements for EMS systems integrating with inverters. The proposed standard and its testing procedure is intended to align closely with clause 10 of IEEE 1547 requiring a physical communications interface (Ethernet or RS-485) and support for a recognised communications protocol. It specifies that the interface shall be available when the inverter is powered up (i.e. on an ongoing basis). Technical requirements are further explored in the knowledge base article CER Interoperability Standards.

DCCEEW is leading consultations on national minimum standards for device communication and control as well as the development of a national regulatory framework to give them effect. This work is expected to result in draft legislation being introduced into the federal parliament in 2026.

Overall, CER product developers relying on bespoke or proprietary APIs run the risk of limiting consumer choice, creating barriers to interoperability, and exposing their customers to vendor lock-in. As Australia moves towards mandatory minimum standards, such as the proposed AS 5438, developers who fail to adopt open, standardised interfaces may find their products incompatible with future regulatory requirements and market expectations. In an Australian market context, embracing interoperability is considered a positive market differentiator; it not only helps future proof customer investments but also supports the long-term competitiveness of the product in the Australian market.

Related articles

• Consumer protection frameworks
• National consumer protection reforms