IEC 63402-2-2:2026 addresses the data model and messaging layer of customer energy management. Published in August 2026, it defines how a customer energy manager exchanges structured information with resource managers inside a premises. The pages below summarise its scope, the product context it applies to, and how conformity work is typically organised around a semantic interface standard of this kind.
Standard Information
This part of IEC 63402 establishes the semantic layer of the S2 interface: a technology independent set of data models and interaction patterns for energy management applications within the premises. It concerns the exchange of information between the customer energy manager (CEM) and the resource managers, and deliberately excludes concrete encodings, transport protocols and security provisions. - Designation: IEC 63402-2-2:2026
- Full title: Energy efficiency - Customer energy management system - Part 2-2: Data model and messaging - Interface between the customer energy manager and resource managers
- Status: Current
- Publication date: 2026-08-25
- ICS classification: 29, 29.020
- Technical committee: TC 23/SC 23K
Scope and Application
The document specifies the fundamental aspects of semantic interoperability for the S2 interface and the related data exchange between a CEM and the resource managers located within the premises. Its data models and interaction patterns are technology independent, meaning they describe what information must be conveyed and in which conversational structure, rather than how the information is encoded on the wire. Applications that benefit from this specification are energy management functions inside a building or site: coordinating flexible loads, generation or storage resources through a common vocabulary between the central manager and the individual resource managers. Because the models are abstract, implementers remain free to choose their own software platforms and system architectures. Three exclusions bound the scope. The standard does not define mappings to concrete data representations such as XML or JSON. It does not define mappings to application protocols for message passing. Security related aspects are likewise outside its coverage and must be handled elsewhere.
Products and Materials Covered
The product families within scope are the functional entities of a customer energy management system: the customer energy manager itself and the resource managers that represent individual energy resources within the premises. The standard treats these as software and communication roles rather than as physical appliances, so conformity attaches to the interface behaviour and data semantics of products implementing those roles. Under the ICS classification 29.020, electrical engineering in general, the specification belongs to the broad domain of electrical energy technology. Products concerned include controller platforms, energy gateway devices and embedded manager software whose function is to exchange energy management information across the S2 interface. Beyond direct product use, the document is intended as a reference for other technical committees preparing publications for products that fall inside the boundary described in its scope. This dual role — product standard and horizontal reference — shapes how the data models are written and interpreted.
Testing and Compliance Considerations
Verifying conformity with a semantic interface standard typically begins with a documentation review. The laboratory examines the manufacturer's interface description, data model usage and interaction pattern declarations against the clauses of the specification, confirming that each required information element and dialogue is represented without proprietary deviation.
Functional interface testing follows. An implementation under test is connected to a reference counterpart, and the declared data models and interaction patterns are exercised to confirm that messages carry the semantics the standard requires. Because the document excludes concrete encodings, transport protocols and security, test programmes normally reference separate specifications for those layers; the conformity scope for this part is the semantic behaviour itself.
Retest triggers include firmware updates that alter interface behaviour, new resource types added to the data model vocabulary, and revisions of the standard. Reports should state precisely which interface version was evaluated, since interoperability claims depend on a matching semantic baseline. Where disputes arise over interoperability failures, recorded message exchanges and the vendor documentation form the primary evidence.
Related Standards and Series Context
The designation itself conveys the structure of the work. IEC 63402 identifies the series covering customer energy management systems; the -2-2 part numbering indicates a subdivision of Part 2, which addresses data model and messaging, with this part focusing on the interface between the customer energy manager and the resource managers. The colon followed by 2026 marks the publication year of this edition under the IEC numbering convention. The document originates from technical committee TC 23/SC 23K, a subcommittee of IEC TC 23, responsible for this area of electrical accessories and energy management standardisation. Its classification under ICS 29.020 places it alongside general electrical engineering publications rather than product-specific safety or performance standards.
Readers requiring the authoritative text of the specification, including exact clause wording and normative references, should obtain the document through the official IEC channels; this overview is interpretive and does not replace the standard itself.
Frequently Asked Questions
What
factors affect the cost of IEC 63402-2-2:2026 energy efficiency testing?
Costs depend mainly on the products and materials covered, the scope of testing required under the standard's energy efficiency measurement methods, and any additional compliance considerations such as repeated measurements or extended reporting needs identified during evaluation.
If test results under IEC 63402-2-2:2026 are disputed, is retesting required?
Retesting and data dispute handling fall under the testing and compliance considerations of the standard. If results are challenged, the parties typically review the original measurement procedures, and retesting may be arranged to verify the energy efficiency data in line with the standard's requirements.
How long does IEC 63402-2-2:2026 energy efficiency testing take, and how are reports delivered?
Turnaround time varies with the product type, the extent of the energy efficiency measurements required, and laboratory scheduling under the standard's testing and compliance considerations. Once complete, the report documenting conformity is delivered to the client, though specific durations depend on the scope agreed with the testing laboratory.