IEC 63445:2025 applies to system referencing conductor switching device (SRCSD) for household and similar uses within a Prosumer’s electrical installations (PEI).
The SRCSD provides functions as described in IEC 60364-8-82:2022 [2], 82.8.2.2.4.
PEI intended for operating by either being connected to a distribution network or disconnected from the distribution network is an islandable PEI.
Intentional disconnection from and connection to the distribution network relies on the local earthing system being switched by the SRCSD. In addition, unintentional loss of distribution network is covered.
The SRCSD is a single pole device intended to connect one live conductor of the power system to an earthing arrangement.

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IEC 63402-1:2025 specifies general requirements and the architecture between the Point of Common Coupling (PCC) and smart devices (SD) operating within the Smart Grid premises-side system (i.e. residential or commercial but not industrial premises).
This document does not include requirements for:
- safety
- electromagnetic compatibility (EMC);
- data security, as it is assumed that the underlying protocols will take the data security aspect into account
- special equipment (e.g. legacy heat pumps) with a direct physical connection to the grid, as such equipment bypasses the customer energy manager (CEM) and is not HBES/BACS enabled (covered by other standards than the IEC 63402 series).
This group EE publication is primarily intended to be used as an EE standard for the products mentioned in the scope, but is also intended to be used by TCs in the preparation of publications for products which are included in the boundary mentioned in the scope of this document.
It has the status of a group energy efficiency publication in accordance with IEC Guide 118.

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IEC 63345:2023 specifies a data model to abstract the metering world towards a simple external consumer display. The data model, as described by means of functional blocks contained in this document, lays down the format of metering data accessible by a simple external consumer display. This data interface would be typically part of the meter communication functions and be accessed by a simple external consumer display via the H1 interface of CEN/CLC/ETSI TR 50572 between the display and the meter communication functions.

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IEC 62991:2022 applies to source switching equipment, hereafter referred to as SSE, for household and similar uses, primarily intended to be used for energy efficiency (EE) purposes with local production and/or storage of energy.
SSE is intended to be installed in low voltage prosumer electrical installations (PEI) to deliver the electrical energy:
either to current-using equipment (direct feeding mode or island mode);
or to the grid (reverse feeding mode).

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IEC 62962:2019 The purpose of this document is to provide requirements for equipment to be used in energy efficiency systems. This document covers load-shedding equipment (LSE).
Guidelines relating to safety for LSE as given in IEC Guide 110 have been followed.
This document applies to load-shedding equipment for household and similar uses. The load-shedding function is used in energy management systems to optimize the overall use of electrical energy including production and storage. Load-shedding can be used for example for energy efficiency purposes as per IEC 60364-8-1:2019.

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Frequently Asked Questions

SC 23K is a Technical Committee within the International Electrotechnical Commission (IEC). It is named "Electrical Energy Efficiency products" and is responsible for: To prepare and to update standards for Energy Efficiency products, devices and solutions used within an efficient Management system of Electrical Energy in existing or new electrical installation which includes loads and/or local production and storage. These products provide functions including monitoring, measuring, controlling, managing and optimizing the overall efficiency use of AC or DC electrical energy for household and similar. The work also includes equipment intended to improve electrical energy performance, energy supply, procurement practices for energy using equipment and systems, and energy use as well as measurement of current electrical energy usage. The work addresses the requirements and testing procedures for electrical energy efficiency products or combinations of products, devices, and solutions whose purpose is to monitor, to manage and to optimize the energy use of electricity within an electrical installation supplying energy to loads, either from the grid or from local energy production and/or storage. The work does not cover requirements and testing procedures already covered by existing standards published in TC 23 and its SCs. Functional safety aspects are part of TC72. Note: For example, if a switch or a circuit breaker covered by an IEC published standard from TC 23 or its SCs includes any function dealing with energy efficiency management (e.g. measurement, features for load shedding, transfer switch etc.) SC 23K will refer to these existing standards within a global system approach This committee has published 5 standards.

SC 23K develops IEC standards in the area of Information technology. The scope of work includes: To prepare and to update standards for Energy Efficiency products, devices and solutions used within an efficient Management system of Electrical Energy in existing or new electrical installation which includes loads and/or local production and storage. These products provide functions including monitoring, measuring, controlling, managing and optimizing the overall efficiency use of AC or DC electrical energy for household and similar. The work also includes equipment intended to improve electrical energy performance, energy supply, procurement practices for energy using equipment and systems, and energy use as well as measurement of current electrical energy usage. The work addresses the requirements and testing procedures for electrical energy efficiency products or combinations of products, devices, and solutions whose purpose is to monitor, to manage and to optimize the energy use of electricity within an electrical installation supplying energy to loads, either from the grid or from local energy production and/or storage. The work does not cover requirements and testing procedures already covered by existing standards published in TC 23 and its SCs. Functional safety aspects are part of TC72. Note: For example, if a switch or a circuit breaker covered by an IEC published standard from TC 23 or its SCs includes any function dealing with energy efficiency management (e.g. measurement, features for load shedding, transfer switch etc.) SC 23K will refer to these existing standards within a global system approach Currently, there are 5 published standards from this technical committee.

The International Electrotechnical Commission (IEC) is the world's leading organization for the preparation and publication of international standards for electrical, electronic, and related technologies. Founded in 1906, the IEC provides a global platform for companies, industries, and governments to meet, discuss, and develop the international standards they require.

A Technical Committee (TC) in IEC is a group of experts responsible for developing international standards in a specific technical area. TCs are composed of national member body delegates and work through consensus to create standards that meet global industry needs. Each TC may have subcommittees (SCs) and working groups (WGs) for specialized topics.