ETSI TR 103 229规定了一种用于家庭或公共场所供电的安全超低压直流电源装置 区域（商店、酒店、火车站等）任何配备直流输入的ICT设备或任何配备直流输入的ICT适配器 符合EN 300 132-3-1[i.17]的要求。它提供了以下信息:具有多个输出或直流网络和供电区域（房间、区域）的架构；输入输出电压接口；接口电压的配置；通过在同一直流电源系统上共享多个设备来优化效率和成本；使用EN 300 132-3-1[i.17]中定义的高达400 VDC的电源接口与未来建筑的兼容性；综合停电管理，尽可能节约能源；可靠性电磁兼容性和抗干扰性；电力自主性，在发生危机（电网故障、气候危机、， 地震等）；使用可再生能源的可能性，尤其是在没有电网或电网质量差的新兴国家: 哪个输入界面，以及如何进行大小调整？为ICT以外的设备供电的可能性，如低功率灯，可大大提高生活质量和安全性 可持续发展；关于产品安全的一些信息；生态设计原则，评估材料使用、能源和二氧化碳排放的质量收益。本文件还概述了该领域的其他现有标准。发电机和电源转换器或控制器的详细说明不在范围内。

ETSI TR 103 229 specifies a Safety Extra Low Voltage DC power supply unit for powering at home or in public area (stores, hotels, railway stations, etc.) any ICT devices equipped with DC input or any ICT adapter with DC input compliant with EN 300 132-3-1 [i.17].It gives information on:architecture with multi-outputs or DC network and powering area (room, zone);input and output voltage interface;configuration of interface voltage;optimization of efficiency and cost by mutualising several devices on the same DC power system;compatibility with future building using the up to 400 VDC power interface defined in EN 300 132-3-1 [i.17];integrated power shutdown management, to save energy as much as possible;reliability;EMC and resistibility;power autonomy to enable standalone power of ICT in case of crisis (electric grid failure, climatic crisis, earthquake, etc.);possibility to use renewable energy especially in emerging countries with no grid or of poor quality grid: which input interface, and how to make the sizing?possibility to power devices other than ICT such as low power light which highly increases life quality and sustainable development;some information on product safety;ecodesign principles with assessment of gains in mass of material use, energy and CO2 emission.The present document also gives an overview of other existing standards in the field.The detailed description of power generators and power converters or controllers are out of the scope.