This part of the IEC 62257 series introduces the entire series regarding off-gridrenewable energy and hybrid products and systems most commonly used for rural applications and access to electricity.

This Part 100 document provides a guide for facilitating the reading and the use of the IEC 62257 series for setting up off-grid electrification in developing countries or in developed countries, the only difference being the level of service and the needed quantity of energy that the customer can afford.

This Part 100 document introduces the series. It focuses on the planned document organization and numbering structure, including a description of each topic and subtopic grouping. It contains a brief overview of the project management and tendering process. It also contains a brief overview of the concept of “access to electricity” and some of the types of renewable energyoff-grid and hybrid systems. This document has several examples of case studies for various user groups, to assist them in utilizing the updated series. Additionally, it contains an informative Annex A to assist users of prior versions of the IEC 62257‑x series in locating content within the updated IEC 62257‑xxx series.

This document outlines the organization of documents within the updated IEC 62257‑xxx series published in 2022 and later, including utilization of a new 3-digit part numbering scheme, grouped into topics and subtopics.

This series is anticipated to be of interest to the following renewable energyoff-grid and hybrid system stakeholders:

The document part numbers to be assigned within this updated IEC 62257‑xxx series will be grouped into topics as follows:

To assist users in navigating the documents within the revised IEC 62257 series, this introductory -100 document presents how the documents will be further organized into the following subtopics, see .

Refer to the website address www.iec.ch for a list of published documents.