IEC 62282-4-102:2022 is available as IEC 62282-4-102:2022 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 62282-4-102:2022 specifies the performance test methods of fuel cell power systems for propulsion and auxiliary power units (APU). This document covers fuel cell power systems for propulsion other than those for road vehicles. This document applies to gaseous hydrogen-fuelled fuel cell power systems and direct methanol fuel cell power systems for electrically powered industrial trucks. The following fuels are considered within the scope of this document: - gaseous hydrogen, and - methanol. This document covers the fuel cell power system as defined in 3.7 and Figure 1. This document applies to DC type fuel cell power systems, with a rated output voltage not exceeding DC 150 V for indoor and outdoor use. This document covers fuel cell power systems whose fuel source container is permanently attached to either the industrial truck or the fuel cell power system. This second edition cancels and replaces the first edition published in 2017. This edition includes the following significant technical changes with respect to the previous edition: a. alignment of the Scope with the second edition of IEC 62282-4-101:2022; b. deletion of terms and definitions (previous entries 3.5, 3.10, and 3.15); c. addition of new terms in Clause 3: "delivered power" (3.13) and "regenerated power" (3.14); d. revision of symbols and their meanings in alignment with those of IEC 62282-3-201; e. replacement of "reference conditions" with "standard conditions" as seen in Clause 5; f. revision of the test method for the accessory load voltage spike test (13.3.2); g. addition of clarifications in Clause 14 (Power stability under operation); h. addition of a checklist for performance criteria dealt with in this document (Annex C).