DIN EN IEC 62909-1:2026-03

This part of IEC 62909 specifies general and safety aspects of bi-directional grid-connected power converters (GCPC), consisting of a grid-side inverter with two or more types of DC power ports on the application side with system voltages not exceeding 1 000 V AC or 1 500 V DC. This document can also be used for the special case of a multiple DC power port GCPC used in an application requiring only one DC power port. This document considers general aspects such as terminology, specifications, performance, system architecture, as well as safety requirements. This document does not cover - uninterruptible power supply (UPS) systems, which fall under the scope of the IEC 62040 series, - power conversion equipment for use in photovoltaic systems, which fall under the scope of the IEC 62109 series, and - bi-directional power converters to charge or discharge the batteries located within electric vehicles or in the charging station, which fall under the scope of the IEC 61851 series. In order to optimize energy consumption within a home energy management system, it is necessary to provide for the best combination of power generation with rechargeable energy storage devices such as electric vehicles and battery systems. Such optimization is achieved in part by ensuring efficient conversion between direct current and alternating current in order to supply the storage batteries. The IEC 62909 series of standards describe a bi-directional grid-connected power converter (GCPC) that is efficiently connected to energy generation sources and energy storage systems. This document contains general requirements and safety requirements, regardless of the specific features of individual applications.