The report focuses on organizational structures for the renewable energy era power system. It is published by IRENA and is freely available for use, sharing, copying, reproduction, printing, and storage, as long as appropriate acknowledgement is given to IRENA as the source and copyright holder. The report was authored by Xavier Garcia Casals and Emanuele Bianco under the guidance of Rabia Ferroukhi (IRENA), and valuable input was provided by Christopher Martell, David Nelson, Donna Peng, Cajeme Villarreal, Sara Pizzinato, and Rafael De Sá Ferreira. The report is edited by Steven Kennedy and is available for download at www.irena.org/publications. For further information or to provide feedback, contact info@irena.org.