A. Abiri-Jahromi, A. Majzoobi†, A. Khodaei, L. Zhang, E. A. Paaso, S. Bahramirad, M. Lelic, and D. Flinn, “Battery Energy Storage Requirements for Mitigating PV Output Fluctuations,” IEEE PES Innovative Smart Grid Technologies Conference Europe, Sarajevo, Bosnia and Herzegovina, Oct. 2018.