c) limits of voltage fluctuations and flicker (IEC 61000-3-3 or IEC 61000-3-11); they should be repeated in 6 sessions (33%, 66% and 100 % of the PSMAX, or PNINV for integrated EESS, and to 33%, 66% and 100% of the PCMAX), for storage system connected to the bidirectional converters, and for the storage system connected to unidirectional converters, 3 sessions (33%, 66% and 100 % of the maximum power available discharged.)