In the industrial dialogue held on 23 Aug, it was explained that only 50% of the maximum capacity of the solar power plant will be exported to grid and the rest will be used to charge battery. Is this mechanism still valid under CRESS Guideline?

Yes. Main function of BESS is to firm up GEP output to 50% of its capacity by storing solar energy in access of 50%. Meaning that all solar energy will be exported to grid. Depending on weather condition and solar irradiance on a particular day, and if there is solar output more than 50% of GEP capacity, only the energy in excess of this 50% of GEP capacity will be stored in BESS and discharged later to grid on the same day.

What is the Minimum Capacity Factor (CF) for Battery? What is the Minimum Capacity Factor (CF) for Battery? If we declare the firm capacity for the next day, how long the plant need to maintain the firm capacity (i.e 6 hour, 12 hours etc?) Is a RED permitted to sign FCAS (Frequency Control Ancillary Services) agreements with the grid operator for a qualifying BESS system developed within a solar farm, as well as for standalone projects? If we declare the firm capacity for the next day, how long the plant need to maintain the firm capacity (i.e 6 hour, 12 hours etc?)

Battery and Capacity Requirements