CRESS
For the case 50MW/200MWh above, do we need to meet the requirement every day over the PPA term, that every day the plant shall have the capability to inject 200MWh energy to the grid system directly from BESS, even on bad weather days, when the PV system
No. The main function of BESS is to firm GEP output to 50% of its capacity, where solar energy in excess of 50% of GEP capacity will be stored in BESS. The GEP solar output, and hence energy above 50% of its capacity, depends on weather conditions, solar irradiance, and panel efficiency - where only this 'excess' is charged and discharged through BESS.
However, the fulfilment of the firming requirement of 50% and 4 hours will be tested and verified during commissioning activities.
CRESS
Are there any detailed guidelines on requirements to include community-scale battery storage?
What are the components in SAC?
Can lower System Access Charge (SAC) for Longer-Hour Batteries be considered?
What is the System Access Charge (SAC) for Non-Solar Technologies (e.g., Biomass/Biogas)?
What is excess energy?