The site is off grid due to its remote location. The primary mode of operation is with the BESS as the voltage source operating in VF Droop (VSG – Virtual Synchronous Generator) along side the PV. The generator is only called on when the BESS no longer has discharge capacity to support the load (due to Low SOC (State of Charge) or being out of service).
 
The two Sungrow BESS are operating as a single ‘BESS System’ behind a single BCB. They always operate in VSG mode. The aggregation of the individual BESS into the BESS system occurs in the hybrid controller and the Gateway.
 
The BESS requires a ‘SOC Calibration’ once a month where the individual BESS units must be charged to 100%. This is handled by a schedule set up in the Hybrid controller timers. Each BESS 1 will calibrate on the first Sunday of every month. BESS 2 will calibrate on the third Sunday of every month. Calibration can be manually triggered or cancelled on the InteliVision 12Touch display.
 
The hybrid system allows for the school to receive a resilient and reliable source of power for the remote community, whilst also having the added benefit of being much quieter, since the diesel generator isn’t used as regularly. This enables the students to be able to concentrate on their studies, and achieve success to benefit themselves, and their community at large.