The North American Electric Reliability Corp. ( NERC) warned that disturbances to the electric power grid due the loss of inverter-based resources warrants a handful of actions that generator owners must take before the end of June.

NERC issued the Inverter-Based Resource Performance Issues Alert on March 14 and sent it to generator owners of bulk electric system solar photovoltaic (PV) generating resources. 

The alert came after NERC analyzed what it said were “multiple large-scale disturbances” in 2021 and 2022 involving the widespread loss of inverter-based resources. These events led to “abnormal performance” across solar PV generating resources on the bulk electric system. 

NERC said those “systemic performance issues” could lead to potential widespread outages if they were to persist. 

Two disturbances in Odessa, Texas, resulted in what NERC characterized as abnormal performance across several solar PV resources.

It said that as the penetration of inverter-based resources continues to increase, “it is paramount that any performance deficiencies with existing and future generating resources be addressed in an effective and efficient manner.”

The document released by NERC contained a handful of recommendations for specific actions to be taken. It said that entities registered as generator owners are “required to acknowledge receipt and re