The owner of this 205 MW utility-grade solar PV facility was adding battery storage and required a solution that could manage both solar and storage as separate resources for California Independent System Operator (CAISO) dispatching purposes. The controller also needed to prevent the combined output from both solar and storage from exceeding the interconnection capacity and had other requirements related to managing the combination of solar and battery power output.

To ensure safety and reliability, PXiSE implemented its Renewable Power Plant Controller to provide the necessary coordination and integration between the pre-existing solar PV communication and control equipment and the new BESS equipment. The software ensures protection from an excessive dispatch of the combined solar and storage capacity that could exceed equipment and system limitations.