Thoroughly committed to increasing Hawaii's use of clean energy and reducing dependency on imported oil, the Hawaiian Electric Company (HECO), along with its subsidiaries and various electric cooperatives across the islands, initiated a competitive bidding process in the late 2010s. This process aimed to develop several utility-scale solar and solar-plus-storage facilities. This paper specifically focuses on an advanced DC-coupled solar-plus-storage installation built on Hitachi Energy's Power Conversion System (PCS) and Power Plant Controller (PPC) technology. The Battery Energy Storage System (BESS) is co-located and integrated with the Photovoltaic (PV) plant to meet operational requirements, particularly during peak hours. The PCS and PPC are designed to comply with grid stability requirements, including frequency response, voltage, and frequency ride-through. Additionally, the system is designed to seamlessly energize a critical load on-site in the event of a blackout. To address reliability and resiliency requirements, the plant can operate in Grid Forming Mode (GFM), allowing for off-grid operation, as well as planned and unplanned disconnection and reconnection to the main grid. The design, sizing, functionality implementation, modeling and simulation, deployment, and operation of this solar-plus-storage plant are described in detail and documented with site data.