Emerging hybrid renewable energy systems offer new opportunities for the global energy industry with disruptive market potential, and a scalable, economic, and reliable solution applicable to a power system of any size (e.g., interconnected power systems, islands, microgrids, remote communities, etc.). The National Renewable Energy Laboratory (NREL) conducts many research projects in the area of hybrid power plants and hybrid power systems funded by the U.S. Department of Energy and in collaboration with members of U.S. and international energy industry. We will present NREL’s results for several projects involving hybrid systems for different use cases, including: (1) operation of hybrid PV-storage system in a typical island – cases of Puerto Rico and US Virgin Islands; (2) co-located utility-scale hybrid power plants with GFM capabilities, (3) role of GFM wind power for stability enhancements, (4) hybrid BESS-synchronous condenser systems for stability and resilience. We will also provide insights on stability related challenges for hybrid power plants with special focus on grid-forming controls.