In collaboration with the G-PST Consortium, USAID and NREL have developed an open data platform, called RE Data Explorer, that provides publicly available high temporal and spatial resolution renewable energy data for many countries around the world. As an exciting development, a data upgrade is underway for Southeast Asia that will allow  visitors to visualize and download solar resource data at 10-minute intervals across a 2-km grid covering the entire region. These and other datasets within the RE Data Explorer can support system operators and other decision-makers in planning for power system transformation and deploying higher shares of renewables onto the grid.