LUMA Energy has completed the interconnection works needed to bring a 32-megawatt solar plant developed by YFN Infinigen in Yabucoa onto Puerto Rico's grid. ^[1][2] The work centered on the Juan Martin substation, which LUMA upgraded as the plant's tie-in point. ^[3] That included expanding the substation's 115-kilovolt busbar ^[4] and installing new protection, automation, control and metering equipment to monitor the plant's output once it flows. ^[5] LUMA also energized a new 115-kV transmission line, the physical link between the solar facility and the grid. ^[6] "Every project that enables the integration of new generation sources represents important progress for Puerto Rico," said Esther Serra, LUMA's senior director of renewable energy projects. "These efforts are essential to supporting energy diversification and advancing toward a more stable electric system for our customers." ^[7] The plant is expected to begin commercial operations in the coming months. ^[8] A battery energy-storage system is also planned for connection at the same substation, designed to support grid frequency and voltage stability and serve demand during peak hours; its capacity and schedule have not been announced. ^[9][10]