LUMA Energy President & CEO Juan Saca By THE STAR STAFF The Puerto Rico Energy Bureau (PREB) has concluded evidentiary hearings in the rate review process, marking the end of several weeks of technical, transparent, and rigorous analysis of the island’s electrical system and the investments needed to strengthen the quality, reliability, and resilience of the service provided to customers. As requested by the PREB, LUMA Energy, the private operator of the island’s electric power transmission...