Puerto Rico’s grid stabilization efforts continue to face critical setbacks, with all four federally funded 25‑MW battery projects still paralyzed and Genera PR reporting yet another month of uneven performance across the island’s aging generation fleet. According to LUMA’s May 2026 Collaborative Report, the 4×25 MW utility‑scale battery installations remain completely inactive because PREPA has […]
Puerto Rico’s grid stabilization efforts continue to face critical setbacks, with all four federally funded 25‑MW battery projects still paralyzed and Genera PR reporting yet another month of uneven performance across the island’s aging generation fleet.
According to LUMA’s May 2026 Collaborative Report, the 4×25 MW utility‑scale battery installations remain completely inactive because PREPA has not completed the required FEMA documentation. The report states plainly that “PREPA has not yet complied… and therefore, all four projects remain inactive.”
The freeze halts procurement, land acquisition, and construction activities for projects that were intended to provide fast‑response grid support during peak demand and emergencies.
At the same time, Genera PR’s update shows a system still plagued by mechanical failures, delays, and forced outages. Aguirre Unit 2 is producing 350 MW, but other units continue to falter. San Juan Unit 6’s return to service slipped again—this time to June—after an exciter insulation failure. Palo Seco Unit 4 remains offline following repeated boiler issues.
The report underscores a pattern: while some units return to service, others fail, leaving the system in a constant state of reactive repair rather than strategic stabilization.
Beyond operational challenges, LUMA used the filing to again warn the Puerto Rico Energy Bureau that it cannot comply with new reporting mandates issued in February.
The Bureau ordered LUMA to include “targets” for vegetation management, vegetation clearing, and transmission line hardening. But LUMA says PREB has never defined what those targets should be.
“LUMA has been unable to include… the ‘targets’ requested… due to the lack of any definition or guidance from the Energy Bureau,” the company wrote.
LUMA asked for a meeting with PREB’s technical staff and requested that the requirement be waived until the Bureau provides clarity.
The company “respectfully reiterates its request… to waive this requirement until such time LUMA is able to obtain the needed clarity.”
Despite the regulatory friction, LUMA reported that eight transmission hardening projects were completed, with twelve more expected by the end of FY2026; 83 miles of vegetation trimming were completed in April, for a total of 1,170 miles in FY2026; that 89% of new protection settings for 230 kV lines were implemented and that substation upgrades were energized in Bayamón and Fajardo.
But LUMA also warned that funding uncertainty—driven by PREB’s limited FY2026 approvals—continues to threaten long‑term planning, especially for dynamic stability testing and protection system upgrades.
PREPA reported completing the operational extension for 17 TM2500 temporary generation units and noted that the Fiscal Oversight Board conditionally approved contracts for up to 800 MW of additional temporary generation.
But the report offers no clear path for transitioning away from emergency generation toward permanent, resilient infrastructure.
