LUMA ao Negociado: o déficit segue em 700–850 MW e o verão já parece o pior caso

On September 9, 2026, Caribbean Business (Eva Llorens) reported that LUMA Energy, in a recent filing before the Puerto Rico Energy Bureau, stated that the electric system continues to face a structural generation deficit of between 700 and 850 megawatts. The transmission and distribution operator attributes the gap to an aging and degraded thermal fleet, frequent forced outages, deferred maintenance, and a peak demand driven by extreme heat. The focus of this note is PREPA/AEE — the system's owner — crossed with LUMA and with the temporary generation file that the Bureau monitors. Modeled deficit ≠ blackout on a specific day. LUMA filing ≠ independent finding by the Bureau already adjudicated in that piece.

The sensitivity analysis is the hardest part. In the base case, Puerto Rico faces eight days of load shedding between May and October. A 5% increase in load almost doubles those days. A 10% increase takes them to 26. The loss of another baseload unit raises it to 27. The combined scenario — 10% more load and another baseload outage — produces 47 days of relief and 230 hours of interruption. LUMA states that the actual events of the summer already resemble those worst cases. Model ≠ weather. Sensitivity ≠ blame assigned to one operator versus another.

Regarding the North American industry standard (a loss-of-load event every ten years, LOLE 0.1), LUMA says that the actual performance in fiscal year 2026 was 17 deficit events, “about 170 times worse” than the benchmark. Adding 800 MW of firm temporary generation would bring Puerto Rico closer to that standard; 200 MW would significantly reduce expected relays; 400 MW, even more; 800 MW would almost eliminate them. The range of 700–850 MW, the document says, has been maintained in four consecutive annual resource adequacy studies. An 800 MW projection ≠ existing contract. 2025 initiative of up to 800 MW (mobile units, barges, replacement equipment) ≠ already installed megawatts.

The Bureau requested the update after the government canceled a contract awarded to a consortium led by Power Expectations for 400 temporary MW. That cancellation reappears in the batch (notes 826 and 832) as litigation and as a motion from the AEE. Cancellation ≠ ruling on the merits of Power Expectations' lawsuit. 400 canceled MW ≠ 400 replaced MW.

Fleet numbers that the piece attributes to LUMA: more than 6,500 MW installed, about 4,100 MW actually available, and real-time availability that often falls near 3,200 MW after deducting forced outages and maintenance. The catastrophic failure of Aguirre 1 in February 2025 keeps one of the largest baseload units offline at least until the end of 2026. Installed capacity ≠ available capacity. Available on paper ≠ available at 7:00 p.m.

The summer of 2026, according to the document: 15 manual transfers in July and August, almost the total for the entire fiscal year 2025; 16 events already recorded for August, on track to match or surpass 2023 (25) and 2024 (33). Peak demand of about 3,234 MW in August, the highest in four years. Interruptions mainly in the late afternoon, when the reserve margin collapses and rooftop solar does not contribute. LUMA and Genera deferred maintenance in spring and summer to avoid immediate gaps; the document warns that this will increase forced outages and compress the winter maintenance window.

Cousin: 742 (Sep 10, PREPA to the Bureau about ~70 MW TM2500 and canceled RFP) is the immediate regulatory thread. This note from September 9 sets the deficit diagnosis. Primary: Caribbean Business. Subject: economy. Unique URL.

Closure: 700–850 MW; 8 / 26 / 27 / 47 days depending on scenario; 17 events FY2026; 3,234 MW peak; 800 MW as a modeled bridge, not as a fleet already purchased.

This note from Borinquen adheres to the cited primary source: it does not invent figures, does not turn an argument into a ruling, does not treat a budgetary obligation as a disbursement nor an accusation as a conviction. Obligated ≠ disbursed ≠ theft. Interdict ≠ final judgment. Audit with findings ≠ criminal conviction. Request for funds ≠ Board authorization. Signed contract ≠ measured hydrological or electrical outcome. Figures of clients without service are snapshots from a portal or a report, not a census of duration. Where the primary source remains silent on a number, this text also remains silent.