The Antonio Guiteras Thermoelectric Plant, Cuba's largest electricity-generating facility, faced another shutdown from the National Electric System this Friday. This marks the seventeenth time this has occurred in 2026, just four days after it had been reconnected.
The root cause of this ongoing issue is once again a malfunction in the boiler's economizer, the very component responsible for half of the plant's stoppages throughout the year.
Journalist José Miguel Solís shared on Facebook that experts suspect the economizer remains faulty. Preparations are underway for another repair, pending the 48-hour cooling period required for the boiler.
According to engineer Román Pérez Castañeda, the general director of the plant, a complete overhaul is currently unfeasible. He stated, "At this moment, replacing all the elements of the economizer is impossible due to the time it would require."
Pérez Castañeda clarified the constraints: "It's not that we lack the necessary pipes or the capability to configure them; rather, it's a task that would take several days, and currently, 200 megawatts are crucial."
The immediate plan involves resuming the boiler's inspection on Sunday morning, identifying defects, and replacing faulty conduits. "We anticipate the repair will take up to six days, starting from 6 a.m. this Friday," Pérez Castañeda specified.
The repair effort will require personnel from the Maintenance to Power Plants company, along with the design and planning for replacing damaged pipes and checking other potential failure areas.
Longstanding Structural Issues
The economizer at the Guiteras plant has been in continuous operation for 38 years, enduring a highly corrosive environment, and hasn't received a major overhaul since 2010. Experts suggest a complete repair would involve replacing approximately 500 tubes and between 1,000 and 1,200 weld seams, necessitating a shutdown of at least 180 days, a project that authorities have repeatedly delayed.
This is the fifth consecutive shutdown due to the same component failure, highlighting a structural deterioration that partial fixes have been unable to address. The economizer accounts for 50% of all plant shutdowns in 2026, totaling 293 hours of downtime between January and late May.
The recent breakdown worsened the national electricity deficit to 2,206 MW, just two megawatts shy of the historical record of 2,208 MW set on June 25, 2026. Power outages in Cuba last between 20 and 30 hours daily in Havana and up to 87 consecutive hours in Matanzas, sparking protests in municipalities like Marianao with chants of "Freedom!"
Energy and Mines Minister Vicente de la O Levy pledged a major overhaul of the Guiteras plant by the end of 2025. However, this was postponed in December of that year due to a "temporary issue" and announced again in April 2026 without a specific date, leaving the plant to operate on temporary fixes on an infrastructure that has lacked a comprehensive intervention for decades.
Understanding the Guiteras Plant's Challenges
What is causing the frequent shutdowns at the Guiteras plant?
The frequent shutdowns are primarily due to failures in the boiler's economizer, which has been a recurring issue throughout the year.
Why hasn't the Guiteras plant received a complete overhaul?
A complete overhaul has been delayed due to the significant time and resources required, alongside a reliance on patchwork solutions to maintain operations.
How have the power outages impacted Cuba?
Power outages have resulted in prolonged blackouts, reaching up to 87 consecutive hours in some areas, leading to public protests and unrest.