Havana is grappling with a surge of failures in its electrical grid. As July draws to a close, the Cuban capital is experiencing an average of 25 single-phase transformer breakdowns daily. On some occasions, this number has exceeded 60 in a single day, as acknowledged by the state-run Canal Caribe.
The Havana Electric Company has initiated an intensive operation to replace the incapacitated devices and restore infrastructure within the distribution networks. This effort involves specialized lineman crews from both the capital and various provinces.
Root Causes of Transformer Failures
Experts have pinpointed the "load coincidence factor" as a primary cause of this wave of failures. After prolonged power outages, the simultaneous reconnection of consumer equipment generates an explosive demand, overloading and damaging the transformers.
"In addition to the high temperatures leading to increased consumption, the extended blackout hours also contribute. Once the power supply is restored, the phenomenon of concurrent loads has led to excessive consumption in these transformers, resulting in heightened damage," cautioned a specialist quoted by the state media.
Challenges in Addressing the Crisis
The chain reaction of failures further complicates the response. According to another technician, "It affects not just one transformer but several, necessitating the initial identification of the fault, followed by the evaluation of its magnitude and, ultimately, its resolution. All of this consumes considerable time."
In Arroyo Naranjo's Párraga Popular Council, the impact has been particularly prolonged. Linemen have described grueling workdays: "For us, this is an everyday reality, starting at 8 AM and finishing at 2 or 3 in the morning," one crew member shared.
Structural Deterioration and Production Shortfalls
The scope of structural deterioration was highlighted by Energy and Mines Minister Vicente de la O Levy. He disclosed that, among a sample of 1,500 transformers inspected in Havana, 755 were operating with overloads exceeding 7% above recommended levels.
Domestic production falls short of meeting the replacement demand. Factories in Havana, Santa Clara, and Manzanillo collectively produce only about 70 units daily, and high-capacity equipment is not manufactured in Cuba. In June, the Electric Union admitted that there were no spare transformer parts available in any province.
A Broader National Electrical Crisis
This distribution crisis is part of a broader collapse of the National Electrical System. On July 23, the deficit reached 2,315 MW, approaching the historical record of 2,341 MW set earlier that month. Cuba has endured at least five total system blackouts in 2026 so far, and Havana has experienced outages lasting up to 20 to 24 hours daily.
The Ministry of Energy and Mines dispatched 15 lineman brigades from other provinces to bolster efforts in the capital, along with an additional 32 operators from Holguín. Some workers described their situation starkly: "I support providing energy to others, even though I leave home without electricity and return the same way. But what can we do? We must support the people," one operator remarked.
Amid recurrent blackouts and a wave of protest pot-banging — even with national calls to action — Havana has witnessed rare spells of illumination, particularly as the July 26th anniversary approaches. "This is a façade, a temporary lighting truce against a mobilizing population," asserted activist Leonardo Romero Negrín.
Understanding Havana's Electrical Challenges
What is causing the transformer failures in Havana?
The main cause of transformer failures is the "load coincidence factor," which occurs when power is restored after outages and all consumers reconnect their devices simultaneously, causing an overload.
How is the Havana Electric Company addressing the transformer issue?
The company has launched an intensive operation to replace damaged transformers and restore distribution networks, with specialized lineman crews from the capital and other provinces.
What challenges are faced in resolving the transformer failures?
Challenges include the chain reaction of failures affecting multiple transformers, requiring significant time for fault identification, magnitude evaluation, and resolution.
How does the current crisis relate to the broader National Electrical System collapse?
The transformer crisis is part of a larger collapse, with the national system experiencing significant power deficits and multiple full-system blackouts in 2026.