Cuba suffered a new total disconnection of the National Electric System (SEN) on Monday when a frequency oscillation undermined the progress the system had achieved throughout the day, according to official information.
«A new disconnection of the National Electrical System occurred a few minutes ago. Despite the progress made today, a fluctuation caused the failure. We will provide more details later,» explained the official journalist Lázaro Manuel Alonso.
The collapse occurred hours after the sixth total blackout recorded this Sunday at 10:43 PM, confirmed by the Electric Union (UNE).
The system had not yet fully recovered from that blow when it fell again this Monday.
The recovery before this fluctuation was barely partial and fragile. Havana woke up with only 14% of its electricity supply: 87,480 customers and 78.51 MW, with 12 substations and 29 energized circuits, prioritizing 19 hospitals and two water pumps.
In that context of minimal recovery, the Antonio Guiteras thermoelectric plant initiated a cold start at 10:17 in the morning, with the expectation of synchronizing to the national electrical system by nightfall.
The plant, located in Matanzas and considered the largest unit block of the Cuban electrical system, has accumulated at least 17 unplanned outages in 2026 and has not received capital maintenance since 2010.
On the other hand, the Telecommunications Company of Cuba S.A announced this Monday interruptions to the cellular phone service nationwide due to the breakdown of the generator that provides electrical support to one of the main centers that supports the mobile network of the country.
According to the informational note published on Facebook by the state telecommunications company, the affected numbers are those beginning with the prefixes 52, 509, 598, and 599.
With this new disconnection from the SEN, millions of Cubans will once again be left or will continue to be completely in the dark, with no hope of receiving even two hours of service, while the restoration of the system—which was already progressing slowly—will now face an even greater delay.
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