Cuba manages to restore its National Electric Power System after a massive blackout
Cuba’s National Electric System (SEN) has been restored this Saturday, achieving the interconnection of all the country’s provinces. This recovery process took approximately 32 hours, after the territory faced the eighth general blackout to occur during the current year 2026.
Although the transmission system is already energized, the authorities of the Electric Union (UNE) have warned that the situation remains critical. Lisner Cruz, head of operations for the entity’s load dispatch, explained on national television that electrical disruptions persist severely across a large part of the nation.
Technical challenges and lack of fuel
The system reconnection was classified by technicians as a complex and lengthy task. The process had to be executed sequentially, energizing substations individually before achieving full grid synchronization. According to authorities, the main obstacle has been the shortage of fuel needed to power the thermoelectric plants.
It has been a very difficult interconnection and it had to be done sequentially, because the country does not have enough fuel for thermoelectric generation.
Lisner Cruz, head of operations at UNE
To attempt to stabilize the service, the UNE has relied exclusively on thermal blocks and systems that operate with crude oil and national gas, in addition to contributions from photovoltaic energy, which was limited due to the adverse weather conditions recently recorded.
Origin of the failure and energy crisis
- The initial fault originated in a 220-kilovolt transmission line connecting Matanzas to Cienfuegos.
- The incident caused a chain disconnection throughout the national territory.
- Climatic instability and the chronic fuel deficit aggravated the magnitude of the collapse.
The restoration of the SEN is a slow technical procedure that requires more than thirty hours to ensure that thermoelectric plants, the backbone of power generation in Cuba, receive the necessary current to return to large-scale operation and meet citizen demand.
This event marks the eighth general blackout in Cuba so far in 2026. The energy crisis the island is going through, characterized by an obsolete electrical system, has been intensified by difficulties in crude oil imports, which has generated recurring instability in the electricity supply for the population.
