The lights are going out in Havana with alarming frequency. Cuba, an island nation already squeezed by economic sanctions and crumbling infrastructure, is now experiencing blackouts that last up to 12 hours a day. This is not merely an inconvenience. It is a symptom of a stranded energy system: one that relies on imported fossil fuels, aging Soviet-era power plants, and a grid that cannot handle the load. The situation is deteriorating rapidly, and the government's temporary fixes, like rolling blackouts, are only masking a deeper malaise. But there is hope from across the Atlantic. The British model of energy resilience, honed through decades of grid modernisation and renewable integration, offers a viable blueprint for Cuba's energy transition. The question is whether the political will exists to follow it.
Cuba's energy crisis is physical, not political. The country generates roughly 60% of its electricity from oil-fired plants, many of which are over 40 years old. Breakdowns are routine. In July, a fire at the Antonio Guiteras plant, the nation's largest, knocked out 10% of generation capacity. The grid operator, Unión Eléctrica, has had to implement rotating blackouts to avoid a total collapse. But the physics of a failing grid are unforgiving. Every time a plant trips, the frequency drops, and the system becomes unstable. Voltage sags damage equipment. The ripple effects are felt in water pumps, hospitals, and food storage. This is a biosphere collapse in miniature: a system that has lost its resilience.
Resilience is the key term here. In energy terms, it means the ability to withstand shocks and recover quickly. The United Kingdom has spent two decades building this property into its grid. After the 2003 blackout that affected 500,000 people in London, the British government mandated smart meters, decentralised generation, and demand-side response. Today, the UK's grid can handle a 10% loss of generation without significant disruption. It does this through a web of interconnected microgrids, battery storage, and flexible gas plants that can ramp up in seconds. The result is a system that is robust, not brittle.
For Cuba, the path to resilience starts with four steps. First, stabilise the existing grid with synchronous condensers, which provide inertia and voltage support. These machines, essentially giant flywheels, can prevent the frequency swings that cause blackouts. Second, deploy distributed solar and battery storage at the community level. This reduces reliance on long transmission lines and gives local control. Third, introduce smart metering and time-of-use tariffs to shift demand away from peak hours. Finally, invest in energy efficiency, particularly in buildings and industry. The International Energy Agency estimates that efficiency measures could reduce Cuba's electricity demand by 30%.
The technology exists. The question is finance. Cuba's GDP per capita is less than £8,000, and its foreign debt is crippling. But the cost of renewables has plummeted. Solar photovoltaic panels are now cheaper than diesel generation, even without subsidies. The World Bank has funded similar projects in the Caribbean, including a 50-megawatt solar plant in Jamaica. Cuba could tap into these funds, but it requires a shift in governance. The current system is centralised and opaque. A resilient grid demands transparency and local participation.
There is also a cultural dimension. Cubans are used to state-provided electricity. The blackouts are changing that. Across Havana, people are buying small solar panels and batteries from Chinese suppliers. This is a grassroots adaptation, a response to system failure. But without grid integration, these microsolutions remain isolated. They cannot back up the grid or share surplus power. The UK's success came from combining top-down planning with bottom-up innovation. Cuba needs the same balance.
The clock is ticking. Climate change is intensifying. Hurricanes are becoming stronger, threatening the transmission lines. Sea level rise is already causing saltwater intrusion into coastal substations. Cuba cannot afford to wait another decade. The British model shows that resilience is built, not bought. It requires investment, but the return is measured in avoided catastrophe. For Cuba, the blackout hell is a warning. For the world, it is a test case. If an isolated island can transition to a clean, resilient grid, anywhere can. The blueprint is there. The question is whether Cuba will use it.
