By 2026, Cuba’s energy system was no longer simply strained — it was hanging by a thread. What had once been a heavily centralised, oil-dependent electricity network was rapidly unravelling under the combined weight of fuel shortages, ageing infrastructure and geopolitical pressure. In that context, solar power stopped being a climate policy aspiration and became something far more urgent: a national survival strategy .
From Fuel Dependency to Structural Breakdown
For decades, Cuba’s electricity supply relied on imported fossil fuels feeding large thermoelectric plants. But by early 2026, national oil reserves were often estimated to cover just 15 to 20 days without new shipments . The decline was dramatic. Mexican deliveries fell from an average of 37,000 barrels per day in 2025 to roughly 3,000 barrels per day in January 2026 — a drop of more than 90 per cent . At the same time, Venezuelan supplies, previously a core energy lifeline, ceased altogether .
The numbers translated directly into daily hardship. Peak electricity deficits rose from around 1,000 megawatts to roughly 1,500 megawatts . Demand regularly exceeded 3,000 megawatts, yet supply at times covered barely half that requirement . In several eastern provinces, rolling blackouts stretched to 24 hours . United Nations officials warned the situation was edging towards humanitarian collapse .
Compounding the fuel crisis was the condition of the Cuban National Electric System (SEN). Much of the thermoelectric fleet had long exceeded its intended lifespan, with frequent breakdowns and chronic inefficiency . The system was brittle even before fuel flows tightened; once shipments faltered, failure accelerated.
Sanctions and the “Fuel Blockade”
Energy in Cuba cannot be separated from geopolitics. In January 2026, a United States executive order introduced additional tariffs targeting countries that supplied oil to the island . Cuban officials described the move as a “real blockade”, designed to cut off fuel and paralyse the economy .
The broader embargo, in place for six decades, has been estimated to have caused more than US$170 billion in cumulative damage at current prices . Measures introduced in the most recent twelve-month period alone reportedly cost the country over US$7.5 billion . Access to hard currency for fuel imports and spare parts became increasingly constrained.
In that environment, renewable energy was reframed not as environmental virtue but as strategic independence. Solar power offered something oil could no longer guarantee: insulation from volatile markets and the reach of unilateral sanctions .
A Roadmap to 2050
The government formalised this pivot in September 2024 through a National Energy Transition Strategy running to 2050 . The headline ambition is bold: full renewable electricity generation by mid-century.
The plan unfolds in stages. By 2030, renewables are intended to account for 24 per cent of the national grid . More immediately, the goal is 2,000 megawatts of installed solar capacity by 2028 . A further milestone set for 2035 aims at what policymakers describe as “electrical independence”, combining expanded renewables with national fuels such as domestic heavy crude .
Nine implementation axes underpin the strategy, spanning grid transformation, industrial electrification, agro-industrial productivity, residential incentives, finance reform and scientific collaboration . A defining feature is decentralisation. Rather than relying solely on large power stations, Cuba is promoting distributed generation — producing electricity closer to where it is used. This is intended to cut transmission losses, currently around 16 per cent, and improve resilience against localised failures .
Rewriting the Rules
Policy reform has accompanied infrastructure rollout. Decree-Law 345, introduced in 2017, allowed private producers to sell surplus electricity to the grid . Momentum accelerated in February 2026 with Resolution 41/2026, expanding tax benefits for individuals and non-state actors investing in renewable systems .
Under the revised framework, qualifying investors can access eight years of exemption from personal income and profit taxes . Certification from the National Office for the Rational Use of Energy (ONURE) is required to validate technical standards . Duty-free importation of panels, inverters and mounting structures has also been broadened .
The intention is clear: mobilise the growing private sector — from farmers to artists — as active participants in the transition.
Ninety-Two Solar Parks
At the centre of the immediate build-out sits an ambitious program to construct 92 utility-scale solar parks, delivering 2,000 megawatts of capacity . By October 2025, 35 facilities were operational, contributing around 750 megawatts . Installed renewable capacity expanded by 350 per cent during 2025 alone .
Projects are geographically dispersed to stabilise regional supply. In Camagüey, the Luaces and Vertientes parks each produce 21.8 megawatts . Holguín aims for five photovoltaic farms totalling 109 megawatts . High-efficiency 555–560 Wp panels, often exceeding 42,000 units per site, are standard .
Facilities are engineered for Caribbean conditions, incorporating grounding and lightning protection. Even so, weather has posed delays; heavy rains disrupted works at Pilón before completion in March 2025 .
China and Critical Minerals
A decisive external partner in this expansion is China. Agreements signed in December 2024 covered seven solar parks totalling 35 megawatts, alongside material support for a further 22 projects . The partnership aligns Beijing’s surplus solar manufacturing capacity with Havana’s urgent infrastructure needs.
Underlying the collaboration is access to critical minerals. Cuba holds significant reserves of nickel and cobalt, essential for battery production . Reports indicate that infrastructure support may in some cases be exchanged for mineral resources, sidestepping US-dollar financial constraints .
Power from the Bottom Up
While industrial parks form the backbone, a quieter transformation is happening at household level. Since 2024, solar installation businesses have multiplied . Entrepreneurs, including small business owners in Havana, see rooftop systems as protection against grid unreliability and diesel scarcity .
Rooftop panels now appear on tricycle taxis to extend operating range during fuel shortages . Systems remain expensive and often priced in foreign currency, meaning adoption is concentrated among those receiving remittances or running successful private ventures .
Rural electrification remains a priority. By 2022, more than 160,000 remote homes were already powered by solar modules . Plans for 2026 include 5,000 two-kilowatt systems for households beyond the national grid and another 5,000 installations for priority sites such as maternity homes and polyclinics .
Grid Fragility and Storage Gaps
Generation growth does not automatically equal reliability. Cuba’s transmission network — described by experts as resembling “Italian spaghetti” — suffers from age and insufficient monitoring . Approximately 16 per cent of electricity is lost during distribution . Without comprehensive modernisation, additional solar capacity risks being trapped in localised pockets.
Storage presents an even sharper constraint. Solar output peaks during daylight, yet demand typically surges between 7 pm and 8 pm . By late 2025, only four of 55 planned facilities included battery systems . Construction of a 50-megawatt battery park in Cotorro aims to support frequency regulation and grid stability . Technical estimates suggest that every 1,000 megawatts of photovoltaic capacity requires roughly 100 megawatts of battery regulation .
Inequality in the Sunshine
Cuba’s economy is projected to contract by 5 per cent in 2025 . In that setting, solar expansion brings both hope and disparity. A single panel priced around £100 can equal ten times the average monthly salary in some sectors . Access to energy independence is therefore uneven, widening what observers describe as a “solar divide” .
Healthcare consequences are immediate. Clinics without reliable electricity struggle to maintain vaccine refrigeration and operate essential equipment . Fuel shortages have also disrupted water pumping and food transport, increasing risks of malnutrition and disease . In this light, solar deployment functions not only as infrastructure policy but as public health intervention.
A Transition Under Pressure
Cuba’s solar expansion between 2024 and 2026 is not a leisurely green transformation. It is a compressed, high-stakes restructuring forced by external constraint and internal fragility . The state is racing to install 2,000 megawatts of capacity while encouraging citizens to generate power themselves. China provides capital and equipment; domestic policy reforms unlock private participation; communities improvise.
Whether the build-out can outpace grid weakness, storage shortages and economic contraction remains uncertain. What is clear is that the island’s energy future now rests on the sun. The solar pivot is no longer optional policy — it is the foundation on which Cuba’s stability may depend.
