Cuba has completely run out of diesel and fuel oil, the country’s energy minister said on Wednesday, as Havana faces its worst rolling blackouts in decades amid a US blockade that has strangled the island of fuel . “We have absolutely no fuel (oil), and absolutely no diesel,” the energy minister, Vicente de la O Levy, said on state media, adding that the national grid was in a “critical” state. “We have no reserves.” Fuel oil is a product derived from crude oil distillation used to generate heat or power. The minister said blackouts had increased dramatically across Havana, with many neigbhourhoods in the capital without light for up to 22 hours a day. The national grid, de la O Levy said, was operating entirely on domestic crude oil, natural gas and renewable energy. Cuba has installed 1,300 megawatts of solar power over the past two years, but much of that capacity is lost to grid instability amid the fuel shortages, he said, reducing efficiency and output.…