Cuba is rapidly expanding solar capacity despite a crippling US oil embargo and severe nationwide blackouts, with substantial financial and technical support from China. The expansion is real and accelerating — Cuba added 20% renewable capacity in just 12 months — though it's unclear whether this constitutes the world's absolute fastest solar growth, and the blackouts affecting 10 million residents continue worsening. The post's framing emphasizes the silver lining (renewable revolution) while the underlying crisis (energy collapse) remains the more immediate reality for most Cubans.