Millions of Cubans lose power after national grid fails

Cuba has powered itself by relying on cheap oil imports from Venezuela and Russia. As both of them have slid towards collapse, it is speculated that Cuba is flat out running out of the bargain fossil fuels it relies on to operate. This is now causing widespread blackouts as the country continues to fall apart.

Sad to see, but at least it isn't freeze-to-death temperatures there.

What alternatives does Cuba have for energy? You'd figure that it'd be a good choice to set up battery backed solar, but perhaps they don't have the capital to get started?