Yeah, China.

“China is offering solar energy to Cuba, an old ally left without power amid the US oil embargo, in a show of strength for Chinese renewable-energy credentials and a sign of Beijing’s economic footprint in Latin America.“

Hopefully US doesn’t blow up the ships.

https://www.scmp.com/economy/china-economy/article/3346978/china-help-cuba-solar-energy-amid-us-oil-blockade-and-total-power-outage