A lot of these posts only mention "panels", but i think these are actually complete systems with energy storage.

http://www.cubanews.acn.cu/cuba/27800-cuba-receives-donation-of-photovoltaic-systems

https://juventudrebelde.cu/index.php/cuba/2026-03-11/paneles-solares-donados-por-china-garantizaran-servicios-de-telecomunicaciones/imprimir#1#1