A Paraguayan here. The above claim is not entirely true. Paraguay has access to Itaipú hydropower, and it certainly powers most of the energy grid, but not all

A Paraguayan here. The above claim is not entirely true. Paraguay has access to Itaipú hydropower, and it certainly powers most of the energy grid, but not all. There's also the Yacyretá dam, which is jointly held with Argentina, downstream from the Itaipú site on the same Paraná river. It generates quite significant amounts of electricity and Paraguay also uses some of it to power its grid. And there's also the Acaray dam, which is wholly owned by Paraguay, in operation since 1973. There's also a dam on the Yguazú river (not the same river than the one with the falls) which is not machinized but otherwise ready to enter production once it's equipped with turbines. Some isolated locations on the Chaco (northern area) also run on solar power and some also on timber/wood-based plants, but these are rapidly being obsoleted by power lines coming from Itaipú. With that provision aside, it could be said that Paraguay has been getting its electrity from wholly renewable sources since at least 1983.