Costa Rica is on the verge of powering their electrical grid with renewable energy full time.

Costa Rica has used only renewable energy to power its electricity grid for over 100 days. They were able to go for 121 days without using fossil fuels and now they hope to do it for a whole year.
Costa Rican Electricity Institute reports that last year renewable energy sources made up 99% of the Latin American country’s electricity. And they had 285 days that were totally powered by green energy.
Costa Rica has a unique climate and terrain, so they’re able to take advantage of several renewable energy sources. Most of it comes from hydroelectric power plants, thanks to their rivers and heavy tropical rainfall. They also use a combination of wind, solar, and geothermal energy.

Source: Inhabitat

Note Looks they are way ahead of us.