Earlier this month, Mirebaliais Hospital in Haiti starting installing 1,800 solar panels.

The hospital, run by non-profit Partners in Health, will have the largest solar array in Haiti and expect the panels to pay for themselves in less than three years.

“The Caribbean has some of the highest electricity rates in the world,” Bill Clinton said at the Sustainable Operations Summit in New York last Thursday. “Almost every country in the Caribbean could be completely energy independent with solar, wind, geothermal and biomass.”