The projects, which have a combined total capacity of 35MW, are intended at bringing sustainable energy to more than 280,000 people in Argentina, Cuba, Iran, Mauritania and St. Vincent and the Grenadines.
IRENA director-general Adnan Amin said: "Renewable energy offers the prospect of clean, affordable power to the 1.3 billion people currently off the electricity grid.
"While renewable energy resources are abundant in many communities suffering from energy poverty, finance is still a key challenge for deployment. That is why the partnership between IRENA and ADFD is so important as a pioneering effort."
The projects will be financed in the second cycle, which is part of a commitment by Abu Dhabi to offer $350m worth of concessional loans over seven years for renewable energy projects in developing countries.
Projects approved for funding in the second loan cycle include solar, hydro, hybrid (wind and solar) and geothermal energy.
The projects represent a mix of renewable energy sources with potential replicable or scalable.
The third funding cycle is now open for project proposals, with concessional loan interest rates of 1% to 2%.
IRENA said the new lower rates will support a range of renewable energy projects across the rest of the five loan cycles.
