The International Solar Energy Society (ISES), founded in 1954, is a UN-accredited[1] membership organization promoting and envisioning a world with 100% renewable energy for everyone used wisely and efficiently.

The ISES Headquarters are based in Freiburg im Breisgau, Germany and the society has members in more than 110 ten countries all around the world.

ISES is a member of the International Renewable Energy Alliance (REN Alliance).

The REN Alliance aims to provide the potential for a united voice on renewable energy issues and interests among global leaders in the renewable energy community and respective national and international associations.