Dr. Renné served as President of the International Solar Energy Society from 2010 - 2019.  From 1991 until his retirement in 2012 Dr. Renné managed the solar resource assessment activities at the U.S. National Renewable Energy Laboratory (NREL).  In 2012 he formed the consultancy Dave Renne Renewables.  He is dedicated to the concept of urgently achieving 100% renewable energy to meet all of our end use energy requirements as the best solution to the climate crisis.