Dr Herman Ibrahim, Board Member National Energy Council, Indonesia, International Geothermal Association (IGA), For many years, renewable energy systems were seen as dependent on non-renewable sources. Challenges of cost, variability, storage and ancillary services have been put forward as barriers to a renewable future. However, an increasing number of cases describe 100% renewable energy systems, utilizing the differentiated, but mutually supportive, characteristics of different renewable sources. Leading energy agencies will present the current status of the renewables sector, and representatives of each renewable energy technology will contribute on behalf of their constituencies.