Israeli start-up EnStorage has signed an R&D agreement with international energy management company Schneider Electric and French energy corporation Areva to develop a renewable energy storage system.  It will allow energy producers to store from 150 KW up to many megawatts for over six hours.

http://www.globes.co.il/en/article-renewable-energy-storage-co-enstorage-signs-rd-deals-1000986163