FREMONT, CA--(Marketwired - January 06, 2016) - Imergy Power Systems, a leader in advanced energy storage solutions, announced today that a South Africa-based multinational mobile telecommunications company that provides services to more than 200 million subscribers in Africa, Europe and the Middle East has purchased a further 105 Imergy ESP5T vanadium flow batteries in addition to an original pilot of 20 systems, to provide backup power to base station sites in the country.