With the generation capacity of renewables, led by solar PV and wind power, on the rise across the globe — 46 percent of newly installed generation capacity in 2013 was renewables — investors large and small are scrambling to find cost-effective means to store power and balance energy systems.

This article is part of our Renewable Energy World January/February Annual Outlook Issue for 2015. The issue includes our Global Directory of Suppliers. If you are not already a subscriber, CLICK HERE to subscribe!