There is a lot of focus on the ability of battery storage to shift peaks and store energy for hours, or even days. But energy systems with high renewables penetration will need longer term solutions – hydrogen, compressed air, pumped hydro are three technologies being looked at in Australia and elsewhere.

via Renew Economy http://reneweconomy.com.au/2013/the-long-term-storage-challenge-batteries-not-included-73186?utm_source=rss&utm_medium=rss&utm_campaign=the-long-term-storage-challenge-batteries-not-included-73186