Sustainable, renewable forms of energy like solar power are starting to gain an edge over their fossil-based rivals. But how do you store sunshine?
The U.S. Energy Information Administration has predicted that this year, "total renewables used for electricity and heat generation will grow by 3.4 per cent," while the International Energy Agency (IEA) has stated that, "Globally, renewable electricity generation is now on par with that of natural gas."
In this brave new world, where renewables dovetail with more conventional sources of energy, storage is going to become increasingly important. EnerVault, a California based company founded in 2008, has developed what it describes as, "grid-scale, long-duration energy storage technology."
The development of reliable and cost-efficient storage of renewables such as wind and solar has so far proved to be a challenge. EnerVault's system is based on the use of "iron-chromium redox flow battery technology pioneered by NASA," according to the company's website.
Ron Mosso is the CEO of EnerVault. "This process is based on electrochemical energy storage," he told CNBC's Sustainable Energy. "We are converting electricity into chemical energy… storing it as chemical energy and then converting it back into electrical energy when we want to deliver it to a user," he added.