12 projects have entered the first stage of the UK Department of Energy and Climate Change’s (DECC) energy storage competition. Those that reach the second stage will be vying for a share of the £17 million offered.
The variety of the competitors is huge. As expected, there was a large proportion of battery technologies proposed.
The battery solution chosen to proceed in the competition was a vanadium redox flow battery proposed by Wokingham firm REDT. While the company’s technology is said to be less efficient than other batteries at 75-80 percent efficiency (most batteries are about 95 percent efficient), depending on duty cycle of £1.7m to £1.9m per megawatt, thus allowing its cost to be lower than other battery systems over a 10- to 15-year lifespan.
Other interesting solutions included using gravel ski lifts, and using excess renewable energy to produce methane which can be easily transported and burnt as fuel.
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