Nick Heyward, who manages the UK Power Networks project, explains that our electricity grids need to balance supply and demand at all times, but they are struggling to cope as more wind and solar power comes online.
"One solution could be to add capacity to the existing grid, but that could be very expensive and disruptive," he says. "And then you have the problem of energy curtailment - where wind and solar plants are switched off when there isn't much demand, which is a waste."
Storage systems like SNS offer the ability to export energy to the grid at times of high demand, and keep it in reserve when demand is low.
Mr Heyward believes that if such plants were replicated across the UK, it could unlock more than £600m ($895m) of benefits annually by 2040.
