While lithium batteries are only cost-effective for the supply of energy for short periods of up to four hours, a GridScale electricity storage system will cost effectively support electricity supply for longer periods – up to about a week.
However, the GridScale range covers both the 12-18 h duration required for day-to-day smoothing of solar PV, and the 3 to 7 days duration required for smoothing of wind power over gaps caused by low wind periods.
I agree there is no implemented AWES at utility-scale, and no credible promise for it. There is little chance that AWE will succeed without taking account of Power to space use ratio. But as AWE pursues to intend to be a major actor in intermittent renewable, the storage issue is relevant as for all existing intermittent renewables.
So this topic about storage is relevant. Is it the same for AWE?