> It's a common misconception that energy storage needs to handle all the power needs of an area for a significant time. You are only looking one half of the p

> It's a common misconception that energy storage needs to handle all the power needs of an area for a significant time. You are only looking one half of the problem. Wind power in the UK has a power factor of about 35%. What that means is to meet the average demand from the UK electricity grid we'd need not install 3 times as much Wind Power as the demand. This is borne out in the current figures, we have some 25GW installed wind power for an average of about 6GW supplied. If we have enough renewables to meet the demand on average, a windy day across the UK is going to result in a glut of power. If we don't have ways of storing that modestly efficiently then our only choice will be to take turbines out of service, increasing the overall cost.