The amount of renewable energy produced around the world is increasingly exceeding demand – particularly from wind and solar sources. This presents a significant challenge when limited grid capacity and insufficient energy storage mean this clean power has to be curtailed, wasting the excess generation. The scale of this problem is substantial.
In the UK, for example, wind farms were forced to curtail 4.3 terawatt (trillion watt) hours of surplus energy – about 5% of their annual output – in 2023. This would have been enough to power 1.5 million homes for the year, so failing to harness it cost bill payers roughly £300 million and left some energy providers facing costly constraint payments.
