High materials costs and slow approvals for new wind power projects reduce profitability. Danish wind farm developer Orsted announced a €335 million impairment on a US offshore project due to “unprecedented cost inflation”. Supply-chain issues, inflation, competition from China and lower demand drove turbine makers to cut jobs last year.

For a few hours last week, British consumers were asked to turn the lights off. There was a financial incentive offered. Less reliable renewable sources and the switch to electric cars and home heating will make this even more common. Home owners might hand over some control of their power use to suppliers, allowing them to switch off things remotely.