Blow winds and rack your whatever

I’ve just been having a look at my wind farm and the manager is highly chuffed with the way things are going. When there are gales blowing, the government pays him not to send power to the National Grid to prevent an overload, so he diverts it to his pumping station for a hydro-electric storage system. Which provides carbon-free (and therefore heavily subsidized) power when the winds don’t blow. Magic!