Louise Hutchins, climate campaigner for Greenpeace, said: \”At the moment it [renewable energy] is a very small share in electricity and small fluctuations in weather can have an impact on the percentage of supply. When we have a lot more renewable energy there will be a lot more stability.\”
If we had many different types of renewable energy and their efficiency or output were uncorrelated, this would be true.
However, we don\’t: solar PV is not going to be a significant part of the mix anytime soon, we\’re not building any more large scale hydro (and small scale won\’t make much difference because it\’s, umm, small scale) and so pretty much everything is going into wind.
And yet we do know that it is possible for, in mid winter, on a cold day (our cold mid winter days being caused by the sort of weather formation that does this) for there to be nowhere in the British Isles at all where there is sufficient wind to generate electricity.
So as far as I can tell (and please do correct me if I\’m wrong) Greenpeace here is (surprise!) wrong. Greater reliance upon renewables will increase instability of supply.