Hi I belive a wind generator was fitted at Halley in 95. I am not sure how it got on. Wind power would be an option but at Halley the largest electrical load is when it is cold and calm. It can get down to -50.C. When it is windy it is usualy mild and thus the electrical load is low. I was generator mechanic at Rothera and Tractor Mec. at Halley so this is from personal experiance. Small solar pannells are used on remote weather stations and to charge the batteries of the radios used in the field.
Wintered at Rothera 92,93. And wintered at Halley 94. Now live and work Turkey looking after privat yachts.