no, but they do use power to keep them turningin low wind conditions.
(
Thor_sonofodin has done things, terrible things on,
Fri 18 Jun 2010, 13:45,
archived)
it's same with solar panelsyou need to insert batteries into them for night use
(
Griffin Saver Something, something, 2006, something.,
Fri 18 Jun 2010, 13:46,
archived)