[Note I got a pending post about solar farms that covers the more creative end of industrial design that will have additional examples that just might transcend into being sculpture].
There are several emerging genres of renewable energy art, that range from the photovoltaics or wind turbines powering sculptural lights versus the shape of the energy generating surfaces as sculpture, to using the PV cells or wind turbines for purely decorative effects, last but not least, is representative art depicting various renewable technologies.
I don’t consider all the small wind turbines sprouting like weeds in many cities to be art, just kinetic street decorations. At the other end of the art/decoration continuum are Theo Jensen’s Strandbeests and Calder’s mobiles which are certainly art – but since they don’t generate energy beyond their own motion, they will also not be included in this post either.
Lights on sticks
Lights on a stick seems to be the most common expression of renewable energy as public art as site lighting is required in many different situations…
Flash@Hebburn (2009), Hebburn Riverside Park on the banks of the River Tyne by artist Charles Quick. Hebburn, North East England. Photo credit: Adam Lawrenson
CO2LED was a temporary installation made by Jack Sanders, Robert Gay, and Butch Anthony in Rosslyn, Virginia in 2007.
Gorbet Design’s ‘Solar Collector’ (2008) installation at the Waterloo Regional Operations Centre in Cambridge, Canada is interactive and folks can program patterns [though it's currently undergoing 'maintenance'] via the website.
‘Stuifmeel Ideeen’, aka ‘Pollinating Ideas’ in Amsterdam East, captures the kinetic energy of park users with a baton mechanism that then powers the lights (helped by pv panels).
PowerPlant in Pasadena, CA (2006) by UeBERSEE seems to be powered by piezoelectrics capturing the 78′ tall pole’s swaying in the wind.