Earlier this week, GM announced that they were adding the world’s largest, rooftop, solar photovoltaic power installation to its car assembly plant located in Zaragoza, Spain (a factory that manufactures Opel vehicles for sale in Europe).   When the project is completed in the fall of 2008, the solar installation will have 85,000 solar panels covering about 2,000,000 sf of roof space.   Bloomberg further reports that the $78.5 million installation will avoid about 7k tons of emissions per year.

When fully operational, the Zaragoza solar installation will generate about 12 MW of power at its highest output.  The installation will generate about 15.1 million kWh of power annually, which is equivalent to the demand of 4,575 households with an average annual consumption of 3,300 kWh in Spain.

As to the specifics, GM partnered with Clairvoyant Energy, Veolia Environmental, and the Government of Aragon to develop the renewable energy project.  United Solar Ovonic provides the UNI-SOLAR® thin film flexible solar laminates for the project and GM will lease their roof space to Clairvoyant Energy and Veolia Environment, who will build, own, and operate the rooftop solar installation.  The lease is for a term of twenty-five years.