"A Swiss-made catamaran has become the first solar-powered boat to cross the Atlantic after reaching the French Caribbean island of Martinique.... It is claimed to be the first-ever motorized vessel to complete the journey without using any fuel."

More information on solar energy can be found as follows:

Solar Energy and Peak Oil

Apollo 2: A campaign to dramatically increase solar energy development

Solar Thermal

Photovoltaics

The SolarEvolution in Mobility