SunPower Corporation is an American energy company that designs and manufactures crystalline silicon photovoltaic cells and solar panels based on an all-back-contact solar cell invented at Stanford University. The company is majority owned by Total, the fourth largest publicly listed energy company in the world. SunPower has operated from their California office since 1985. Over the years they have released more than 750 patents. Their projects go from residential and mobile applications to large-scale utility solar energy markets.