SunPower Corp is a vertically integrated solar module manufacturer and systems installer. The company's modules derive from crystalline silicon technology and possess the industry's highest conversion efficiencies (the percentage of sunlight that is converted into electricity). French oil giant Total is now SunPower's majority shareholder. The operatinig business segments of the company are SunPower Energy Services and SunPower Technologies.. The maximum revenue of the company comes from SunPower Energy Services Segment, which includes sales of solar energy solutions in the North America region, and direct sales of turn-key engineering, procurement and construction services.