The present invention provides a protective backing sheet for photovoltaic modules. The backing sheet has a layer including fluoropolymer which is cured on a substrate, and the layer includes a hydrophobic silica. The amount of hydrophobic silica contained in the layer is within the range of 2.5 to 15.0% by weight, and preferably in the range of 7.5 to 12.5%. Also, the layer including fluoropolymer may further include a titanium dioxide.
