NOVELTY - The coated substrate comprises a substrate having a first surface and a second surface, a transparent conductive oxide coating on the first surface, a second coating on the second surface, and a third coating. The second coating: is an anti-reflection coating having a refractive index of 1.25-1.4; has a thickness of 105-200 nm; and comprises a porous portion and a dense portion that is present in contact with the substrate surface and has a thickness of 10-150 nm. The substrate comprises float glass with an iron content of less than or equal to 0.015 wt.%. The second surface of the glass is a tin side surface.    USE - The coated float glass substrate is useful in a photovoltaic module (claimed).    ADVANTAGE - The coated float glass substrate has good adhesion properties, improved anti reflection properties, reduced powder consumption and high durability and uniformity, reduces the potential for delamination of the conductive coating on the first surface, and improves the transmission of light into photovoltaic cells with improved efficiency.    DETAILED DESCRIPTION - The coated substrate comprises a substrate having a first surface and a second surface, a transparent conductive oxide coating on the first surface, a second coating on the second surface, and a third coating. The second coating: is an anti-reflection coating having a refractive index of 1.25-1.4; has a thickness of 105-200 nm; and comprises a porous portion and a dense portion that is present in contact with the substrate surface and has a thickness of 10-150 nm. The substrate comprises float glass with an iron content of less than or equal to 0.015 wt.%. The second surface of the glass is a tin side surface. The first surface of the glass is a gas side surface. The tin side surface is contacted molten tin during the float glass process. An INDEPENDENT CLAIM is included for a process for the deposition of a coating on a float glass substrate.    DESCRIPTION OF DRAWING(S) - The diagram shows a graphical view of transmission (%) against wavelength compared to the transparent conductive oxide coated substrate without the second coating.