Abstract: The invention relates to a solar cell module comprising electrically interconnected solar cells with front and backs, a transparent first layer running along the front sides, which is covered on the front laterally by a transparent cover, as well as a second layer running along the backsides, which is covered at the back by a second cover. In order to prevent and/or minimize a potential-induced reduction to a large extent and/or obtain an improved stability vis-à-vis thermo-cycling, it is suggested that first layer consists of a first polymer material and the second layer consists of a second polymer material deviating from the first polymer material and the fact that specific resistance is larger p1 of the first material is greater than specific resistance p2 of the second material.

Abstract: The improved photovoltaic module contains a solar cell made of metallic silicon, which is embedded in at least one embedding material, and a corrosion inhibitor. Preferably the corrosion inhibitor is an organic compound, which has at least one nitrogen atom. As a result, the photovoltaic module according to the present invention has an extended service life, since it withstands corrosive influences.

Abstract: For fastening the contact strip (8) to the back electrode layer (4) of a photovoltaic module, the back electrode layer (4) is provided on its outer side with a tin-, copper- and/or silver-containing contact layer (12). Subsequently the contact strip (8) provided with solder (17) on the joining surface is connected to the back electrode layer (4) by soldering. The contact layer (12) causes good adhesion of the back surface encapsulation material (13) to be obtained. A barrier layer (11) prevents alloying of the tin-solder with the layers (9, 10) of the back electrode layer (4).