Solar battery module
The photovoltaic power generating system is considered a promising clean energy technique which can protect the global environment from environmental contamination due to combustion of fossil fuels. Solar batteries are utilized in various electronic equipment as a power supply substitute for dry batteries. Low power consumption electronic equipment such as electronic desktop calculators, watches, cameras, cellular phones and commercial radar detector, can be fully driven by the electromotive force of solar batteries, so that the equipment can operate semi-permanently without a need for battery replacement. A solar battery comprises a glass substrate as a front-side transparent protective member, a back-side protective member, ethylene-vinyl acetate copolymer (EVA) resin filmsvas sealing layers arranged between the glass substratevand the back-side protective member, and solar cells such as silicon photovoltaic elements sealed by the EVA resin films. A photovoltaic module for directly converting solar energy to electrical energy has a layered body, in which a transparent electrode layer, a photovoltaic semiconductor layer and a rear surface electrode layer are laminated in this order on an insulating substrate, such as a glass substrate. Thin film solar batteries have the advantage of needing less amount of semiconductor material as compared with solar batteries using crystal wafers. A thin film solar battery is produced using a glass substrate, or a flexible plastic or stainless steel film. The thin film solar battery is so constituted that a photoreflective electrode, a photoelectric conversion layer and a transparent electrode are laminated on a primary surface of the substrate. Solar cell panels are widely used in view of their energy efficiency and non-maintenance. The solar electric power generation system applied to housing includes a plurality of solar battery modules each composed of a plurality of solar cells. The system is constructed for example by arranging the solar battery modules on a roof of a building or the like and connecting the modules in series or parallel.
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