Abstract The Flat-Plate Solar Array (FSA) Project … the following goals: develop low-cost solar cell and module processes, design … Solar Panel Configuration … Photovoltaic Module Progress 75_% MIDULE PRICE 5 1975 198( Flat or non-concentrating module prices have dropped as module efficiencies have increased Prices are in 1985 dollars for large quantities of commercial products. 10 Z u.I IT 5 u_ t.lA U)[12< 10- MODULE LIFE 1 975 1986 Typical module lifetimes were less than 1 year but are now ...
The performance of individual solar cells was not consistent. Fabricated in batches, even the performances of those cells for use in space varied significantly. The best of these small rectangular”space cells”were assembled on panels, as closely packed as possible, to produce the maximum power per unit area. The lower performance cells were not used in spacecraft power systems because of high-performance requirements. Instead, these reject space cells were used for terrestrial applications. By that time, solar cells made specifically for terrestrial use had become competitive with reject space cells. These circular cells were made from one completeCzochralski (Cz) wafer. The cell processing was similar, but simpler and less expensive. For example, semiconductor industry-reject wafers were used. The result was that terrestrial solar-cell performance was less than space-cell performance. The challenge in 1975wastoreduce the cost of terrestrial solar cells, but still retain good quality and performance. The terrestrial solar cell evolved from the activities of the Flat-Plate Solar Array (FSA) Project, and differs appreciably (from alow-cost processing viewpoint) from the space solar cell. The activities of solar cell processing and module assembly, as described in this document, are separated into four technology sections: surface preparation, junction formation, metallization, and module assembly….
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