Ballast mounting system for solar panels on a flat roof. Number of panels in a row: 3 solar panels in a row, 4 solar panels in a row; Placement of solar panels: Album placement, Book placement

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Ballast mounting system for solar panels on a flat roof. Number of panels in a row: 3 solar panels in a row, 4 solar panels in a row; Placement of solar panels: Album placement, Book placement