The PV Installation involved mounting the 140 working modules plus "filler" modules to the copper standing seam roof. The 15 inch space between the seams provided the basic dimension that the modules had to fit and maintain a low profile. Also part of the installation decision was to obtain an aesthetically pleasing look (no sparkly blue or round cells!) yet with high efficiency. The Siemens ST-40 CIS modules fit the bill. With a 13 inch width dimension, a flat black appearance, and an efficiency approaching twice that of amorphous silicon, the Siemens CIS-ST-40 and -20 modules were the right solution. The mounting of the modules to the copper standing seam roof in the highly corrosive, wet, and windy environment of Oregon coast made careful selection of materials crucial. Brass clamps called S-5-B were used, along with Z-shaped copper brackets and stainless steel or brass bolts, to assure a long-lived trouble free installation. Using the clamps meant that no roof penetrations were needed. High clamp strength and conservative over-design in the number of clamps employed, will keep the modules solidly attached even in winds over 120 mph. The installation was challenging and complex, given there were 13 roof facets facing three directions, upon which modules were mounted. Thirty-five circuit strings of 4 module-ST-40 strings and 4-module ST-20 strings comprised the array. With roof tilts of 22-30 degrees, there are 1840 W of modules on East facing facets, 2400 W on West facing facets, and 960 W on South-facing facets, for a total of 5200 W DC (all ratings STC).