b"Integrating P 1 oltaits Ontogelope Shoto, Buildin Env urfaces Continued from page 11 Wall and Window Systems There are aof new wall and window PV systems. The key limiting number factorwall and window application is the building placement relative to with the sun. South, southeast, and southwest walls p the most power. roduce ica siWindow systems are typ lly alicon wafer or thin-film celllaminated between two sheets of glass and are semitransp t. Solar window applicaarentions include win glazing, cu walls, atriums, and skylights. dowrtain Solarllintegrating g modules to cu walls wa systems vary fromlassrtainto applying thin-filmwith adhesives to adheremodulea modulesthetowall surface.lar application system created by SolarSeal Technologies Another soleelastomeFigure B - T. Clear Solar LG Insulated Roof Panel.uses thin-film, semiflexib modules withric coatings for integratingsolarmodulesontoEIFSwalls, tilt-wallconcretewallpanels,and masonryll wa systems. Curr tly,andsystems areialized. Keep watching en wallwindowvery specas the pricingsolar systems continues to drop,more building wall and ofand window systems sta to incorporate solar into more traditionaland winrtwall (See10dow building products.Figure.) Photov Roofsign oltaicDeDesigning a PVtem for B V is alex process,iallyrsys IP comp espec fo roofing. The solar in for the most pa , hasindependently of the dustry,rt grown Figure 9 -Solar shingles by Open Energy.roofing in In the past, it was generallylieved that the installation of dustry.berack-mounted glass PVs on aiden l shinglerequired little more res tia roof non-glass solartalline silicon PVlean old roof industrythan drilling aholes in the roof, cau ing around thep mounts and crys modu withclas fewlk su port TGUARDG)the sic, the T.Clear (LG) LIGH and T.Clear (H HEAVYGUARDwiring penetrations, and installing flashings aroundequipment suppo insulated roof panel.mounts on a-slope roof.this day,in thelar industry do no low TomanysoT solar PMR panels separate the membrane roof system from the solar he array.ngsolar insulation panels over the roof system protects the Placi the membrane by maintaining atemperature. T reduces the nearly constanthis harmful effects of freeze-thaw cycling and exposure to harsh UV, lowers hea a cooling costs,extends the service lifethe prot roof tingndandofected (See membrane system.Figure 8.) Steep-Slope Systems Glass solar modules have been used on steep-slope residential roofs for years. The flat solar panelseasy to install,only aroof pen Figure 10-The main elevation of Op TIC (Opto-electronics Technology and Incubation Cenarerequiringfew etrations to run the wiring. However, glass PV modules are considered bytre), United Kingdom, showing thebusiness center and 1,00Dm2 PV wall array. cantilevered some to be an u roof. With an expected service of 30 years nattractivesystemand a higher surface temperature, glass modules will outlast most roof sur understand that changing the roof's use may voidwarran unless the thety hererenumbercompetentthe faces,especially those with asphalt shingles. T a aof newwork is completed by ainstaller and is approved bymanufacalterna PV roofing products that have incorporated active solar materialsturer. tive into conventional roof products to create true BIPV roofing products.With the introductionnew roof systems that combine trad l roof ofitionaNew solar shingle and tile products use either thin-film or crystalline sil productsPVs,designersfing contractors must learn a withroofand roo new icon for asurface. Aof new solar tile modules that canset of technical skills. Solar in grators andsolar design consultants are solar-activenumberteinter w h a (;.oncr roof tiles areT SunTile isbecoming better educated about roofing technologies. Withincreasing faceit fl t,eteavailable.hePower Sunthe high thatete serraysneed a-efficiency solar panelblends invisibly into concr -tile roofs. GEu of solar a and theto create more energy-efficient and sustainSolar makes atile with apower of 55at 8.4 volts andaable buildings, both the solar industry and the conventional construction solarpeakwattshas unique interlockingfor concrete-tile applications. SharpSolar offersproduct industry need to workand learn from one another. designtogether polycr inemodules withvolts of output. Open Energy makesToday, there are several BIPV application optionsr low-slope r sysystall silicon62fo oof a polycrystalline, tile-type module that comesin brown, red,andblack.tems: Atlantis Energy Systems manufactures atype tile that works well with slate-flat tiles and slate roofs. (See Figure 9) 12"