b'Integrating Photovoltaics Onto Building Envelope Smfaccs Continued from page 7 at $2.75 to.25/watt, cost less than silicon modules. Module cost depends $4on the type of semiconductor material used and the module\'snstruction co(glass or polymer). 3Power production per sq ft varies am manufacturong nlers.U iketheroofindustry,withcost persquare,thesolarindustry expresses module and a ay insta ation cost by the watt DC. rr llBuilding-Integrated Photovoltaic (BIPV) Systems Building Integrated Photovoltaics is abuilding techn concept. newology B involves integration of PV modules into the building envelope by incorIPV conventional porating them inbuilding products, such as the roof, windows, or walls. BIPV is both the building envelope surface and the building energy source. BIPV Advantages Figure 2 -Grand Valley State University displaying Uni-Solar, flexible thin-film PV modules. Ad g\'s BIPV system is connected with thel u lity grid, buil in owner loca tiand, with net metering, it can export surplus energy to the utility for later Thin-film PV materials arein both glass-encapsulated andle use. The bu becomes aof its surplus powerion. usedflexib ildingdistributorproductmembrane solar modules.Net metering banks or deposits that energy with acompany. The utility Comparing thin-film pvs to traditional silicon modules:power storage system is essentially free.T n-film PV modules gener less p ersq ft (lower powerity)Both the building own and the utilityit, as on-site solarr hi ateow perdens erbenef powe procompared to crysta ine silicon and caneto five percent moreduction isgreatest during times of peak energy need for both ll produc uptypically powerina solar day. Crystalline silicon\'speakpowerproductionisbu n and p companies. T PV system reduces energy costs for ildi gsowerhe th modulesild ergy between 10:00 a.m. and 3:00 p.m., whilein-filmcan generatethe bu ing owner, and the exported surplus solar en provides addipowerthe day.tional power to theutility grid during the timeof its greatest energy throughoutThin-filmproduce more power during low-light (early morning anddemand. PVs lateand overcast conditions compared to crystalline silicon. 2A The utilitycan main needed power production capacity withafternoon)companytain solar module peak-power output is measured at 1 n withsunout the ca l investment of building new powerion plan . 2:00oonthepita generat tsdirectly overhead. The building o can dr -metered power at night, when wneraw back the net Thin-film P produce 5 to10 wa of powerper sq ft onaverage,electricaltend tolower, reducing powert. Vsttscostsbecosdepending on the type of sem material used.P taic systems cantheildin ener source in iconductorhotovol becomebu g\'s primarygyHighrooftopoperatingtemperature haslesseffecton thin-filmsolarthe event of afailur and en can beusing batterpowere,ergystored onsite power output compared to standardsilicon. Crystalline siliconies for. crystallineemergency backuplesce modu start losing power output on PV module temperature exceeds 25\'C.Roofing and BIVPT modules\' power output is less affected by solar shadinga Placing rigid solar PV roof panels as aor rooftop-equ hin-film(sh d stand-aloneipmentows) than crys mounted power module array has been around since the invention of solar talline silicon. Solar modulecan be 50 to 65tarThin-film,PV cells. T creative idea of integrating thin-film PV modules into ang costpercen ofsola array.PVs heroofisystem dates back to the 1 On recently, with the commercial devel-980s.ly METECKSy. ALDUPPLCOM YOURONESTOP METAL DECKSHOP! ANYSIZE. 800-894-77Midwest Region 41 877-668-3325 Southeast Region. TJME. ,,,"All steel deck manufactured by Steel Deck Institute Members" 81111'