DOUBLE DUTY SOLAR PANELS MANUFACTURER: SANYO
S
anyo’s HIT (Heterojunction with Intrinsic Thin layer) Power 220A module collects sunlight from both sides of the panel. The double glass means that each panel generates up to 30% more energy than a single-sided PV panel, depending on how much reflected light is available. The 220A boasts a certified
cell efficiency of 19.8%, and module efficiency of 17.4%, among the highest available from any solar cell. The two-sided panels provide both shade and power. Each panel produces up to 220 watts and has a five-year full guarantee, with a 20-year guarantee of 80% or better efficiency. It’s also more efficient in high temperature climates
Si single crystal Si HIT single crystal Si HIT polycrystal Si polycrystal Si ribbon CIS
CdTe
Amorphous Si Graetzel Polymer
★ ★ ★
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 192021 2223242526 PV Module Efficiency (%)
RECYCLED GLASS TILE MANUFACTURER: STARDUST GLASS
M
anufactured in Portland, Ore., Stardust Glass tiles are hand crafted, so each installation has a unique, crafted look. The com- pany is also serious about its environmental impacts. All tiles are made using 87% to 97% “pre consumer” recycled glass. In other words, it’s made of materials that are part of what would normally be part of the waste stream of industrial operations,
such as glass cutoffs. Most companies using recycled glass in their products lean toward this material as opposed to post-consumer glass, typically because the former is cleaner and easier to deal with in the plant.
www.stardustglasstile.com/
RECYCLING: REALITY CHECK Asphalt pavement
Paper/paperboard Scrap steel
Compost
Concrete pavement Metals
Plastics Glass
If you think the United States is well on the road to becoming a conscientious land of reuse and recycling, think again. Aside from asphalt and steel, other materials such as glass and especially plastics tend to end up in landfills, not back in use. (Image:
www.gahotmix.com)
■ Large Area Module Efficiencies ★ Best Laboratory Results ★
★ ★ ★ ★ ★ SOLAR CELLS KEEP
GETTING BETTER Who can design the most efficient solar cell? The progress so far in improving electricity conversion has been slow and steady, not sudden and groundbreaking. But new technologies such as HIT are outperforming most other PV processes. (Image: www.
solarnavigator.net/solar_cells.htm)
than typical PV panels.
http://us.sanyo.com/ HIT-Power-Double
0102030405060708090
38
GreenBuilder September 2010
www.greenbuildermag.com
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