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FILM TECHNOLOGIES 39
Figure 2.18 Application of BIPV as window canopy in CalTrans
building, los Angeles, California. Photo courtesy of Atlantis Energy Systems.
■ The orientation of the roof should preferably be facing south (east over south to west).
■ The photovoltaic area exposure to sunlight should always remain unshaded.
■ The PV-mounted area must be sufficiently large and unobstructed.
■ For optimum efficiency the PV support rafters or platform must have a 20-degree tilt.
Potential Annual Power Production Considering a system with optimal orien-
tation and an installed power of 1 kWp (kilowatt peak), which corresponds to an area
2
of 9 square meters (m ) an average annual yield of around 980 to 1200 kWh plus can
be anticipated in most parts of North America. Under adequate geoclimatic conditions
a PV system conforming to this system configuration will have an annual power pro-
2
duction capacity of about 120 to 128 kWh/m .
