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This thin-film photovoltaic roofing is now available in easily shippable, 16-inch-wide
rolls. It's a peel and stick laminate. You just unroll the sheet, lay it face up on a flat
metal roofing panel and press it onto the panel while your assistant pulls the
protective sheet off the sticky backing.
Thin-film sheets perform better in high temperatures and in partly shaded conditions,
and they require 100 times less silicon, which means thin-film PV is expected to
become less expensive than crystalline as production capacity expands over the next
few years.
The new metal roof is 24-gauge steel. It should last at least 50 years, and the steel
can be recycled, making it an excellent sustainable choice for any building.
After the roofing panels are installed, they are wired together and connected to an
inverter. The inverter converts the direct-current power generated by the solar panels
to standard 110-volt alternating current. The AC current flows through the new
meters installed by the utility company and into the house.
When the house needs more power than the PV is producing, the utility grid will kick
in to make up the difference.
The cost of the main components is $7,200 for the PV laminate and $2,500 for the
inverter and switches. This doesn't include the cost of the metal roof or the electrician,
but the additional expense can be offset by a $2,000 Federal Solar Tax Credit and
State incentives.
The photovoltaic laminate roof in the video has the capacity to produce 1.8kW (1,800
watts). In full sun the system delivers around 1,500 watts which is 83% efficient.
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Photovoltaic Roof | Photovoltaic Roofing Video
The solar photovoltaic roof being installed in the video is made possible by the
invention of thin-film photovoltaic (PV) laminates that can be bonded directly onto
metal roofing panels.
Unlike crystalline PV material, there's no need for obtrusive racks and heavy,
expensive glass. Instead, unbreakable thin-film PV is produced using amorphous
silicon, encapsulated in Teflon and other polymers.