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» Learn about Photovoltaics » Grid-tied » Components
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Components
Modules
The minimum sized grid-tied system will typically consist of at least 4 modules. The
modules,
or
panels,
are typically connected together in series to reach a desired input voltage for your grid-tied inverter.
This input range can vary from 100 to 550 Volts DC. Most modules intended for grid-tie use will vary from
150 to 250 watts and produce 26 to 60 Volts DC. Details on specific modules can be found on our
Products page.
Grid-Tied Inverters
Grid-Tied inverters convert the DC electricity produced by your modules into the AC electricity used in
your home. These inverters do not require batteries to operate, making them much more efficient and
cost effective. The inverter works by matching its voltage and frequency to the utility grid. If you
are not using all the power being produced by your system, the inverter will push the excess power onto
the grid to be used by someone else. Additional information can be found on the
Products page.
Mounting Systems
There are several different types of mounting systems available for your array depending on the location
of the installation. The most common type of mount for a grid-tied application is a rail based system
that mounts directly on the roof. If you have a pitched roof that is generally facing south, this will
typically be the most cost effective option. These systems may include flashings and brackets for
water-proof attachment to just about any type of roof including asphalt shingle, metal, and tile. If
the roof is not an option for you, there are ground and top of pole mounts available. You can also
integrate the modules into a shade or parking structure.
Disconnects
Most utilities will require a separate DC and AC disconnect for your system. These are typically
inexpensive NEMA 3R switches rated for 600VDC or 240VAC. They can come fused or unfused based on
the application.
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