Solar Training Videos – MOUNTING PV ARRAY FRAMES

Solar Training Videos – MOUNTING PV ARRAY FRAMES


[♪ Music ♪] You arrive on site, now you have the job of
installing the array mounting frame so it complies with all the necessary requirements
and will not fly off the roof in strong wind. Hi, my name is Michael and I am going to run
you through some essential points to look at when mounting a solar PV array frame. First, you need to undertake a complete site-specific
risk assessment. Remember when working on the roof you must
comply with the height safety requirements and wear a harness or use other fall protection.
Then check for correct location on roof. It is also important to check for any shading
from surrounding environment or neighbouring houses. If the mounting system you are about to install
does not come with an engineering certificate and detailed installation instructions, do
not use it. It will not comply with Australian standards,
so you won’t be able to sign the job off. [♪ Music ♪] First off you will need to measure the available
roof area to see if the system can fit on the roof. Before stepping onto roof, the roof
structure needs to be checked for any signs of defects. This may be done by removing a
couple of roof tiles and checking to see if roof trusses are deteriorated. Also check
strength of roof tiles by removing a few tiles and looking at the underside to see if there
are any signs of weakness or signs of deterioration. Once you have checked the timbers and supports
are in good condition, you need to measure the available roof space. You will also need
to check under the roof space to see whether the battens you plan to mount to are the right
size according to the requirements of the PV array frame engineering certification. [♪ Music ♪] [♪ Music ♪] [♪ Music ♪] [♪ Music ♪] [♪ Music ♪] [♪ Music ♪] [♪ Music ♪] [♪ Music ♪] [♪ Music ♪] [♪ Music ♪] Now the big question, how will you fit the
array frame on the roof to meet Australian Standards? If the design has been done correctly, you
will have the layout in your documentation, however, it is advisable to measure again
to confirm the design is accurate. You will need to ensure that the frame is going to
fit on the roof without compromising any of the installation requirements. Now that you have done your roof checks, it’s
time to check how many mounting points are required to comply with the Australian Standard
on Wind Loads. The Standards tell us that Australia has a number of different wind regions.
It is important that you know that each wind region has different requirements for mounting
of PV arrays. PV array frames should be wind rated for the site-specific installation. You will need to check the manufacturer’s
specifications as some frames are not suitable for use in high wind or cyclone regions or
they may require additional attachments. Now that you have your roof area measurement,
you need to work out the wind zones on the roof. If you are outside this zone, you may
not be able to install the panels in this area, or there may be a different spacing
required. You also need to know how many modules per
row, how many rows that are required for the system. Make sure that your modules do not overhang
the ridges or edges of the roof. Wind loading on the panels increases as they
are installed closer to the roof edge. PV modules and mounting systems may not withstand
the additional force of the wind and may fly off. Using the manufacturer’s instruction manual,
work out how many mounting points are required. Make sure you use the correct chart for the
roof type and wind region. [♪ Music ♪] So now you have worked out how the mounting
system will fit on the available roof area using the right number of mounting points,
you can get to work on the roof. [♪ Music ♪] [Sound fx: grinding, hammering] [Sound fx: drilling] The Australian Standard for the installation
of PV arrays requires that all mounting systems are connected to the protective earthing system
of the electrical installation. You must use an approved method of earthing
the rails and modules. [♪ Music ♪] [Sound fx: drilling] Now the job is done. You should have a securely fixed PV array
which meets manufacturer’s instructions and Australian Standards. Stand back and admire the good job you have
done. [♪ Music ♪] Now just to re-cap, remember the following
when installing PV array frames: Check the mounting system has an engineering
certificate, valid for Australian conditions and Australian Standards. Check the Australian Standards to work out
the wind region that you are installing in. Measure the roof area and work out roof zones. Check the roof battens. Don’t extend over roof line or capping. Check manufacturer’s instructions for spacing
on roof mounts. Use a good earthing system. And work safely. [♪ Music ♪] [Singing: And the world is made of energy] [and the world is electricity and the world…
(music fades out)

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