Green Collar Careers - Solar PV
Bill of Materials
The Solar Site Survey workbook includes
two worksheets for Solar PV materials:
- Solar PV BOM - identifies the primary electronic
- Solar PV Interconnect Table - identifies cables and
- Solar PV Mounting Rack - identifies the mounting and
Solar PV BOM
After you've finished the Site Survey and selected the kit
you'll be using, input the specific materials included in the kit in
the Solar PV BOM. Make sure that all utility specified and/or
approved material requirements are met.
Solar PV Interconnect
Cable Route Lengths should have been identified during the Solar
Site Survey. After you've selected the Kit and have identified
the number of panels and the voltage of the panels you'll need to
determine how many sets of panels will need to be wired in series
(panel to panel) and how many parallel runs will need to be made to
the Combiner Box. What you'll be doing is matching the DC
Voltage input requirements for the Inverter while maintaining the
most effective (and safe) use of wire between the PV Panels and the
First we'll make this point; the longer the run, the
lower the allowable current that a wire can carry. Due to the
cost of the connectorized PV panel cables it is strongly recommended
to mount the Combiner Box as close to the PV Panels as possible.
If this is on a roof top, mount the Combiner Box in the attic at the
closest safe point to mount it. If using a ground mounted rack
system, mount the Combiner Box under one of the panels and protected
from the weather. Not all Combiner Boxes are Outdoor rated.
If the Combiner Box is not outdoor rated mount it inside an Outdoor
rated power box panel with door available from your local building
Solar PV Mounting Rack
After you've completed the sketch for the rack & mounting system
insert the materials in the Solar PV Mounting Rack BOM.
Mounting Rack is usually erected from modular extruded aluminum
|End of a
typical rail channel. Note the grooves where the square
channel nut fits in to adjust to the span length required to mount
the solar PV panel.
channel nut used to slide in the channel groove.
can be mounted with threaded rod to set positions as required.