QRail Installation

BI 7.2.3-46
Jul-2019, Rev 4.2
BI 7.2.3-46
Jul-2019, Rev 4.2
24
6. Module Installation
6.1 Module Level Power Electronic Installation
If module level power electronics (MLPE) are to be used with the array and mounted on the rails, they should be installed
prior to installing the PV modules. There are two methods for attaching these components, either the Rail / MLPE
Attachment or the Rail/ Low Mount MLPE Attachment. The two options should be selected by the installer based on site
conditions, panel clearance, and system configuration.
Rail / MLPE Attachment Installation:

Insert the T-bolt and flanged nut through the mounting flange of the device to be
mounted to the QRail with the T-bolt below the mounting flange.

Insert T-head into the top channel of the QRail rail and, using a 13 mm wrench or
socket, tighten the nut to 15  -lbf (20 N-m).
Rail/ Low Mount MLPE Attachment Installation:

Insert the T-bolt on the base of the L-Foot into the downslope channel of the QRail
Rail and tighten nut to a torque of 16  -lbf (22 N-m)

Install the provided hex bolt into the mounting flange of the device and slot in the
L-Foot, Bolt facing downward, then install the provided flange nut
and torque to 16  -lbf (22 N-m)
Image 6.1.1
Rail/MLPE Attachment
Image 6.1.2
Rail/Low MLPE Adapter
1
If using non-nylon patched t-bolts tighten to 15  -lbf (20 N-m)
CAUTION
Use only 20mm long T-bolts when
mounting Module Level Power
Electronics (MLPE) to top of rail.
25mm long T-bolts increase the risk
of contact with the back sheet.