SolarEdge StorEdge Solution with Backup Installation Manual page 28

Chapter 2: Installing the Power Optimizers 27
For mounting on a grounded metal rail: Use the provided 5/16'' stainless steel
grounding star washer between the railing and the flat side of the mounting
bracket. The grounding washer should break through the anodize coating of the
railing to ensure low resistive connection. Apply a torque of 9.5 N*m / 7 lb*ft.
Figure 3: Power optimizer installation and grounding using a star washer
For mounting on rails with sliding nut fasteners: If the star washer cannot be
used, use the SolarEdge grounding plate (purchased separately) between the
railing and the flat side of the mounting bracket. Use mounting specific
hardware as needed. Apply torque of
9.5 N*m / 7 lb*ft. See Figure 4 .
Figure 4: Power optimizer installation and grounding using a grounding plate
For mounting on un-grounded structures (such as a wooden structure): If the
star washer or the plate cannot be used, use the SolarEdge grounding lug
(purchased separately) with an equipment-grounding conductor according to
the supplied instructions. The grounding terminal accepts a wire size of 6-14
AWG, and must be sized for equipment grounding per NEC 250.122
requirements. Tighten the screws connecting the power optimizer to the frame
and the grounding terminal screw. Apply torque of 9.5 N*m / 7 lb*ft. See Figure
5 .
StorEdge Solution with Backup MAN-01-00262-1.5