Installation Guide

For 3NA series power optimizes, SolarEdge recommends mounting the power
optimizer on a rail with the smooth side facing out, so that the power optimizer
body will prevent its rotation.
4. Use the following methods
(1)
to ground the power optimizer:
WARNING!
The metallic enclosure of the power optimizer must be grounded in
accordance with the requirements of the local and national codes.
AVERTISSEMENT!
L'enceinte métallique de l’optimiseur de puissance doit être mise à la terre en
accord avec les régulations locales et nationales.
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 torque of 9.5
N*m / 7 lb*ft. See Figure 5 .
Figure 5: 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 6 .
(1)
These methods have been evaluated by a nationally recognized testing laboratory as part of the optimizer evaluation.
The SolarEdge-supplied grounding lug kit has been evaluated only for use with SolarEdge power optimizers. It is not
intended or listed to be used as a general purpose grounding lug with other electrical equipment.
Chapter 2: Installing the Power Optimizers 23
Three Phase Inverter with Synergy Technology Installation MAN-01-00401-1.5