Application Note: Grounding Optimizers

2
Figure 2: Groundng plate
3 For power optimizers mounted on un-grounded (non-metallic) structures, or in case the star washer or the grounding plate
cannot be used: Use the SolarEdge grounding lug with an equipment-grounding conductor. After connecting the lug to the
power optimizer, connect the equipment-grounding conductor to the grounding terminal. Tighten the screws connecting the
power optimizer to the rack and the grounding terminal screw with a torque of 9.5 N*m / 7 lb*ft.
The grounding terminal will accept a wire size of 6-14 AWG and must be sized for equipment in accordance with NEC Table
250.122.
The grounding lugs may be purchased in bulk from SolarEdge (part number SE-GNDLUG-100). The lug kit includes four stainless
steel parts to prevent corrosion of the copper grounding conductor and of the aluminum housing of the power optimizer.
Figure 3: Grounding lug