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Step 1: Mounting and Grounding the Power Optimizers For each of the power optimizers1: 1. Determine the power optimizer mounting location and use the power optimizer mounting brackets to attach the power optimizer to the support structure (See Figure 5). It is recommended to mount the poweroptimizer in a location protected from direct sunlight. For frame-mounted power optimizers follow the instructions supplied with the optimizers, or refer to https://www.solaredge.com/sites/default/files/installing_frame_mounted_power_ optimizers.pdf. 2. If required, mark the mounting hole locations and drill the hole. CAUTION! Do not drill through the power optimizer or through the mounting holes. The drilling vibrations can damage the power optimizer and will void the warranty. ATTENTION! Ne pas percer à travers la optimiseur de puissance ou ses trous de fixation. Les vibrations qui en résulteraient peuvent endommager la optimiseur de puissance. 3. Attach each power optimizer to the rack using M6 (1/4'') stainless steel bolts, nuts and washers or other appropriate mounting hardware. Apply torque of 9.5 N*m / 7 lb*ft. 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 methods2 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. l 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. 1Not applicable to smart modules. 2These 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:InstallingthePower Optimizers SinglePhaseInverter with HD-WaveTechnologyInstallation MAN-01-00306-1.1 19 Figure 5: Power optimizer installation and grounding using a star washer l 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 Figure 6: Power optimizer installation and grounding using a grounding plate l 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 7 Figure 7: Power optimizer grounding terminal 5. Verify that each power optimizer is securely attached to the module support structure. SinglePhaseInverter with HD-WaveTechnologyInstallation MAN-01-00306-1.120 Step1:MountingandGroundingthePower Optimizers 2110 W 7th St - 2017778512/28/22