Installation Guide

To connect the strings to the Safety Switch:
1. Equipmentgrounding:ConnecttheDCequipmentgroundconductortotheequipmentgrounding
terminalblockintheSafetySwitch.
NOTE
Functional Electrical Earthing of DC-side negative or positive is prohibited because the inverter has
no transformer. Equipment grounding of exposed conductive surfaces in the array is required per
the NEC.
2. InserttheDCconduitintotheDC-sideopeningontheSafetySwitch(leftsideatthebottomofthe
SafetySwitch).
3.
ConnecttheDCwirestotheDC+andDC-terminalblocks,accordingtothelabelsontheterminals,
connecttwowires(DC+andDC-)perstring:
a. Useastandardflat-bladescrewdrivertoconnectthewirestothespring-clampterminals.The
screwdriverbladeshouldfitfreelyintheterminalopening.Toolargeabladecancracktheplastic
housing.
b. Insertthescrewdriverandfirmlytiltittopressthereleasemechanismandopentheclamp.
c. Insertthewireintothetopopening.
d. Removethescrewdriver–thewireisautomaticallyclamped.
CAUTION!
Ensure that the Plus (+) wire is connected to the + terminal and that the Minus (-) wire is connected to
the Minus (-) terminal connector.
ATTENTION!
Veillez à ce que le câble Plus (+) soit connecté au terminal + et que le câble - soit connecté au
connecteur terminal.
NOTE
For systems with four PV strings per unit or more, fuses may need to be installed in
both the positive and negative conductors as required by NEC Article 690.9. For more
information, refer to the Technical Note “String Fusing Requirements in SolarEdge
Systems” at http://www.solaredge.com/files/pdfs/string_fusing_requirements.pdf.
NOTE
SolarEdge's fixed input voltage architecture enables the parallel strings to be of different lengths.
Therefore, they do not need to have the same number of power optimizers, as long as the length of
each string is within the permitted range.

Figure 21: DC Spring-clamp terminals
Chapter 4: Connecting the AC and the Strings to the Safety Switch
-Single Phase Inverter with HD-Wave Technology Installation MAN-01-00541-1.0
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