Installation Guide

Connecting the Strings to the Safety Switch

StringsmaybeconnectedinparalleltothetwoDCinputpairsoftheswitch.Ifmorethantwo

stringsarerequired,theycanbeconnectedinparallelusinganexternalcombinerboxbefore

connectingtotheswitch.Whenconnectingmultiplestrings,itisrecommendedtorun

separatecircuitstotheSafetySwitchortopositionthecombinerboxneartheswitch.This

simplifiescommissioningbyallowingtestingandservicingneartheinverter.

To connect the strings to the safety switch:

1. Strip5⁄16''(8mm)oftheDCwireinsulation.

2. InserttheDCconduitintotheDC-sideknockoutthatwasopened.

3. 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. Earthing of module frames and mounting equipment

(equipotential bonding) is required per NEC.

4. ConnecttheDCwires:

CAUTION!

Ensure that the Plus (+) wire is connected to the + terminal and that the Minus (-) wire is

connected to the Minus (-) terminal connector.

Veillez à ce que le câble Plus (+) soit connecté au terminal + et que le câble - soit connecté

au connecteur terminal.

NOTE

If more than two strings are connected each should be properly fused on both DC+ and

DC- according to NEC690.35(B).

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.

l For single phase 3-7.6kW inverters-ConnecttheDCwiresfromthePVinstallationto

theDC+andDC-terminalblocks,accordingtothelabelsontheterminals.Usea

standardstraight-bladedscrewdrivertoconnectthewirestothespring-clamp

terminals,asdescribedfortheACconnectionofsinglephase3-7.6kWinverters

(connect the AC grid to the Safety Switch – single phase 3-7.6kW inverters:onpage38).

Chapter 4: Connecting the AC and the Strings to the Safety Switch

SolarEdge-Installation Guide MAN-01-00002-4.0