Installation Manual

Chapter 4: Connecting the AC and Strings to
the Connection Unit
TheSafetySwitchintheConnectionUnitdisconnectsallungroundedDCconductorsincompliancewith
theNationalElectricCode(NEC;SpecificallyNEC690.35,whichaddressesungroundedPVarrays).The
ConnectionUnitisratedtothemaximumoperatingconditionsoftheinverter.
Invertersofdifferentmodelsmightbeequippedwithdifferentsizes/typesofterminalblocks.
NOTE
If connecting to a Delta Grid perform the 'To set the inverter for 208V delta grid connection' procedure
as described in Setting the Inverter to Support 208V Delta Grid on page 36, before connecting the AC
and strings to the Connection Unit.
Connecting the ACGrid to the Connection Unit
Figure 23: Inside the Connection Unit
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.
NOTE
It is recommended to connect communication connections (Setting Up Communication on page 56)
before connecting the AC, for easier access to the communication board.
Connecting the AC Grid and Grounding to the
Connection Unit
ThissectiondescribeshowtoconnecttheACgridandgroundingtotheConnectionUnit.
NOTE
If opposite polarity DC conductors are routed in the same conduit, 1000V rated cables must be used.
Chapter 4: Connecting the AC and Strings to the Connection Unit
Three Phase Inverter with synergy technology Guide MAN-01-00401-1.1
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