SolarEdge SEK-I Series Installation Manual page 45

44 Connecting the PV Strings to the Synergy Manager
Synergy Manager (see labels DC boards).
CAUTION!
The DC board has three pairs of DC terminals - each pair is connected to
single Synergy Unit (Left, Center and Right).
When installing a system with more than 3 strings per a single Synergy Unit
(whether connected directly or via a combiner box), fuses are required. In
SolarEdge system, 25A fuses must be used.
4. Remove the nuts from the DC terminals.
5. Strip the wire insulation from the end of the DC wires.
NOTE
Before connecting aluminum wires to lugs:
a. Remove Oxide from the exposed wires.
b. Clean with Isopropyl alcohol (IPA).
c. Coat wires with an electrical connection grease/material.
6. Crimp the lugs on the DC wires and use heat shrink to insulate the lug barrels.
CAUTION!
For aluminum wires, USE ONLY Bi-metal lugs or aluminum lugs that support
copper and aluminum conductors.
For copper wires, USE ONLY copper tin-plated lugs.
Three Phase Inverter with Synergy Technology P/N: SExxK-xxxxIxxxx SExxK-xxxxIxxxx
Figure 21: Attaching lugs to the DC wires