Installation Guide
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 3-
wire Grid
on page 49, before connecting the AC and strings to the Connection
Unit.
For recommended circuit breaker size per model, refer to
Determining the Circuit
Breaker Size
on page 99.
Connecting the ACGrid to the Connection Unit
Figure 26: 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.
Three Phase Inverter with Synergy Technology Installation MAN-01-00401-1.5
44 Chapter 4: Connecting the AC and Strings to the Connection Unit