
Setting the Inverter to Support 208V 3-wire Grid
SolarEdge inverters that support the 208V 3-wire grid are equipped with two fuse
holders and a fuse in each unit. The position of the fuse configures the AC grid
connection: 4- wire or 3-wire grid connection. By default, the fuse is located in the 4-
wire fuse holder of the inverter, and in the 3-wire fuse holder there is a plastic dummy
fuse.
To set the inverter for 3-wire grid connection, you must move the fuse from the 4-wire
fuse holder, marked as Y GRID, to the 3-wire fuse holder, marked as
∆
GRID (see
21).
To set the inverter for 208V 3-wire grid connection:
NOTE
Perform this procedure for all inverter units.
NOTE
Perform this procedure before connecting the inverter to the AC grid.
1. Remove the inverter cover: Open the inverter cover’s six Allen screws and carefully
pull the cover horizontally before lowering it.
2. Identify the fuse locations and the markings as described in Figure 21.
Figure 21: Fuse locations and markings
3. Remove the dummy fuse from the 3-wire grid fuse holder and set it aside.
4. Move the fuse from the 4-wire grid fuse holder to the 3-wire grid fuse holder.
5. Place the dummy fuse in the 4-wire grid fuse holder.
6. During system setup, set the country to the appropriate 3-wire grid option. Using
the non-3-wire setting may result in incorrect system operation.
Chapter 4: Connecting the AC and the Strings to the Safety Switch
43
Three
Phase
System
Installation
Guide
MAN-01-00527-1.
2