Installation Guide

Installation
900-0168-01-00 Rev C 33
Three-Phase Stacking
In three-phase stacking, inverters create three separate 230 Vac
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outputs in a wye configuration.

The three outputs operate independently of each other. The inverters on one output cannot assist another.
Several inverters can be installed in parallel to power all 230 Vac loads on that output.

The output of each inverter is 120° out of phase from the others. Any two outputs produce 400 Vac
between them. The outputs can be used to power three-phase loads when all inverters work together.

Up to nine inverters, three per phase, may be installed in a three-phase arrangement. (The wiring drawing
on the next page shows only one inverter per phase.) All inverters must be the same model.
Figure 25 Example of Three-Phase Stacking Arrangement (Three Inverters)
Figure 26 Example of Three-Phase Stacking Arrangement (Nine Inverters)
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Output voltages may vary with regional voltage standards.
2.0 kVA 230 Vac
2.0 kVA 230 Vac
2.0 kVA 230 Vac
2.0 kVA
230 Vac
6.0 kVA
400 Vac
2.0 kVA
230 Vac
2.0 kVA
230 Vac
LOAD PANEL
OR
CP
hase Master
BP
hase Master
Master
C Phase
Master
B Phase
Master
Master
2.0 kVA 230 Vac
2.0 kVA 230 Vac
2.0 kVA 230 Vac
2.0 kVA 230 Vac
2.0 kVA 230 Vac
2.0 kVA 230 Vac
2.0 kVA 230 Vac
2.0 kVA 230 Vac
2.0 kVA 230 Vac
Slave
Slave
Slave
Slave
Slave
Slave
6.0 kVA
230 Vac
6.0 kVA
230 Vac
6.0 kVA
230 Vac
LOAD PANEL
18.0 kVA
400 Vac
OR