Outback Power Systems GS4048A Operators Manual - Manual (Page 39)

Operation
900-0161-01-00 Rev A 37
without being stacked as long as it is wired independently.
 The GS8048A can be parallel-stacked with the GS4048A.
 Although stacking allows greater capacity, the loads, wiring, and overcurrent devices
must still be sized appropriately. Additional terminations or bus bars may be
required. Overloading may cause circuit breakers to open or inverters to shut down.
Parallel Stacking (Dual-Stack and Larger)
In parallel stacking, two or more inverters are stacked to create a single, common set of AC outputs.
 All inverters share a common input (AC source) on both L1 and L2. The inverters run loads on common
L1 and L2 output buses. The master inverter provides the primary output. The slaves are connected to the
same L1 and L2 outputs and assist the master.
 The slave outputs are controlled directly by the master and cannot operate independently.
 Slave inverters can go into Power Save mode when not in use. The master will activate individual slaves
based on load demand. This reduces idle power consumption and improves system efficiency.
 Up to ten inverters may be installed in a parallel arrangement.
Figure 8 Example of Parallel Stacking Arrangement (Three Inverters)
24 kVA
120/240 Vac
8 kVA
120/240 Vac
8 kVA
120/240 Vac
8 kVA
120/240 Vac