Power save levels, E 27, Operation – Outback Power Systems GS8048 Operator Manual User Manual
Page 29
Operation
27
In parallel stacking, two or more inverters are stacked to create a single, common 120/240 Vac bus.
The master provides the primary output. The slaves are connected to the same output and assist the master.
The slave inverters can be programmed to activate on demand, reducing idle-power consumption. They will
remain off until the loads exceed a certain threshold.
A two-inverter system can continuously power 16 kVA of loads.
Up to ten inverters may be installed in a parallel arrangement.
Figure 7 Example of Parallel Stacking Arrangement (Three Inverters)
Power Save Levels
Each inverter consumes approximately 30 watts of idle power while it remains on, even if it is not
actively inverting or charging. The Power Save function allows the option to put part of a parallel
system into a quiescent state known as Silent mode. This mode minimizes the idle consumption. The
inverters will come on again when the loads require power. (The term “Silent” is also used in an
unrelated context during battery charging. See page 22.)
The GS8048 has two modules. The modules are controlled individually. The Power Save function will
activate one module at a time, making an additional 4 kW of power available for every load increase of
approximately 2.5 kW. Additional load increments of approximately 2.5 kW will activate additional modules.
When the load decreases to a lesser wattage (as detected by the master), the modules deactivate and return
to Silent mode.
The first module in the master does not enter Silent mode. It remains active unless specifically turned off.
The order in which additional modules activate (or return to Silent mode) is controlled by programming in
the MATE3. The inverters are given a “rank”, or level number. Lower rank numbers activate when lesser
loads are applied. Higher ranks only activate when the load increases to a high level.
IMPORTANT:
It is highly recommended to use the MATE3 Configuration Wizard to set up this function.
It is essential to set the slave Power Save Levels in sequential order. Failure to set them
up correctly will cause erratic system behavior. The Configuration Wizard automatically
programs the correct priorities. (See the MATE3 Owner’s Manual.)
24 kVA
120/240 Vac
8 kVA
120/240 Vac
8 kVA
120/240 Vac
8 kVA
120/240 Vac