Outback Power Systems GS4048A Operators Manual - Manual (Page 23)

Operation
900-0161-01-00 Rev A 21
Description of Inverter Operations
The items in this section are operations common to all Radian inverters. These are used in most or all
of the input modes described in the preceding section.
Some of the items in this section are functions which can be manually selected, enabled, or
customized. Other items are general topics or applications for the inverter. These items may not have
their own menus, but their activity can still be influenced or optimized by changing certain settings.
Any of these items may need to be adjusted so that the inverter is best matched to a particular
application. The operator should review these items to see which are applicable.
All items described as settable or adjustable have set points which can be accessed using the
system display. The default settings and ranges of adjustment are listed in Table 16 beginning on
page 65 of this manual.
Inverting
This is the Radian inverter’s primary task. The inverter converts DC voltage from batteries into AC
voltage that is usable by AC appliances. It will continue to do this as long as the batteries have
sufficient energy. The batteries can be supplied or recharged from other sources, such as solar, wind,
or hydroelectric power.
The inverter’s design uses transformers and high-frequency H-Bridge FET modules to achieve the
required high-wattage output. In the GS8048A, the dual design allows half the inverter to shut down
for lower idle consumption when not in use.
The Radian can deliver the rated wattage continuously at 25°C. The maximum output is derated at
temperatures exceeding 25°C. See pages 61 and 63 for these wattages.
Measure the total load wattage so that it does not exceed the Radian’s capacity. The Radian cannot
maintain its AC voltage under an excessive load. It will shut down with a
Low Output Voltage error.
IMPORTANT:
 The Radian inverter cannot support severe output load imbalance. The GS8048A can
maintain no more than 4 kVA continuously on either the L1 or L2 output, regardless of
the load on the other output. For example, it cannot maintain 8 kVA on L1, even if the
load on L2 is 0.
 Similarly, the GS4048A can maintain only 2 kVA on a single output, regardless of the
state of the other output.
 Any greater loads (at 25°C) will cause a Low Output Voltage error.
DC and AC Voltages
The Radian inverter requires batteries to operate. Other sources may not maintain DC voltages
that are consistent enough for the inverter to operate reliably.
CAUTION: Equipment Damage
Do not substitute other DC sources in place of the batteries. High or irregular voltages
may damage the inverter. It is normal to use other DC sources with the batteries and
the inverter, but not in place of the batteries.
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