Product Manual

Operation

900-0161-01-01 Rev B

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 17

beginning on page 63 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 57 and 59 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.