Product Manual

Operation
22 900-0161-01-01 Rev B
The following items will affect the inverter’s operation. These are only used when the inverter is
generating AC power on its own.

Low Battery Cut-Out
: This function prevents the inverter from draining the batteries completely.
When the DC voltage drops below a specified level for 5 minutes, the inverter will stop functioning.
The system display will give a
Low Battery V
error. This is one of the error messages on page 51. It
appears as an event on a MATE3-class system display.
This function is intended to protect both the batteries and the inverter’s output. (Continuing to invert
on a low DC voltage may produce a distorted waveform.) This item is adjustable.

Low Battery Cut-In
: The recovery point from
Low Battery Cut-Out
. When the DC voltage rises
above this point for 10 minutes, the error will clear and the inverter will resume functioning. This item
is adjustable.
 Connecting an AC source for the inverter to charge the batteries will also clear a low battery error.

Output Voltage
: The AC output voltage can be adjusted. Along with small changes, this allows the
inverter to be used for different nominal (split-phase) voltages such as 100/200 Vac and 120/240 Vac.
IMPORTANT:
The output voltage can adjusted to a different nominal value for a particular region. Making
this change will not affect the default input voltage range accepted by the inverter from an
AC source. The input range must be adjusted manually. These changes should be made
at the same time. (See
AC Source Acceptance
on page 25.)

The inverter is also controlled by a high battery cut-out limit. If the DC voltage rises above this limit,
the inverter will immediately stop functioning and give a
High Battery V
error. This function is
intended to protect the inverter’s output and loads. Continuing to invert on a high DC voltage may
produce a distorted waveform. Note that the inverter’s high battery cut-out does not alleviate the high
battery state. The cause is an external condition which could damage the inverter.
 For the Radian inverter, the high battery cut-out voltage is 68 volts. It cannot be changed.
 If the voltage drops below this point, the inverter automatically recovers.
 This is one of the errors on page 55. It appears as an event on a MATE3-class system display.
AC Frequency
CAUTION: Equipment Damage
Setting the inverter’s output frequency to deliver 50 Hz to 60-Hz loads, or setting it to deliver
60 Hz to 50-Hz loads, could damage sensitive devices. Make certain the inverter’s output
frequency matches the installation.
The inverter’s output can operate at a frequency of either 60 or 50 Hertz. This output frequency
(and the AC acceptance frequency) can be changed with the
Operating Frequency
menu item.
This requires high-level access. Due to the possibility of damage, access to this setting has
been restricted by placing it in the
Grid Interface Protection
menu. See page 15 for more
information. See Table 17, which begins on page 63, for the location of the
Operating
Frequency
menu item.
The installer password must be changed from the default in order to get access to this menu.
Once this password has been changed, the
Grid Interface Protection
menu can only be
accessed by using the installer password. This password can be changed in the system
display.
Hz