Product Manual

Operation
44 900-0145-01-01 Rev B
examples are illustrated in the Radian Series Inverter/Charger Installation Manual.
 The AUX output will activate to start the generator when the battery voltage falls to a low set point for a
settable delay. The AUX output is deactivated, shutting off the generator, once the battery voltage rises
to a high voltage setting for a settable delay period.
 Settable parameters include:
 Low and high DC voltage
 On and off delay
 Gen Alert control logic is located in the inverter. It has the advantage of functioning when the system
display is removed. However, it may not completely charge the batteries and does not have all the
advantages of the Advanced Generator Start (AGS) function that is found in the system display. For
many users, the AGS function may prove more useful than Gen Alert. Gen Alert, however, could be
used as a literal “Generator Alert”, a signal to the user to manually start a generator.
NOTE: Gen Alert is the default selection for the RELAY AUX settings.
IMPORTANT:
When using
Gen Alert
(or AGS), the generator must be connected to the inverter’s
GEN
terminals. If the input priority is set to
GRID
and the
GRID
terminals are energized, an
automatically controlled generator will shut down. This prevents an automatic generator from
working correctly when using the
GRID
terminals.

Fault
activates the AUX output when the inverter shuts down due to an error condition (see page 57). It can
activate a light or alarm to show that the inverter has failed. With the appropriate devices, it could send an
alarm signal through a radio, pager, or telephone dialer.
 This function does not have settable parameters.

Vent Fan
activates the AUX output in response to a high DC (battery) voltage set point. It can run a small
fan to ventilate the battery compartment to eliminate gases that result from battery charging. (This is
illustrated in the Radian Series Inverter/Charger Installation Manual.) When the voltage falls below this set
point for a settable delay period, the AUX output turns off.
 Settable parameters include:
 High DC voltage
 Off delay
NOTE
:
Vent Fan
is the default selection for the 12V AUX settings.

Cool Fan
activates the AUX output when the inverter reaches a high internal temperature. It is intended to
trigger a small external fan for additional cooling. See the Warning Troubleshooting table on page 58 for a
description of the fan criteria.
 This function does not have settable parameters.

DC Divert
activates the AUX output to divert (or “dump”) excess renewable energy to a DC load, such as a
resistor, a heater, or a fuel cell. This prevents overcharging of the batteries. This function can serve as rough
charge regulation for an external charging source.

When battery voltage rises above a settable high voltage level, the AUX output is activated after a
settable delay. The AUX output controls a larger, external relay. When energized, the relay allows
current to flow from the batteries to a dedicated DC load. (This is illustrated in the Radian Series
Inverter/Charger Installation Manual.) The resistor or load must be sized to dissipate all of the energy
from the renewable source if necessary. Diversion will turn off following a delay when a low DC voltage
setting is reached.
 Settable parameters include:
 Low and high DC voltage
 On and off delay