Outback Power Systems GS3548E Operators Manual - Manual (Page 47)

Operation
900-0145-01-01 Rev A 45
 GT Limits activates the AUX output as an alert that the utility grid does not meet Grid Interface Protection
parameters for the grid-interactive function (see page 15). It can activate a light or alarm to show that the
grid-interactive function has shut down and that there may be problems with the grid. The AUX output will
cycle on and off if grid parameters are met and the reconnection timer is counting down.
∼ This function does not have settable parameters other than those of the Grid Interface Protection
menu (see Table 16 beginning on page 67).
 Source Status activates the AUX output whenever the inverter accepts an AC source. It can activate a light
or alarm to show that the utility grid is present or that a generator has started. Alternately, it could be used
to show that the source has disconnected.
∼ This function does not have settable parameters.
 AC Divert activates the AUX output to divert (or “dump”) excess renewable energy to an AC load, usually an
AC device powered by the inverter itself. 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 relay, which allows current to flow from the batteries
to a dedicated AC load when energized. Diversion is usually used to regulate battery charging. The AC
device is usually wired to the output or load panel and must be left on. It 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.
∼ The AUX output will automatically turn on to run the loads if the inverter accepts an AC source.
∼ Settable parameters include:
• Low and high DC voltage
• On and off delay
∼ During variable conditions, the AUX output is triggered no more than once per minute (if voltage
conditions are still met). This prevents rapid nuisance cycling of the AC load in the event of rapidly
changing conditions.
∼ AC Divert should not be used as the sole source of battery regulation. If the inverter shuts down or fails,
the batteries could suffer severe damage. This function should be supported by an external regulator.
• If the inverter shuts down due to overload, the AUX output will also shut down. If the inverter load
exceeds 30 Aac, the AUX output will turn off to prevent an overload condition.
• If either the FETs or the capacitors (see page 58) become too hot, the AUX will turn off due to
diminished inverter wattage capacity.
Note that even if every function in the menu is set to Off, the AUX output may still be triggered by an
external function such as AGS (see page 47).
The AUX functions are summarized in Table 5 on the next page.