Operation
18
900-0167-01-00 Rev A
When multiple inverters are stacked together in parallel, the master inverter’s input mode is imposed
on all slaves. (See the stacking section on page 43.) The slave settings are not changed; they retain
any mode that was previously programmed. However, the slave will ignore its programmed mode
and use that of the master. This also applies to any parameters in the mode menu (
Voltage Limit
,
Connect Delay
, and so on).
The following pages compare the various functions of each input mode.
Generator
The
Generator
mode allows the use of a wide range of AC sources, including generators with a rough
or imperfect AC waveform. In other modes, a “noisy” or irregular waveform may not be accepted by
the inverter. (Self-excited induction generators may require this mode when used with the inverter.)
Generator
allows these waveforms to be accepted. The charging algorithm of this mode is designed
to work well with AC generators regardless of power quality or regulation mechanism. The generator
must still comply with the inverter’s nominal input specifications. (See page 29.)
BENEFITS
:
The FXR inverter can charge the batteries from the generator even when the generator is undersized, of low
quality, or has other problems. See page 32 for recommended parameters for sizing a generator.
If the utility grid is unstable or unreliable,
Generator
mode may allow the inverter to accept the power.
A programmable delay time is available which will allow a generator to stabilize before connection. In the
MATE3, this menu item is
Connect Delay
. It is available in both the
Grid AC Input Mode and Limits
and the
Gen AC Input Mode and Limits
menus, depending on which input is being programmed.
NOTES
:
Any AC fluctuations that are accepted by the inverter will be transferred to the output. The loads will be
exposed to these fluctuations. It may not be advisable to install sensitive loads under these conditions.
The name of
Generator
mode does not mean that the inverter requires a generator input when using this
mode. The use of this mode does not require the use of the
Gen
input type; either selection can be used.
Conversely, the inverter is not required to be placed in this mode because a generator is installed.
Support
The
Support
mode is intended for systems that use the utility grid or a generator. In some cases the
amount of current available from the source is limited due to size, wiring, or other reasons. If large
loads are required, the FXR inverter augments (supports) the AC source. The inverter uses battery
power and additional sources to ensure that the loads receive the power they demand.
In the MATE3 system display, the
Grid Input AC Limit
dictates the maximum AC draw for the Grid
input. The
Gen Input AC Limit
sets the maximum draw for the Gen input. The Support function takes
effect if the AC demand on either input exceeds the
AC Limit
setting.
BENEFITS
:
Large inverter loads can be powered while staying connected to the AC input, even if the input is limited.
The added battery power prevents overload of the input source, but the batteries are not in constant use.
The FXR inverter will offset the loads with excess renewable energy if it is available from the batteries. See
page 42 for more information.
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