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Operation
900-0112-01-00 Rev B 15
AC Current Settings
The AC current settings control the amount of current that the inverter draws from the source(s). The
amount of current is controlled by the grid or generator limit settings. These settings should be
adjusted to match the size of the input circuit breaker or input conductor. In the system display, if the
source is set to
grid
, the inverter uses the grid settings. If the source is set to
gen
, the inverter uses the
generator settings.
¾
This is intended to protect a generator or source that may not be large enough to supply enough current for
both charging and loads. If the combined charging and loads exceed this setting, the inverter will reduce its
charge rate and give priority to the loads. If the loads exceed this number on their own, the charge rate will
be reduced to zero. The inverter is capable of supporting the source with power from the batteries. See the
section entitled “Input Support” on page 17.
¾
If multiple parallel inverters are installed with an AC source of limited amperage, the total combined
amperage settings for all units must be less than the AC input circuit. The Configuration Wizard in the
MATE3 can perform this calculation. However, the inverters do not perform this calculation. If the MATE3 or
the Configuration Wizard are not used, it may be necessary to divide the input size by the number of
inverters and assign an equal part of the amperage to each port.
AC Source Acceptance
The input source must meet the following specifications to be accepted:
¾ 230 Vac, ± 22 Vac (default setting), and
¾ 50 Hz, ± 5 Hz
When these conditions are met, the inverter will close its transfer relay and accept the input source.
This occurs after a delay which is specified below. If the conditions are not met, the inverter will not
accept the source. If it was previously accepted and then rejected, the inverter will open the relay and
return to inverting power from the batteries.
¾
If the source is set to
grid
, there is a connection delay of approximately 15 seconds. This time is not
adjustable.
¾
If the source is set to
gen
, there is a connection delay with a default setting of 0.5 minutes. This is intended as
a generator warmup period. This item is adjustable.
NOTES:
Several items, external to the inverter, may prevent the inverter from accepting AC power even if
electrical conditions are met. One is the high-battery transfer (HBX) mode, which is operated by the
system display. (See page 30 and the system display manual.) Another is the system display’s
AC IN
or
AC INPUT
hot key, which can turn off the input to all inverters. (See the system display manual.)
The inverter has additional criteria that control whether it sells power. The inverter may accept AC
power but refuse to sell if the acceptance criteria are met, but the grid-interactive criteria are not. (See
the section entitled “Selling” on page 24.)