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Operation
900-0112-01-00 Rev A 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 breaker or circuit which is to be protected. In the MATE system
display, if the
ac transfer control
menu is set to
grid
, the inverter uses the grid settings. If the menu is
set to
gen
, the inverter uses the generator settings.
This is intended to protect a generator or source that may not be large enough to supply enough current.
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
“Grid/Generator Support” on page 17.
If multiple parallel inverters are installed with an AC source of limited wattage, the total combined
amperage settings for all units must be less than the input or breaker size of the AC source. The inverters
do not perform this calculation. 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:
230 Vac, ± 22 Vac (default setting), and
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.
If the MATE’s
ac transfer control
menu is set to
grid
, there is a connection delay of approximately
15 seconds.
If the MATE’s
ac transfer control
menu 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
MATE system display. (See page 28 and the MATE manual.) Another is the MATE’s
AC IN
hot key,
which can turn off the input to all inverters. (See the MATE manual.)
The inverter has additional criteria that govern 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 23.)