Xantrex XW4024-230-50, Руководство по эксплуатации

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Configuration
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power is then drawn from the utility to support the load. However, if the local load
demand is less than the power available from external DC sources, the net excess
power from the external DC sources is not converted and hence not used.
Grid Support enabled, Sell enabled In this mode, all available excess DC
power is first used to power local loads. Any remaining power is exported to the
utility grid.
Grid Support and Battery Charging
Charge Cycle
settings With the charger enabled, the XW Inverter/Charger enters Grid Support mode
only after completing a charge cycle when it is first powered up or reconnected to
the grid. It is recommended to set the Charge Cycle to 2-stage (default) to allow
Grid Support to function immediately after the Absorption charge stage. See
“Charger Settings Menu” on page 3–9.
Grid Support modes Grid Support can be configured to operate in one of two modes.
Fixed battery voltage This mode is suitable for systems with DC sources that
are not connected to the XW Inverter/Charger through Xanbus or mixed systems
which have both Xanbus connected XW Solar Charge Controllers and other DC
sources. In this mode, the Grid Supp Volts setting is set about 0.5 volts below the
voltage provided by the DC source (typically the float voltage setting of the DC
source or charge controller).
In fixed battery voltage mode the XW Inverter/Charger tries to regulate the
battery voltage to the Grid Supp Volts setting by converting the available DC
power to AC power to support the loads or export to the utility grid. Because the
battery bank voltage may not reach Bulk/Absorption voltages in this mode, it is
recommended to occasionally force a full charge cycle by either temporarily
disabling Grid Support or forcing a Bulk charge cycle from the grid (see “Force
Chg” on the “XW Inverter/Charger Setup Menu” on page 3–2).
Enhanced interactive mode This mode is suitable for XW Systems with only
XW Solar Charge Controller(s) networked to XW Inverter/Charger(s) through
Xanbus. In this mode, the Grid Supp Volts setting is set above the charge
controller’s Bulk and Absorb voltages (for example, 32 volts on a 24-volt system
and 64 volts on a 48-volt system).
In enhanced interactive mode the XW Inverter/Charger automatically tracks the
XW Solar Charge Controller voltage as it transitions through all charge states
(from Bulk to Absorb to Float). This allows the XW System to execute a full
battery charge cycle while still converting excess DC power to AC power to
support the loads or export to the utility grid. Since this mode allows the battery
bank voltage to reach absorption levels (when PV harvest is adequate), the state of
health of the battery is improved.
Peak Load Shaving
Many utilities impose a surcharge on their customers based on the peak load used
by a facility. To reduce utility peak demand charges, the inverter can be
configured (using the Load Shave Amps setting) to limit the maximum draw the
AC loads place on the utility. The inverter can be programmed to provide power