Xantrex XW4024-120 Operation Manual page 35

Table 2-1 XW Inverter/Charger Home Screen States
XW Inverter/
Charger Status Displayed When...
Fault The XW Inverter/Charger has an active fault. The Fault/Warning light on the System Control
Panel is on.
Gen Support There is AC input from the generator, and the XW Inverter/Charger is supporting the generator
by supplying additional power to the critical loads.
The XW Inverter/Charger supports the generator (or other power source connected to the AC2
input) when the AC load current drawn from AC2 exceeds 80 per cent of the AC2 breaker
setting or GenSup Amps setting for 1 to 2 seconds.
The XW Inverter/Charger uses stored DC capacity to load share with the generator until the total
AC load current (generator plus inverter output) drops by 2 amps plus 10 per cent of the GenSup
Amps setting for 6 seconds.
For example if GenSup Amps is set to 10 amps, the inverter starts to support when the load
exceeds 10 amps for 2 seconds and stops when it drops more than 3 amps below the GenSup
Amps setting, or 7 amps (2 amps plus 10 per cent of 10 amps = 3 amps).
The system can enter this state if the battery voltage is above the Low Batt Cut Out setting and
Gen Support is enabled. See "Generator Support Settings" on page 3–21.
Grid Support There is AC input from the utility and the XW Inverter/Charger is supporting the utility grid by
supplying additional power to the critical loads.
The XW Inverter/Charger supports the utility grid by limiting the power drawn from the utility
to less than 10 per cent of the load demand. This mode is desirable for using excess energy from
auxiliary DC sources like PV, while still maintaining a charged battery bank. No power is sold to
the utility in this mode.
The XW Inverter/Charger uses stored DC capacity to support the grid until the total AC load
current (grid plus inverter output) drops by 2 amps plus 10 per cent of the Load Shave Amps
setting for 6 seconds.
The XW Inverter/Charger enters this state only when the Grid Support is set to "On" and battery
voltage is above the Grid Supp Volts setting. See "Grid Support Settings" on page 3–17.
Load Shaving There is AC input from the utility, and the XW Inverter/Charger is supporting the utility grid
when the current required to power the loads rises above the Load Shave Amps setting between
the Load Shave Start and Load Shave Stop times set on the Grid Support menu.
Many utilities impose a surcharge on their customers based on the peak load used by a facility.
When load shaving, the XW Inverter/Charger uses stored DC capacity to reduce the peak load
on the utility grid and keep current draw from the grid equal to or under the Load Shave Amps
setting. The XW Inverter/Charger enters this state only when Grid Support is enabled, the Load
Shave time window is valid and the load draw exceeds the Load Shave Amps setting. See "Grid
Support Settings" on page 3–17.
Search Search Mode is enabled and the XW Inverter/Charger is standing by, waiting to begin inverting.
See "Using Search Mode" on page 3–8.
SellToGrid The XW Inverter/Charger is grid tied (grid voltage and frequency are within the limits specified
by UL1741) and selling power to the utility grid. Both Grid Support and Sell must be enabled in
order to sell power back to the utility. See Table 3-1 on page 3–3 and "Grid Support Settings" on
page 3–17.
975-0240-01-01
Monitoring Operation with the XW System Control Panel
2–13