Grid Support Settings - Xantrex XW4024-120 Operation Manual

Grid Support Settings

975-0240-01-01
The Grid Support Settings menu contains configuration options for grid-tie
operation. To enable all these settings, Grid Support must be enabled in the Setup
menu (see "XW Inverter/Charger Setup Menu" on page 3–2).
Important:
To allow Grid Support to function after battery charging has completed, it
is recommended to set the Charge Cycle to 2-Stage. After completing the absorption
charger stage the XW Inverter/Charger checks whether battery voltage is above the Grid
Supp Volts setting. If battery voltage is above the Grid Supp Volts setting, the XW
Inverter/Charger uses available DC power to support the loads. See "Charger Settings
Menu" on page 3–10.
Turning the charger off also enables Grid Support functionality.
If the Charge Cycle is set to 3-Stage, the Grid Supp Volts setting must be higher than the
float voltage setting for your battery type for Grid Support settings to function (see
"Custom Battery Menu" on page B–4 for default Float voltage settings).
Important:
Upon startup, the XW Inverter/Charger does not enable Grid Support
functions for five minutes. During this five-minute period the XW Inverter/Charger
determines whether the utility grid voltage and frequency are stable and within nominal
range. For more information, see "Islanding Protection" on page 1–5.
Table 3-6 Grid Support Settings menu
Item Description
Grid Supp Volts Sets the level to which the batteries will be discharged when the
inverter is selling power to the grid or supporting the power grid by
providing additional power to the loads. This setting is not
adjusted for the battery temperature if the temperature sensor is
installed.
Sell Turns Sell mode on and off. When Sell is enabled, the XW
Inverter/Charger AC output is divided between powering loads
and delivering power to the utility grid. Sell mode requires the
battery voltage to be above the Grid Supp Volts.
Max Sell Amps Sets the maximum AC amps allowed to be delivered to the utility
grid from a solar array and/or the batteries during grid-tie
operation. This setting is only used if Sell mode is enabled.
The Max Sell Amps must be less than 80 per cent of the selected
AC1 breaker setting. If set higher, the breaker setting will override
the Max Sell Amps setting to avoid tripping the breaker.
Load Shave Enables or disables the Load Shave feature. Load Shave allows the
XW Inverter/Charger to support the grid in powering local loads
during a defined window of time (set using Load Shave Start and
Load Shave Stop). When in this mode, the XW Inverter/Charger
operates until the batteries discharge to the LBCO threshold, after
which the unit reverts to AC pass-through. The charger is
automatically blocked during the Load Shave time window.
Grid Support Settings
3–17