Battery Charger Functions; Multi-Stage Charging Process - Xantrex XW4024-230-50 Operation Manual

Configuration

Battery Charger Functions

Multi-Stage Charging Process

3–10
Table 3-3 Charger menu items
Item Description
Chg Block Start Sets the time to halt charging on AC1 (Grid). The AC2 (Gen) port is
unaffected by the Charger Block settings. The Charger Block Start
and Stop settings allow you to select when the charger stops charging
on AC1.
To disable the Charger Block function, set Chg Block Start and Chg
Block Stop to the same time. See "Using Charger Block" on page 3–13.
Chg Block Stop Sets the time that charging on AC1 can resume. At the Chg Block
Stop time, charging on AC1 is enabled again.
For default settings, see "Charger Menu" on page B–3.
Whenever AC is present on the XW Inverter/Charger input, the unit can operate as
a battery charger. Different battery types and chemistries require different
charging voltage levels. Not charging batteries at the required levels can shorten
battery life or damage the batteries. The XW Inverter/Charger is configured at the
factory to work with the battery types recommended for inverter applications. If
the default settings do not work for your specific installation, you can adjust the
charge stage settings (as recommended by the battery manufacturer) on the
Custom Battery Settings menu (see page 3–14).
Note:
This information is provided for guidance only. Variations in battery chemistry
and site-specific environmental considerations mean that you should consult your system
designer or battery manufacturer for specific recommendations for appropriate battery
voltage and current settings.
The charging cycle is a multi-stage process. Whenever qualified AC power is
present at the inverter's input, it passes power through to the connected load and
begins charging the batteries.
Bulk Stage
Charging
Started
DC Voltage
Increased Voltage
Max Charge Rate
Constant Current
DC Current
Time
Figure 3-4 Three-Stage Battery Charging Cycle
Absorption Stage
Bulk/Absorption
Volts Setting
Absorption Time
Constant Voltage
Setting
Reduced Current
Float Stage
Float Volts Setting
Reduced Voltage
Reduced Current
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