Using Charger Block - Xantrex XW4024-120 Operation Manual

Configuration

Using Charger Block

3–14
The Charger Block feature halts charging on AC1 (Grid) for a period of time each
day. This period of time is defined by the Chg Block Start and Chg Block Stop
settings. In areas where the utility charges variable rates for electricity, it is
preferable to use utility power for charging only during non-peak hours. Charger
Block can prevent utility power from being used for battery charging during peak
billing periods.
During the time period set between Chg Block Start and Chg Block Stop, AC1
(Grid) input continues to be passed through to the loads. Inverter operation
remains unaffected during the charger block period.
During the Charger Block period, no charging on AC1 occurs even if the batteries
discharge below ReCharge Volts setting. However, a generator connected to AC2
(in the absence of utility/AC1 power) or an XW Solar Charge Controller may
charge batteries during the Charger Block period. AC priority must be set to AC2
to charge batteries with a generator connected to AC2 during the Charger Block
period.
If the charger is operating (that is, in Float, Absorption, Bulk or Equalize stage) at
the Chg Block Start time, charging on AC1 stops immediately and the charger
enters an idle state identical to No Float (see "2-Stage" on page 3–12). When the
Charger Block period is over, the charger does not resume the charge stage that
Chg Block Start interrupted. Instead, if the batteries are above the ReCharge Volts
setting, the charger remains idle.
If the batteries have fallen to the ReCharge Volts setting during the Charger Block
period, the XW Inverter/Charger begins a new charge cycle with the Bulk stage
after the Charger Block period has expired (at the Chg Block Stop time).
For example, Charger Block is set to start at 5:00 PM and end at 8:00 PM. If the
XW Inverter/Charger is charging from AC1, charging stops at 5:00. When
Charger Block ends at 8:00, the XW Inverter/Charger does not automatically
resume charging. The unit first measures the battery voltage. If the voltage is
below the ReCharge Volts setting, then the XW Inverter/Charger starts a new
charge cycle from Bulk. If the battery voltage is above the ReCharge Volts setting,
the XW Inverter/Charger remains idle and continues passing through AC to the
loads. The XW Inverter/Charger also keeps measuring the battery voltage as
before to determine whether to start a new charge cycle.
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