Product Manual

Configuring Advanced Settings
975-0638-01-01 Rev E 4–15
Battery Charger Functions
When AC power is available, the Conext SW 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 Conext SW 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 4–19).
Multi-Stage Charging Process
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 Bulk charge is the first stage in the charging process and provides the batteries
with a controlled, constant current. Once the battery voltage rises to the bulk
voltage threshold, the charger switches to the Absorption stage.
Auto
Charge
Enable
When this setting is enabled, it overrides the “Charger” function to
begin charging automatically when qualified AC is present. This
happens even when the charger function is previously disabled.
Chg Block
Start
Sets the time to halt charging. See “Using Charger Block” on
page 4–18 for more information.
Chg Block
Stop
Sets the time to resume charging. See “Using Charger Block” on
page 4–18 for more information.
Tabl e 4-6 Charger Settings Menu Description
Item Description
IMPORTANT: 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.
NOTE: If the AC input fails or drops below the lower VAC limit (as set in AC
Settings), the complete multi-stage charge cycle (Bulk, Absorption, Float/No
Float) restarts once the source AC returns to within tolerance condition. If the
batteries are already nearly full, the charge cycle will take little time to complete.
Tabl e 4-7 Preset Bulk Voltage Settings for Different Battery Types
Battery Type
24-Volt Models
Preset Bulk Voltage
48-Volt Model
Preset Bulk Voltage
Flooded 28.8V 57.6V
Gel 28.4V 56.8V
AGM 28.6V 57.2V
ConextSW-NA-OwnersGuide.book Page 15 Thursday, July 23, 2015 3:26 PM