Conext SW4048 4,000W 48V Installation

Configuring Advanced Settings
975-0638-01-03 4–17
Float Stage Float charge maintains a trickle charge on the batteries whenever AC is present
on the Conext SW input. Float charging reduces battery gassing, minimizes
watering requirements (for flooded batteries), and makes sure the batteries are in
a constant state of readiness. When three-stage charging is selected, the
charger automatically switches to the float stage after the batteries have received
a bulk and absorption charge. The batteries will be maintained at the default float
voltage level for the selected battery type or the voltage selected under Float
Voltage on the custom battery Settings menu.
Two-Stage Two-stage (bulk and absorption only, no float) mode differs from an ordinary
three-stage charge mode in that it does not continuously maintain the battery at
float voltage. Instead, the Conext SW begins charging the battery in bulk mode
whenever the battery voltage drops below the recharge level. While the battery
voltage is above the recharge level, the inverter continues to pass power through
from the AC source to the loads but does not actively charge the batteries.
AGM 28.6V 57.2V
Custom 28.8V (changeable) 57.6V (changeable)
LithiumIon 29.0V (changeable) 58.0V (changeable)
Table 4-8 Preset Absorption Voltage Settings for Different Battery Types
Battery Type 24-Volt Models 48-Volt Model
NOTE: The battery voltage can increase above the float voltage when using an
external charging device such as PV arrays, wind turbines, or micro-hydro
generators. Be sure to include appropriate charge management equipment
with all external DC sources.
Table 4-9 Preset Float Voltage Settings for Different Battery Types
Battery Type
24-Volt Models
Preset Float Voltage
48-Volt Model
Preset Float Voltage
Flooded 27.0V 54.0V
Gel 27.6V 55.20V
AGM 26.8V 53.6V
Custom 27.0V (changeable) 54.0V (changeable)
LithiumIon 26.85V (changeable) 53.6V (changeable)