Due to the installation environment or load work, the system may
not stabilize the battery voltage at a constant voltage. The
controller will accumulate the time when the battery voltage is
equal to the set value. When the accumulative time equals 3
hours, the system will automatically switch to float charging.
If the controller time is not adjusted, the controller will equalize
charging following the inner time.
c) Float Charging
After the constant charging stage, the controller will reduce the battery voltage to the
float charging preset voltage by reducing the charging current. During the floating
charge stage, the battery is charged weakly to ensure that the battery is maintained in
a fully charged state. In the float charging stage, loads can obtain almost all power
from the solar panel. Suppose loads' power exceeds the solar array's power. In that
case, the controller will no longer maintain the battery voltage in the float charging
stage. When the battery voltage goes lower than the boost voltage reconnect voltage,
the system will exit the float charging stage and enter the bulk charging stage again.
1.5 Starter battery BATT2
1) Working principle
The controller trickle charges the BATT2 at 1A constant current. When the voltage
reaches the "Full voltage" during the BATT2 charging process, the controller will stop
charging and exit from the constant voltage charging mode.
2) Voltage parameters
BATT2 ONLY supports lead-acid battery types. Before starting the
BATT2 charging, please connect the BATT1 first.
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