8
Battery Charging Stage
The controller has a 3 stages battery charging algorithm (Bulk Charging, Constant
Charging and Float Charging) for rapid, efficient, and safe battery charging.
Figure 1-4 Battery changing Curve
A) Bulk Charging
In this stage, the battery voltage has not yet reached constant voltage (Equalize or Boost
Voltage), the controller operates in constant current mode, delivering its maximum
current to the batteries (MPPT Charging).
B) Constant Charging
When the battery voltage reaches the constant voltage setpoint, the controller will start
to operate in constant charging mode, this process is no longer MPPT charging, and in
the meantime the charging current will drop gradually, the process is not the MPPT
charging. The Constant Charging has 2 stages, equalize and boost. These two stages are
not carried out constantly in a full charge process to avoid too much gas precipitation or
overheating of battery.
Boost Charging
The Boost stage maintain 2 hours in default, user can adjust the constant time and
preset value of boost voltage according to demand.
The stage is used to prevent heating and excessive battery gassing.
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