TECHNOLOGY
8 June 2007 / Alpha alternator - Alpha Pro regulator / EN
Once the battery is 100% full, the Alpha Pro
regulator automatically switches over to the float
phase.
During the float phase (C) the Alpha Pro regulator
switches to 13.25V (12V models) or 26.5V (24V
models) @ 25°C / 77°F and stabilises this voltage to
maintain the batteries in an optimum condition.
Connected loads are powered directly by the
charging system. If the load is higher than capacity
of the charging system, the required additional
power comes from the battery, which will be
progressively discharged. The Alpha Pro regulator
will start a new cycle when the engine is started
again.
3.2.2 Temperature compensated charging
A battery temperature sensor in included in the
delivery of the Alpha Pro regulator. By installing this
battery temperature sensor the charge voltages are
automatically adapted for deviating temperatures.
Figure 3: Temperature compensated charging
See figure 3 When the battery temperature is low,
the charge voltage increases. On the other hand,
when the battery temperature is high, the charge
voltage is decreased. Over charge and gassing are
prevented this way. This will extend the life of your
batteries. Consult your battery manufacturer for
recommended charging voltages
12V
24V
battery temperature (°C)
charge voltage (V)