Installation Guide

Technical description

7.2 Battery charging function

The charging characteristics are referred to as IU0U characteristics.

1: I phase (bulk)

At the beginning of the charging process, the ﬂat battery is charged with a

constant current (100 % charge current) until the battery voltage reaches

the charging end voltage. The charging current decreases when the battery

has reached this charging level.

2: U0 phase (absorption)

Now the absorption charging process (U0 phase) begins, where the duration

depends on the battery. The voltage remains constant (U0).

This phase is limited to a maximum of 3 hours to prevent overcharging the

battery while driving.

3: U phase (ﬂoat)

Aer the U0 phase, the battery charger switches to the conservation charging

function (U phase).

U0 U

100 %

10 %

2 3

U/V

I/A