Function; Charging Process - Truma SDC 10 Instructions De Montage

Function

The device has a modern microprocessor-controlled pulse
width modulated three phase charging characteristic. This
allows high performance combined with a light weight and
small dimensions. By virtue of the high-quality electronics, it
works highly efficiently. The automatic charging process pre-
serves the device and does not overcharge the batteries. This
in turn extends the service life of the batteries significantly.
It is suitable for batteries with liquid, gel or AGM technology
and has a settable charging current distribution for two sepa-
rate battery connections.
The device is designed for continuous operation and parallel
mode. Consumers can be continuously connected, switched
on or disconnected. Consumers are supplied and the batter-
ies are charged at the same time. The consumer current here
should be smaller than the solar charging current as other-
wise the battery will not charge.
If the device is operated in conjunction with an external tem-
perature sensor for the supply battery (battery 1), the device
regulates the charging voltage automatically depending on
the battery temperature. This ensures particularly effective
and gentle charging of the battery. If an external temperature
sensor is not used, the device regulates the charging process
based on the internal temperature sensor.
The supply and starter batteries can be charged by connect-
ing one or several solar modules. Please observe the maxi-
mum voltage and power consumption values.
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Charging process

The device has an electronic reverse voltage, reverse current
and solar short-circuit protection. The charging current is only
released (see "charging diagram") if the battery is connected
correctly and there is enough power available from sunlight.
When a temperature sensor is used, charging takes place on
a temperature-dependent basis.
Bulk phase
Charging with maximum available solar charging current until
the charging end voltage is reached.
Absorption phase
The charging current is kept for a period of 2 hours. At the
end of this period, it changes to the float phase.
Float phase
The charging voltage is set to 13.8 V. The charging cur-
rent drops to the value necessary to compensate the self-
consumption of the battery. Power is still supplied to the
consumers. If the consumed current exceeds the available
solar charging current, the charging process can no longer be
maintained.
If the battery voltage drops below 13.3 V, the device automati-
cally switches to the bulk phase, if there is adequate solar
charging current.
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