Truma SDC12, Инструкции по эксплуатации и монтажу

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7
Function
The device is a MPPT, or maximum power point tracker, an
electronic DC to DC converter that optimises the match
between the solar panels (PV panels) and battery. 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 preserves
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 separate
battery connections.
The device is capable of continuous operation and parallel
mode. Consumers can be continuously connected, switched
on or disconnected. Consumers are supplied and the batteries
are charged at the same time via the battery. The consumer
current here should be smaller than the solar charging current
as otherwise the battery will not charge.
If the device is operated in conjunction with an external
temperature 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
connecting one or several solar modules. Please observe the
maximum voltage and power consumption values detailed
on the controller reverse. This type of connection should be
completed in parallel.
Charging process
The device has an electronic reverse input 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.
Boost phase
Charging with maximum available solar charging current until
the charging end voltage is reached.
Float phase
The charging voltage is set to 13.8v for GEL type, see battery
charging table for other types. The charging current drops to
the value necessary to compensate the self-consumption of
the battery. Power is still supplied to the consumers via the
battery. If the consumed current exceeds the available solar
charging current, the charging process can no longer be
maintained.
If the battery voltage drops below the selected battery type
voltage, the device automatically switches to the boost phase,
if there is adequate solar charging current.