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Assembly instructions: Please install the module according to the drawing.
Please pay attention to the following:
1.
The cables should be kept as short as possible. Furthermore, the cables must be adjusted to the charging cur-
rent. Cables, which are too thin or too long will cause voltage losses in the cable. For smaller solar systems (up
to approx. 2 A), we recommend cables with a cross-section of at least 1.5 sq. mm. In case of higher currents,
4...10 sq. mm cables should be used in order to keep the power losses in the cable low.
2.
Please interpose a fuse between the solar panel and charging regulator. This fuse should be designed in such a
manner that it is adjusted to the maximum current of the solar panel but should not exceed 16 A. So, when us-
ing solar panels with e.g. 2 A, the fuse should be 2 A, too.
3.
The charging regulator should be mounted as close as possible to the accumulator (the cable length should be
preferably < 1 m). Reason: the charging regulator has to check the accumulator voltage constantly. If the cables
between the regulator and accumulator are very long, then the voltage measured with disconnected charging
current is another than during continuous charging (due to the cable losses). This will cause that the regulator
constantly switches on and off with delay if the accumulator approximates the interrupting voltage.
4.
The metal base plate of the charging regulator may heat depending on the charging current. Please install the
charging regulator in such a manner that it will always be well "ventilated". The charging regulator may be oper-
ated open in this manner up to charging currents of approx. 4 A. In case of charging currents of 4 A...max. 16 A
(total load), the module with the metal base plate has to be screwed planely on a heat sink. The heat sink
should have a thickness of at least 4 mm and a total surface (cooling fin surface) of > 300 sq. cm. The metal
base plate may not heat up to > 75 degree C during operation! In normal cases, however, such high currents do
not occur. If you have bought, for example, an expensive 100 W solar system, then this value applies at optimal
insolation (at noon in the Sahara). During normal operation only currents of < 4...5 A flow in e.g. such a system
in Europe.
5.
Setting into operation: After installing the system according to the drawing and the above description it may be
set into operation. If the accumulators have a charging voltage of < 13,4 V and thus can be recharged, the cor-
responding LED on the charging regulator lights up and thus indicates that the accumulator is being charged. If
all connected accumulators are completely charged, the charge indicators extinguish and the LED "accumulator
charged" lights.
Additional notes: If, with some accumulators, the pilot lamp "accumulator charged" does not light up after long charg-
ing and the charging pilot light lights constantly, this may have the following cause: either your solar system does not
deliver enough current in order to charge the accumulator completely or the accumulator is old and cannot reach the
max. peak voltage of approx. 14.4 V any longer. Of course, such accumulators may still be used but due to their age
they do not reach the maximally possible charging voltage and the LED "accumulator charged" doesn't light up.
If only 1 accumulator is connected, it has to be connected at output 2 (output 1 remains free). The additional second
accumulator may be connected at connection 1 if wanted. Reason: The charging regulator draws its supply voltage
from the accumulator at connection 2. If no accumulator is connected there, the regulator doesn't operate. If the con-
nected accumulator is empty and the solar panel doesn't supply any current either (the sun doesn't shine), none of
the LEDs at the module lights. If you require much power, it is also possible to connect both accumulator outputs in
parallel to a large accumulator. The charging current may then be up to 16 A with cooling. Only 12 V solar panels may
be connected as current source, no chargers, power supplies, other accumulators, windmills, etc.
Use as directed: Charging current regulation for accumulators, which are charged by solar cells.
Circuit description: This module is an electronic switch, which switches on the connection to the solar panel when the
accumulator is not completely charged and switches it off again when the accumulator is charged. A power-mos tran-
sistor is employed as circuit element, which operates almost loss-free.
Technical data:
Input voltage: solar panels 15...30 V open circuit voltage, 12 V rated voltage
Max. charging current: total 16 A (2 accumulators of max. 8 A each or 1 accumulator connected in parallel at both
outputs up to 16 A)
Connections: 1 or 2 accumulators 12 V. When connecting only 1 accumulator, it has to be connected at connection
„2".
Displays: one display per accumulator "accumulator is charging", 1 display: "all accumulators charged".
Cooling: In case of currents > 4 A the module has to be screwed with the metal bottom on a heat sink with a surface
of > 300 sq. cm.
Fuse: A pre-fuse F16 A is necessary (not included)
Switch-on voltage: accumulator approx. < 13.4 V ± 5 %
Switch-off voltage: „accumulator charged" approx. 14.4 V ± 5 %
Own current consumption (is taken from the accumulator): < 2 mA
Reverse current-proof (no additional diode required)
Dimensions: approx. 87 x 60 x 32 mm
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http://www.kemo-electronic.eu
Kemo Germany 08-016/M174/KV040
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