Berger BSS Serie Mode D'emploi page 22

System 36 cell 48 cell
voltage Voc<23V Voc<31V
Max. Best Max.
12V 4 2 2
24V 4 3 2
System 72 cell Voc<46V
voltage
Max. Best
12V 2 1
24V 2 1
NOTE: The above parameter values are calculated under standard test conditions (STC
(Standard Test Condition): Irradiance 1000W/m2, Module Temperature 25° C Air Mass1.5.)
MAXIMUM PV ARRAY POWER
The MPPT controller has the function of current/power-limiting, that is, during the charging
process, when the charging current or power exceeds the rated charging current or power,
the controller will automatically limit the charging current or power to the rated charging
current or power, which can effectively protect the charging parts of controller, and prevent
damages to the controller due to the connection of some over-specification PV modules. The
actual operation of PV array is as follows:
Condition 1:
Actual charging power of PV array ≤ Rated charging power of controller
Condition 2:
Actual charging current of PV array ≤ Rated charging current of controller
When the controller operates under "Condition 1"or"Condition 2", it will carry out the
charging as per the actual current or power; at this time, the controller can work at the
maximum power point of PV array.
WARNING: When the power of PV is not greater than the rated charging power, but the
maximum open-circuit voltage of PV array is more than 100V (at the lowest environmental
temperature), the controller may be damaged.
Condition 3:
Actual charging power of PV array > Rated charging power of controller
Condition 4:
Actual charging current of PV array > Rated charging current of controller
When the controller operates under "Condition 3"or"Condition 4",it will carry out the
charging as per the rated current or power.
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ENGLISH ENGLISH
54 cell 60 cell
Voc<34V Voc<38V
Best Max. Best Max. Best
1 2 1 2 1
2 2 2 2 2
96 cell Voc<62V Thin-Film-Module
Voc<80V
Max. Best
1 1 1 1
1 1 1 1
ENGLISH ENGLISH
WARNING: When the power of PV module is greater than the rated charging power, and
the maximum open-circuit voltage of PV array is more than 100V(at the lowest environ-
mental temperature), the controller may be damaged.
According to "Peak Sun Hours diagram", if the power of PV array exceeds the rated char-
ging power of controller, then the charging time as per the rated power will be prolonged,
so that more energy can be obtained for charging the battery. However, in the practical
application, the maximum power of PV array shall be not greater than 1.5 x the rated
charging power of controller. If the maximum power of PV array exceeds the rated charging
power of controller too much, it will not only cause the waste of PV modules, but also
increase the open-circuit voltage of PV array due to the influence of environmental tempe-
rature, which may make the probability of damage to the controller rise. Therefore, it is very
important to configure the system reasonably. For the recommended maximum power of
PV array for this controller, please refer to the table below:
Model
Rated Rated Charge
Charge Power
Current
10A 130W/12V
BSS0211
260W/24V
260W/12V
BSS1184 20A
520W/24V
¹ At 25° C environment temperature
2 At minimum operating environment temperature
WIRE SIZE
The wiring and installation methods must conform to all national and local electri-
cal code requirements.
PV Wire Size
Since PV array output can vary due to the PV module size, connection method or sunlight
angle, the minimum wire size can be calculated by the Isc* of PV array. Please refer to the
value of Isc in the PV module specification. When PV modules connect in series, the Isc is
equal to a PV modules Isc. When PV modules connect in parallel, the Isc is equal to the sum
of the PV module's Isc. The Isc of the PV array must not exceed the controller's maximum
PV input current. Please refer to the table as below:
Max. PV Array Max. PV open circuit
Power voltage
195W/12V 92V
1
390W/24V
390W/12V
100V 2
780W/24V
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