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INTEGRATED PROTECTIONS
HOT SPOTS PROTECTIONS
UNISUN M solar panels are equipped with anti-hot spots diode directly
integrated in the junction box.
A shadow, a leaf, or a piece of rope can mask a cell completely. This last
becomes a "hot spot", receiving the current from all the other cells of the series.
Cell voltage= 0,5V
Maximal accepted voltage= 10V
Over 10V, the cell starts to heat up, causing damages which can lead to fire.
To protect against this phenomenon, the protection diodes integrated in the
UNISUN M junction box block the current in the masked cell series, avoiding any
overvoltage cell.
Please note that any modification or suppression of panels connections (connectors,
junction box) excludes any coverage under warranty.
CHOOSING YOUR SOLAR CHARGE CONTROLLER : PWM OR MPPT
Two technologies can be found:
PWM
•
battery voltage.
MPPT (maximum point-tracking), regulates the panel's voltage until the
•
battery voltage, and converts the extra voltage of the panel into charge
current.
Starting from 50W of panel power, it is recommended to use a MPPT solar charge controller.
Please make sure that the Voltage in open circuit (Voc) accepted by your solar charge controller is higher
than your panel's one.
For more information, read the solar charge controllers user manual.
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(pulse width modulation), regulates the panel's voltage until the
17,8V
5,62A
PWM
100W
17,8V
5,62A
MPPT
100W
Voltage (V)
Intensity (I)
Voltage (V)
Intensity (I)
www.uniteck.fr
12,5V
5,62A
70W
12,5V
7,6A
95W
*
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