Characteristics of the Siemens photovoltaic modules SM-55 y SM-50
 
 
 
SM-55 SM-50
Nominal voltage 12V 12V
Maximum power (1) 55W 50W
Minimum power (2) 50W 45W
Current at the maximum power point 3,15A 3,05A
Voltage at the maximum power point 17,4V 16,6V
Maximum current (short circuit output) 3,45A 3,4A
Maximum voltage (open circuit) 21,7 21,4
Nominal working temperature 45ºC
Current temperature coefficient +1.2mA/°C
Voltage temperature coefficient -0.077 Volts/°C
Range of temperature variation -40 a 85ºC
Relative humidity 85%
Maximum system voltage 1000V (ISPRA) 
600V (UL1703)
Maximum pressure on the surface 2400N/m2
Maximum distortion (3) 1.2 degrees
Ice balls resistance (25 mm diameter) 23 m/s
Cells in series 36
Dimensions 1293 x 329 x 34 mm
Weight 5,5 kg
 
(1) Determined under standard test conditions (STC): irradiance = 1000W/m2, cell temperature = 25ºC, solar spectrum ASTM E892 (air mass = 1,5)

(2) Determined under the nominal operational conditions (NOC): irradiance = 800W/m2, ambient temperature = 20ºC, wind speed = 1m/s

(3) Lifting diagonal of one corner with the other three fixed

Test performed following the CEC503 specifications to ensure the long life and operation in outdoor