The solar array minimum and maximum voltages are calculated as follows:
|Vmax =||Maximum temperature adjusted open circuit voltage encountered|
|Vmin =||Maximum temperature adjusted open circuit voltage encountered|
|XSeries =||The number of modules in series|
|Voc =||Open circuit voltage of the module, experienced by the array is subjected to sunlight or just before the inverter is starting, also known as the no-load voltage.|
|Vmp =||Maximum power voltage of the module. This voltage exists when the array / inverter is operating and producing power in ideal sunlight conditions.|
|Ltemp =||The design minimum temperature experienced in daylight conditions|
|Htemp =||The design maximum temperature experienced in daylight conditions|
|∆V =||The change in temperature between ambient temperature and sunlight soaked solar modules|
|Vtemp =||The solar module manufacturer’s voltage drop due to temperature (expressed in V/ºC)|
What is the magical 25 in the equation? This is the temperature at which the module is rated by the manufacturer. These equations adjust the temperature above or below the nominal rating at 25 ºC. The temperature adjustment is then multiplied by the appropriate voltage condition to judge whether or not the array and inverter are compatible.
Please contact us with any questions at Technical Support.