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Home > Charge Controller Support > PWM Solar Charge Controller Support > PWM-30-UL > PWM-30-UL Installation: System Voltage and Current
PWM-30-UL Installation: System Voltage and Current
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The GP-PWM-30-UL is intended for use at 12 VDC system voltage and is rated for a maximum continuous DC input current of 37.5A and input voltage of 35VDC.


Per the National Electric Code (NEC) article 690.7 and 690.8, PV module nameplate ratings must be multiplied by required values (typically 1.25 for both voltage and current) to obtain the true voltage and continuous current available from the module.

 

Applying theSE factors, the maximum allowable PV Panel rated Isc is 30A (30A x 1.25 = 37.5A), and the maximum voltage, Voc is 28VDC (28VDC x 1.25 = 35VDC).

 

The voltage and current ratings of all equipment connected to PV panels must be capable of accepting the voltage and current levels available from PV panels installed in the field.

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