What solar panel specs are used for calculating voltage loss
Which solar panel specs are reasonably used for calculating line voltage loss?
Forum Discussion
Well that needs to be clarified. The panel's IV curves have battery voltage as the V.
If the 12v panel is at 17v that is way past the 15v knee on the IV curve and you would not get any amps
There is no "working voltage" with PWM---that is MPPT language meaning the chosen Vmp.
smk is saying the controller is what reduces the voltage to battery voltage but the PWM controller does not have a buck converter in it, so it can't do that.
OTOH, an MPPT controller in its PWM mode does still have that buck converter in it and it still works that way, but now the chosen voltage for input is higher than Vmp was and nearer to Voc.
A PWM controller is not the same as an MPPT controller in PWM mode.
If the 12v panel is at 17v that is way past the 15v knee on the IV curve and you would not get any amps
There is no "working voltage" with PWM---that is MPPT language meaning the chosen Vmp.
smk is saying the controller is what reduces the voltage to battery voltage but the PWM controller does not have a buck converter in it, so it can't do that.
OTOH, an MPPT controller in its PWM mode does still have that buck converter in it and it still works that way, but now the chosen voltage for input is higher than Vmp was and nearer to Voc.
A PWM controller is not the same as an MPPT controller in PWM mode.
