What solar panel specs are used for calculating voltage loss
Which solar panel specs are reasonably used for calculating line voltage loss?
Forum Discussion
I used expected total output current of the panels vimp..The working current
Voltage drop is line resistance times amps
At 30 amps 14v or 30 amps 120v the drop is the same for the same cable...
But 1.0v means almost nothing to120v but means a great deal to 14v
Line losses from panel to controller mean very little to PWM, because anything over the output set point is not used
But line losses between controller and batteries mean a great deal. , lower voltage charges the batteries slower
If the set point is 14.2v
You want to get 14.2 at the batteries not 13.8 Or 13.2 etc..
Even with MPPT the controller output side is more important than the input side, and the higher the voltage on the input side the less effect the drop will have
Voltage drop is line resistance times amps
At 30 amps 14v or 30 amps 120v the drop is the same for the same cable...
But 1.0v means almost nothing to120v but means a great deal to 14v
Line losses from panel to controller mean very little to PWM, because anything over the output set point is not used
But line losses between controller and batteries mean a great deal. , lower voltage charges the batteries slower
If the set point is 14.2v
You want to get 14.2 at the batteries not 13.8 Or 13.2 etc..
Even with MPPT the controller output side is more important than the input side, and the higher the voltage on the input side the less effect the drop will have
