What solar panel specs are used for calculating voltage loss
Which solar panel specs are reasonably used for calculating line voltage loss?
Forum Discussion
With the 12-12 PWM, you will use battery voltage for both the panel to controller path and for the controller to battery path.
Your "expected amps" at STC with two panels is twice the Isc of one panel (with panels aimed at a high sun) when the battery voltage is between 12 and 13
When battery voltage is between 13 and 14, the amps are a tad less (see the panel's IV curve)
For wiring set up, pick say 13.5v and 20 amps. Anytime amps are lower, line loss will be less. Most of the daytime, panel voltage will be between 13 and 14, so that is why I would pick 13.5.
Your "expected amps" at STC with two panels is twice the Isc of one panel (with panels aimed at a high sun) when the battery voltage is between 12 and 13
When battery voltage is between 13 and 14, the amps are a tad less (see the panel's IV curve)
For wiring set up, pick say 13.5v and 20 amps. Anytime amps are lower, line loss will be less. Most of the daytime, panel voltage will be between 13 and 14, so that is why I would pick 13.5.
