Portable panels wire size
Hey guys, I need some help. Would you consider giving me some advice please? I’m putting together a portable solar panel setup. The panel’s will be the following. Max Power: 140Wp Open Circui...
Forum Discussion
AStinker- wrote:
But even though the controller clips the input voltage isn't the input voltage still important in order to get a hi rate of charge when your batteries are in a low state of charge... say a SOC of 50 to 80%?
Not with direct connect or a PWM controller. As I see it, the panel magically matches the battery voltage when the battery voltage is low. A panel with a 17v peak power has plenty of overhead to overcome voltage drop & charge a 12-14 volt battery. At some point the controller limits voltage and the panel needs to provide that voltage plus voltage drop. On a very hot day (lowered V peak) with long wire run, voltage drop would be an issue but becomes less of an issue as the current tapers during this constant voltage charging.
