Solar Wire Size..??? Fuses on panels...??
Ok, ready to install my solar system and I need to buy wire to go from panels to the solar controller Two, 140W panels, wired in parallel Here are the specs on the panel: The wire lengt...
Forum Discussion
#12 is fine by my calculator(16+ volts at controller), kill it with #10.
http://www.genuinedealz.com/voltage-drop-calculator
You don't need more than 15 volts at the controller as the controller or battery will drop the voltage to 14.8 or less. #4 wire will have 17.7 volts at the controller and still just get clipped by the controller or battery.
What you really get is Isc 17 amps until the battery voltage rises to the controller set point. Then amps taper off like normal and eventually controller drops voltage to float.
No fuse needed with two panels. (series fuse rating is 17 amps or two panels)
http://www.genuinedealz.com/voltage-drop-calculator
You don't need more than 15 volts at the controller as the controller or battery will drop the voltage to 14.8 or less. #4 wire will have 17.7 volts at the controller and still just get clipped by the controller or battery.
What you really get is Isc 17 amps until the battery voltage rises to the controller set point. Then amps taper off like normal and eventually controller drops voltage to float.
No fuse needed with two panels. (series fuse rating is 17 amps or two panels)
