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...
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The hard core tech guys are going for as little line loss as possible between solar and controller. Your panels might in the perfect world, sun at perfect angle and perfect temp hit there max of 25 amps at least for a minute or two.
I understand your confusion as I just went through this as well. I have 200 watts on my trailer roof and 35 to 40 feet of 12ga wire to controller. Controller is about 6 feet from batteries with 4ga wire. I have a 20 amp inline fuse at controller and 40 amp fuse between controller and batteries. The kit I purchase came with the 12ga wire, if I knew what I know now I would have purchase a roll of 10ga twin lead from e-bay and used that. I now have a roll of the 10ga and will rework my wiring when I decide to put 2 more panels on the roof. The 40 amp fuse between controller and battery was in anticipation on have 400 watts of panels but due to other trailer repairs I haven't purchased them yet and I am wondering if I really need another 2 panels. My 2 week trip the end of the month will be the deciding factor on the other 2 panels.
I understand your confusion as I just went through this as well. I have 200 watts on my trailer roof and 35 to 40 feet of 12ga wire to controller. Controller is about 6 feet from batteries with 4ga wire. I have a 20 amp inline fuse at controller and 40 amp fuse between controller and batteries. The kit I purchase came with the 12ga wire, if I knew what I know now I would have purchase a roll of 10ga twin lead from e-bay and used that. I now have a roll of the 10ga and will rework my wiring when I decide to put 2 more panels on the roof. The 40 amp fuse between controller and battery was in anticipation on have 400 watts of panels but due to other trailer repairs I haven't purchased them yet and I am wondering if I really need another 2 panels. My 2 week trip the end of the month will be the deciding factor on the other 2 panels.
