Wire distance same for Positive/Negative

Farmerboyz1721Farmerboyz1721 Registered Users Posts: 39 ✭✭
Is it a good idea to keep the positive and negative wires the same distance? 

I have three solar panels wired in series. The negative side is only 1 foot from the junction box but the positive side is 17' from the junction box. Is it best to make both leads the same size(the longest length)? So make the negative 17' as well?


  • vtmapsvtmaps Solar Expert Posts: 3,738 ✭✭✭✭
    They do not need to be the same length.   Do these panels have built in cables and connectors?  If so, do not cut them to make them shorter.

    4 X 235watt Samsung, Midnite ePanel, Outback VFX3524 FM60 & mate, 4 Interstate L16, trimetric, Honda eu2000i
  • Farmerboyz1721Farmerboyz1721 Registered Users Posts: 39 ✭✭
    Thank you!
    Yes they have cables and no i will wont make them shorter. 

  • zonebluezoneblue Solar Expert Posts: 1,218 ✭✭✭✭
    Maybe its pedantic but i do prefer the pos and neg of all wiring to be near the same length. That minimises induced surges, however ill agree that the modules themselves are an awfully squiggly antenna of its own. As far as each string goes it doesnt matter the length because the internal resistance of the modules is quite high.
    1.8kWp CSUN, 10kWh AGM, Midnite Classic 150, Outback VFX3024E,

Sign In or Register to comment.