The 10 gauge is to light for what you want to do. I wouldnt try to feed it through with the old wire. As I said before the easiest way is to go through the roof to the utility room where you would probably want to put your solar controller then though the floor to the basement to the inverter...
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2008 MS 4212 2007 Freightliner M2 MountainMaster..2012 Victory Cross Country behind the cab. 2011 Honda Fit pushing the FL and the MS
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