Cable Gauges
When connecting the inverter to a battery bank use the thickest stranded
insulated copper wire available in the shortest length practical. If the inverter &
the battery are positioned within 4 FT of each other, a minimum of #4 gauge
wire should be used to make the connections. When the distance between
inverter & battery bank is 4-6 FT, a minimum of #2 gauge wire is required.
Owner's guide You have twice the distance and half the wire.
http://www.donrowe.com/product-p/awg30-10.htmThe AGM helps and still you really need another battery or two.
