Can I use 4awg wire for my inverter

opnspaces wrote:
I want to use my 600W inverter on my trailer. My current plan is to mount it in a box on the tongue keeping wire length to about 18 inches.

My question: I have a lot of 4awg wire that I used years ago on a hot tub at home. Can I use this wire on my inverter? It's very stiff and not at all flexible like the welding cable that everyone suggests.

While I'm always in favour of making use of parts I already have in my workshop I'll only do that if it's suitable for the task at hand. Considering that flexible, purpose designed battery / starter cable already terminated with appropriate ends is readily available in a variety of gauges at moderate cost I'd pass on stiff wire that's not really intended for the purpose. Once the weather warms here I'll be doing just this myself, replacing a flooded battery that's been sitting on the trailer tongue and connected to my inverter which is mounted in the front pass through cargo compartment with 6' of 4 gauge cable. In it's place I'm mounting an AGM battery in the pass through and replacing that excessively long 4 gauge with 18" 1 or 2 gauge starter cable. I could cut up the existing 4 gauge cables and re-terminate them again but for the minor cost of these starter cables I wouldn't even waste the time.