Samlex America(PST200012) 2000W x 12V Inverter

I purchased this because of its UL458 rating, which means its a good inverter. I've used it to power a microwave that draws 1800 watts with little problems. Because this pulls a lot of amperage when it does this (155 amps) I am using 4/0 wire. Need to look at ampacity of wire, temperature rating, and also the voltage loss before installing. Placement of a few feet off will drive thicker wire ratings.