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Most of these chinese sourced, brand of the week labeled units won't hit their ratings, and you're planning on 1000w to 1200w of draw, minimum. You're going to be browning out running the genset at full crank and not necessarrily getting your tires fully up temp, plus anything else you plug in will be very pissed at the shit quality AC you're feeding it. Go bigger so you're not wailing the poor thing for your intended load and your motor will be happier along with everything you plug in.