Correct me if I was mislead, but I was informed by Thor that 2016 and above Xantrex inverters are all true sine wave.
As for the original question, If you request the wiring diagram from Thor for your coach, you will see that only 5B receptacles (at least on Challenger 37LX) are connected to your inverter. Those are used for your refrigerator and televisions. You can wire additional receptacles but more than likely you would need a larger inverter and battery bank as the original design is only to support the refrigerator and occasional television use.
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