We have had another look at the inverter and it is specifically a Superex AC toDC inverter square wave 400 watt. It looks as though it is a heavy gauge extension cord that runs from the inverter to the plug. Do we need to check anything else??

The cord I was going to use was a builders extension cord that my husband used for 13 mp tool. Thank you!!

Good day I have a Res Med auto set S 9 with the H5i heated humidifier. We full time in an RV and do not have a built in generator and it is not always appropriate to use a portable generator. We have two Kirkland batteries that are each 95 amp hours. We have a modified sine wave 400 watt inverter. T...