Ron,I also have the pure sine wave model. What Gandalf means is that if you turn OFF the inverter then plug into shore power the inverter automatically turns on. And when shore power is removed the inverter stays ON, whether you want it to or not. You are correct that the inverter alone will drain the batteries even if nothing else is running. I practically drained my batteries the first week home because I made the assumption that when I turned the inverter off it would stay off. But it doesn't, if you plug into shore power even for a minute the inverter is back on.I have not looked in the manual but maybe there is a setting that will change this behavior. I would prefer the switch control the behavior, it is too easy to forget to check it after every stop.
Maybe this is common knowledge but was a surprise to me. When I plug in the RV the inverter is on..no problem with that. But when you unplug the RV the inverter stays on, adding a power drain to the batteries. You have to manually shut it off each time.I had seen the battery voltage display but thought that was it, just the display was on, not that the inverter itself was on... until one night I noticed that the TV power light was on. This is different from my previous RV where you had to turn the inverter on and off manually, so caught me by surprise.I have the pure sine wave inverter and the battery monitor shows a 4.4 Amp draw for the inverter while it is on.
I would check with Kermit. On the square wave inverters, if off, they do NOT come on with either generator or shore power. If on, they will stay on, if off, they will stay off. It sounds to me Iike something is mis-wired. You could also call the inverter manufacturer to ask if that's normal behavior or not. In either event, they should not draw 50 watts (4.4amps @12v) when nothing is turned on. If my memory is correct, you wanted more outlets added to the inverter line than normal.... If so, what is plugged into those outlets?
Shore power goes thru the xi2000 as the transfer switch is part of the inverter. Thus, it turns the inverter on so that if shore power is lost, the inverter will immediately take the load.Since the pure sine wave inverters are used with sensitive electronic equipment, they need to swith power source within a few cycles of the AC wave without spikes or total dropouts.It's the equivalent of an Uninteruptable Power Supply (UPS) which the square wave is not. The turn on with shore power is designed in.