Rockrat,
I just went out to my PC to test your condition. Inverter reading was 12.2, I started the generator by pressing the start button and holding it. The proper way is to press and hold the stop until the light comes on, it is now primed, then press the start button. I wanted to try it the way most folks seem to do it by just using the start button. I then waited about a minute for the generator to kick in and for the microwave to start blinking it's message. I hit 1 and start. It lightup and then displayed done. Next I hit 2 and the same thing happened. I could not hear it running because of the generator noise. I did not have anything to put into it, so I could not run it longer. Now that I am thinking about it, I guess I could of used a cup of water in it. Oh well. I then went to the thermostat and turned on the A/C. It started right up. I tried to turn off the battery disconnect with the genterator running and it would not turn off. After I shut down the generator, I was able to turn off the battery disconnect. I think Bobander is on to something here in his post above.
Over the weekend we went camping. When we went to leave, we stopped at the dump station and the electric dump handles would not work. I got under the motorhome and tried to pull the black water handle. It would not move. I tried the gray handle and it did open. I have added a spigot in the hose line to allow me to break the water vacum after dumping. I had just proudly shown it to my friends before leaving my site.

After getting the gray value open and still laying on the ground by the motorhome, I turned on the pump. Yep, you guess it, the pump worked, pumping gray water out the spigot all over me.

I did not know that gray water could smell that bad. To top it off the wife was standing there watching the whole thing. From now on when I remove the cap on the hose it is going on the spigot before I do anything else. I went to the bath house and washed up, but it was still a long ride home.

That evening at home, my wife noticed that the battery disconnect was off. Turned it back on and everything works. Two showers and a day later it has become a funny learning experence.
I would not assume that because someone else had a bad inverter, that you have one also. Theirs was several months ago. Call the factory and ask them about your problems. As you probley already know they are very helpful.