What, you expected the dealer to be of help. Anyhow, you have an undercharged battery and the inverter is displaying an under-voltage shutdown. Get the load off the battery, ie. outdoor refrigerator, TV's. Then charge the battery. Check the battery voltage with a volt meter with nothing connected. As to where your inverter is located, probably close to your converter panel. Here is a site that will tell you more than you wanted to know about your inverter.