I brought my 2021 Tab 320s home from the dealer yesterday and have had a pile of problems since - this one involves the electrical. Nothing in the trailer can be powered by the battery. First I found that the in line fuse was blown so that was replaced. At that point the battery was reading 12.6v. After charging all day on shore power with the battery disconnect set to green (ie, battery was connected) the moment I unplugged from shore, everything shut off. I checked the fuses/breakers in the inverter box and nothing is blown. Everything worked when hooked up to shore power. Is there another fuse to check? Is it possible that the battery just isn't hooked up to the trailer? Thanks for the help.