We keep our TT plugged in but breakers off to keep the battery charged. Went to pick it up and it was dead. no power even when plugged in But when we plugged it into the truck it began to charge the battery. We were able to raise jack and use lights but when plugged into an outlet nothing. We checked the cord, fuses and breakers and all seems well. Replaced the GFCI circuit and still no power. someone suggested we check the inverter / converter but we have no idea how. Any ideas would be appreciated. Its a 2015 KZ Connect by spree 30 amp and I wanna go camping