I'm planning on installing a few 12v plugs/chargers to my camper van build - 2 of the Blue Sea USB charging ports, 2 of the cigarette lighter type ports, and also one of the Blue Sea LED voltmeters. The USB chargers will charge iPhones. The other plug may power a 19" 12v TV. Could all of these be wired together on one circuit? And if so, should they be wired in parallel?