Our Bailey Pegasus GT65 has a 'cigarette lighter' type connector in the battery box, intended for use as a solar panel input. Is there any reason I can't use it as a convenient 12v outlet for outside the van? We have the 240v plug outside too, but I have a couple of devices that run using the 12v lighter plug and wondered if they would plug in here? The only reason I can think not is if there is a diode in the way to make it input only, for possible fear of draining the battery or having something plugged in that sits outside the protection of the fusebox and master switch.