Dear all, I have bought an Orion TR Smart 12/12 30 Ampere NON ISOLATED for my campervan. I have connected that on one end to my Lithium Battery (100Ah board) and on the other to my Motor Battery (77Ah, standard battery plumb). Ground connected to the vehicle. Now, what I notice is that the green light is on, indicating the device works already when the engine is off and alternator gives no energy. In fact, leaving the van with the fridge on for 3 hours, drains the motor. Can you please help me understanding why is the device working when the motor is not on???? This is totally unexpected to me. Many thanks in advice!