Hi,
Is it ok to connect GND on the Orion directly to the negative/ground terminal on my leisure battery? The negative terminal on the leisure battery is connected to the aluminium chassis (camper van), same with the starter battery. So the Orion, the leisure battery and the starter battery will all share a common ground, I just want to double check if there is any problem with having the Orion connect to ground via the negative terminal on the leisure battery, as opposed to having it's own negative connection directly to the chassis?