What do folks do with the fridge on overnight ferries? Is it ok on 12v for the trip. We have 2 95ah leisure batteries but not sure if this is allowed or the done thing. Thanks in advance!!
I assume that you are talking about a three way fridge, 240V, 12V or gas. With this type of fridge I use to freeze plastic bottles full of milk and place ion fridge. It keeps the food cold for a long time (providing that you don't keep opening the fridge door) and the milk can be used later.
If you have a 12V only compressor fridge you can leave it on overnight with no problems whatsoever - assuming that you habitation battery has a good charge to start with.