[Ameiseuk]

Originally Posted by David's8

However, I do note that the instructions recommend disconnecting the battery from the vehicle's + and - system before charging. This is stated in the safety warnings section at the start so I am not sure whether this is a 'elf and safety "issue" or for any other reason. Any idea why this should be?

Most chargers will recommend disconnecting battery terminals while charging just in case they fry electronics - it's the normal 'get out of jail free' clause in case anything goes wrong.

I would suggest disconnecting terminals on a cheap lidl/aldi charger however ctek should be fine.

I have a battery disconnect switch on my campervan which I turned off when using the Lidl charger- just in case.
I've now changed this to a CTEK as accessing the Lidl charger to press the mode button every time I connected to the mains was a bit of a faff.
I've yet to turn off the isolator switch using the CTEK.