Hello Pascal
It's Blue Moon again. I didn't realise that Parkers fitted the thermo electic coolers on the 325's, Blue Moon has a proper fridge unit capable of providing plenty of ice cubes for the gin and tonics that the crew crave . The battery drain is not too bad, as example we can leave the fridge on overnight and batteries are not too bad in the morning but I wouldn't do this if I didn't have a separate engine starter battery .
When I am next on the boat I will check out the identity of the fridge unit and it's claimed power consumption, our battery set up is 2 house batteries 120 amp hour each plus a starter battery again 120 amp hour.
Jan
Blue Moon 325/32