I measured it with my fridge attached and wrote it down somewhere - at the fridge it was something like 12.7V with the engine running (as I use the powered pin from the car). I'll see if I can find the exact figure.
Cheers,
Gordon
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Was that running a 3-way or a compressor fridge?
Just went down to the car to check my trusty notebook, and I'd logged the figures there. Not as good as I recalled :(
Engine running and 13.4V at the battery, I got between 11.9 and 12.1V at the fridge. The regime was to run the caravan fridge off the car during the day travelling, so never more than 9hrs at that voltage.
Cheers,
Gordon