I just did a simple and not terribly scientific 24 hour test on the amperage draw for the fridge. I logged our amp/hr draw from our Link 10 at certain intervals. The only other DC draw during this time was cabin
lights and I logged when they went on, how much they drew and when I turned them off. I added up their amp/hrs and pulled their draw out of the total. The water
pump kicked on a few times but not enough to track. Based on my calculations, over the last 24 hours the fridge pulled 9.8 amp/hrs out of our battery
bank. I'm pretty happy with that result. However, here's a list of caveats on why this is not a terribly realistic number long term:
* yesterday and today, the outside temperatures ranged from 45F to 50F and being Seattle
, I don't think the sun ever hit the hull
* the water
temps here are 46F.
* the temperature inside our cabin
is kept between 65F and 68F over the whole 24 hours
* there's only one person on board right now (me) and I was gone for a good part of the day. I opened the fridge whenever I needed something but it wasn't that often (< 10 times) and I never had to root for something all the way at the bottom.
* I didn't add any new items to the fridge that had to be chilled.
* this was only 24 hours, far too few data points to draw any long term conclusions from.
Those are pretty much ideal conditions for a fridge to be run in. I expect the real life cruising numbers to be higher. When I finalize the wiring
on the hour meter on the compressor
I'll post some more long term usage results.