Joe Parsons wrote:

I'm confused. If you're connected to shore power, why would your
generator ever have to kick on? Do you not have some sort of battery
tender?

I think what he's saying is that it's connected to shore power while he's at
the dock, and that's fine. But when he takes it out on the water for a
couple of days, he has to use a generator to power it, since it's AC only.

It seems to me that blue ice would do the trick. It would get thoroughly
frozen while at the dock (with shore power) and then the fridge would just
act like an ice box while out on the water. If he was out long enough that
the blue ice all melted and he needed to power the fridge again, he'd have
a choice: Leaving the blue ice in the fridge would mean it would take
longer (more fuel) for the generator-powered fridge to refreeze everything,
but he could go longer before having to power up the generator again.
Taking the melted blue ice out of the fridge would make cooling the
contents easier (more efficient), but he'd have to do it again sooner.

Of course, if he has enough blue ice, and he's only disconnected from the
dock for a couple of days at a time, he may never have to fire up the
generator. More insulation would help, too.

Shawn.