BFL13 wrote:
"On a sunny day my solar can produce as much as 26 amps and I think my refrigerator only about 8/10 amps. "
My 6cu ft Norcold pulls about 350w on 120v so that is about 35 amps DC via inverter. I had lots of solar but it could not keep up with the fridge, even at high noon. Gave up on that and now leave the fridge on propane after trying that.
You would only slow down the draw on the battery by running the fridge on inverter with whatever amps solar is doing at the time. A few more amps via 7-pin would help if only they were at the same voltage as the solar, but it would still not be enough to supply the fridge's inverter draw completely.
I know the refrigerator uses alot of amps on startup not sure what my number is but much less once the refrigerator reaches cold. Then it depends on how much you access the fridge and maybe how hot it is outside. It could go hours before it cycles on and off while traveling.
Down the road I may add a 40 amp DC to DC charger.
Like I said I usually run the refrigerator on propane when towing if there is too much of a draw and it starts to drain down the batteries I will switch it back to propane.
It will still be nice to have energized outlets when stopping for lunch or a break without having to go outside and plug into the Inverter.