I found myself in Death Valley again this May in similar temps as last year, so I thought I would report back on my results.
Late last summer, I discovered I was having intermittent charging issues with my National Luna system. After swapping parts around with the help of Paul from Equipt, the problem persisted. After several months with no solution, I got a bit frustrated and ditched the system altogether in favor of a Blue Sea ACR. I also replaced my ARB fridge wiring with the ARB fridge harness and the new style plug connector.
I am happy to report we were parked for 3 days straight in 90+ temps, solar panel deployed and I did not have to run the Jeep at all. The solar kept everything topped off, and in fact we had power to spare. I will say we did bring a separate cooler for drinks, more of a convenience issue, so we were not working the fridge as hard, but I am so much more confident in the system then I was a year ago.
It's been quite the learning process, but it's a great feeling when it all comes together. Thanks again for all the help!