Update.... I bought the panel and have been running it for the last 6 weeks.... here is the take away. I use my fridge everyday and it never turns off, I eat out of my truck 6 days a week on the jobsite.
First off, here is the gear being used.... Iceco VL75 pro with both sides set to 32 degrees F (fridge location is inside the cab)... Jackery 500 (located inside the center console)... F150 solar panel hood from Lensun Solar. Remember, I live in Central Texas average weather involved is about 95 degrees F for what I'm gonna post below, winter time (avg 40) and middle of summer (avg 103) will yield different results.
Okay, the Jackery 500 will run the Iceco for about 20 hours and I plug the jackery into shore power and charge overnight while it is still powering the fridge, 100% by the time I leave for work. I needed something to ensure the Jackery would not die when I park the truck at a campsite for the weekend... what I have found is that the Solar panel offsets the juice pulled from the fridge, so the percentage of battery drops at night..... so below is the schedule I have found for the battery running the fridge. And these are averages, I'm not a scientist, but I did drop out of medical school, so I'm basically a doctor in New Jersey hahaha.
Day #1 - 6am - Battery 100%
- 7pm - Battery 100%
Day #2 - 6am - Battery 60/65%
- 7pm - Battery 60/65%
Day #3 - 6am - Battery 20/25%
- 7pm - Battery 20/25%
Day #4 - 6am - Battery 0%
So all in all this is a range extender, not and off-grid solution. Hope this helps.