The two photos above show a small makeup chiller that keeps items 20 degrees below outside temp. My little Jackery should run it for 5-6 hours possibly 24/7 if hooked up to a 50/60 watt solar panel and clear sky’s during the days.
Here is my little Jackery 290. I ran my 32 qt freezer with it, after 5 hours I had only used 30% of my Jackery power. This tells me I could run it for over 12 hours if needed. Temperature stayed within 2 degrees of zero the whole time.