Dometic CFX fridge running on Jackery?

Does anyone have experience with running Dometic fridges solely on a Jackery and if so, for how long? I read a Jackery can support a Dometic but curious what folks' experiences are. Thanks.

 

Going to depend on a few things... Which Dometic? Which Jackery? Both of the manuals should state what the power draw is while operating, and at idle, and then what the total power capacity is respectively. Then its just middle school math after that. Some VERY rough assumptions made here, but for example...

Say you have the Dometic CFX55 and it says that operating power draw of the compressor is 3A, but idle is .1A for the monitoring electronics. And that you have the Jackery 500. You go on a 3 day trip. Assuming you have charged your Jackery before or en route to the camp site, you have 500 Watt hours to work with (accounting for heat, resistance, other losses can be done if you're that inclined). If you ran the Dometic all 72hrs of that camping trip, you could calculate 3A x 12V x .5 hr (to get it to temp), which = 30 Whrs. Then, assume throughout the rest of your trek despite opening it whenever for foods stuffs, the compressor kicks on a total of 5 times per hour for 1 min, every hour, to maintain the temp, and the rest of the time is spent at idle. 1min = .083 hrs; 71.5hrs left over in your total time.
This gets you to (3A x 5min / 60min) + (.1A x 55min / 60min) = average amp draw per hour = .342 Ah * 12V = 4.1 Whrs
Therefore, your total consumed power for the trip is 500Wh - 30 Whr - (4.1 x 71.5) Whr = 174.8 Whr remaining, or, assuming no losses, about 35% remaining power.

Should be a good place to start

 

Good analysis.
I run a non-Dometic fridge of about the same specs on a Jackery 500. Depending on the ambient temperature and how often it’s opened up I get about 3 days of theoretical power use with no charging.

However I never run it to zero in order to maintain the health of the battery pack, and it gets partially charged when I’m driving on daily outings. I’d recommend faster charging the Jackery with the AC inverter (~78W) rather than a DC outlet (~38W). Just remember to turn on the inverter switch every time you start the engine.

 

I can give you an idea with my cooler setup:

Jackery 300 + my pre cooled to 35 degrees BougeRV 12V Portable 30 quart cooler loaded with drinks and lunch. Temperature outside was 90-100F. I stuck the cooler in the cars back seat and drove to our cabin 2 hours away up and 2.5 hours back home. While parked with windows rolled up it was over 120F. I had cooler in economy mode.

75-80F in the car while driving x 4.5hrs
Plus over 120F in the car x 3 hours while parked = 7.5 hours total
Jackery was at 66% when I unplugged cooler
Total of about 13.6 watts (1.3 amps) per hour

Jackery 300 is rated at 293 watt/24 amp hour. So I can see running my cooler 18-21 hours under these conditions.

Camping using my Jackery 300 as a solar generator: 100 watt Rockpiles solar panel plugged into the Jackery 300 and pre cooled cooler set at 37 degrees plugged into solar generator using pass through mode. Setting directly under the hot sun with intermittent shade on the cooler. Aprox 85 -90F outside temps.

Jackery 300 solar generator stayed between 98%-100% during the day. When sun went down and temps dropped to aprox 50F I woke up next morning and it was at 93%. So with good sunlight and cool evening temps you can expect the Jackery 300 in solar generator mode to easily last a few days camping with just the cooler plugged in.

There are so many variables it's really hard to get exact numbers. I hope my usage results helps a little bit....