Solar Refrigerator advice please

Let me say first that I am in the process of downsizing and selling my property in preparation for using my equity to purchase small rural acreage for an off grid home base and then I plan to build out a rig to travel in part of the year but also live in when at my home base. I thought I wanted a chest type refrigerator such as the Dometic CFX-100W (about 8 CF) it is a 12 Volt system that uses 1.5AH/h. More recently I been considering something larger and upright.

The refrigerator I'm considering investing in is an upright for off-grid use that is 16.6 CF and is a 24 Volt system that has a DC cooling system (Danfoss/Secop compressor), the UGP-470L1 and states that it only draws 865 Wh/24hrs (in a +25°C/77°F ambient, set at -14°C/+7°F in the freezer and +4°C/39°F in the refrigerator) like this https://refrigeratorfaq.com/best-compac ... zer-combo/ I was going to post a link to the refrigerator but since I'm not sure if that is allowed in this forum I haven't done that.

I have several questions if anyone is knowledgeable about the 12 volt and 24 volt systems. I want to how do I compare the Wh usage from the 24 volt system refrigerator with the Ah usage of the 12 volt refrigerator. Also, I assume I'd have to wire the 12 volt AGM batteries, that I plan to buy, in series to achieve the 24 volt system, but I'm not sure how much solar and batteries I would have to dedicate to this refrigerator. I'd sure appreciate some advice from some of you with experience in these systems. Thanks!

They both use 1.5 Amp Hours.
https://www.convert-formula.com/ah-wh/

AS to living off the grid.
Solar is dependent on your Latitude as well as night time and cloud cover.
Batteries are dangerous and require both attentive monitoring and maintenance.
Hydrogen gas evolved can be explosive if contained and not properly vented not to mention the extreme hazard from short circuit.
Best to find a ‘Qualified’ Electrical Contractor and Electrical Engineer to design and stand by your system.
How much solar output and battery storage will be dependent on your usage, Latitude and how much storage is required for when night or clouds reduce current from your solar array.
BTW, don’t wire the batteries your self with simple jumper cables or anything else.
Have a qualified Electrical contractor do the work.
If your batteries are charged and you make a mistake.............
-Richard