If someone would manufacture a refrigerator with this quality and insulation I would buy it in a second. Would be able to quickly get rid of one battery and the second solar panel.
ARB has been making a top loading frig with these characteristics for years.
However, a comparable frig will never be as efficient as a cooler because of the ports that must be cut/manufactured in a frig. But, the ARB frig is far more efficient than 99% of all rv/camper refrigerators installed by the factory. Plus, the biggest feature to saving battery power is top opening vs side opening. Each and every time you open the door on a side opening frig, all the cold air literally falls out. The frig's compressor will now have to run an extended period of time to return the inside of the frig to your cold setting.
I wish a top loading frig was a factory option.