There is little technical advantage to using 12v directly instead of an inverter driving a regular unit. I would look at the cost of each.
I would also look at the modest cooling, good for one compartment such as the forepeak, and the lifetime of batteries at 50A draw.
1975 32' Flybridge Sedan, twin Perkins 6-354 diesels, 1:1.53 velvetdrives, 16 X 19 props. Merritt Island, Florida