OP question:

"The conclusion is that the Freezer can only be run for 8 months of year off grid. Is a partial off grid solution just to much of a compromise?"

Apparently my earlier questions were wide of the mark, so let me address the original posted question another way. What would be the criteria or standard for determining if the compromise was too much?

If economic, a cost-benefit analysis of the proposed system versus a purely on-grid system over their useful lives should suggest some answers. In the U.S. that would include original and projected costs, tax-benefits, etcetera.

If value is assigned to self-sufficiency [priceless?], then the question would seem to be, is this the best that can be done to provide freezer storage powered by off-grid sources? In my area of the U.S. for example, in addition to solar, winter winds might offer added power generation opportunities. I am also told that heat exchange setups using buried elements that take advantage of the differences between ambient below-ground and in-home temperatures can provide power, perhaps year-round.

If the question is simply does the proposed plan make sense to the OP, only the OP can answer that.