Refrigeration has come a long way in efficiency. I have 330 watts of solar, modest by today's standards. In the tropics it was enough to keep an old Grunert holding plate system cold. A few years ago the Grunert was ripped out and two Adler-Barber cold machines took it's place. One is for the freezer. That change, along with a rebuild of the top cut power demand considerably. I did not anchor based on sun or wind availability. I do have a wind generator but it gets more use on passage that at anchor.