I just heard about this site as the survival podcast had him on twice and REALLY got my wheels spinning. Especially the bio gas bit. They didn't mention, but seems like it would be able to handle your refrigeration needs and even easier if combined with root cellar level insulation!
Off the shelf or used propane refrigerators require a very small flame to give lots of cooling.
considering refrigeration would be a major draw of electricity, maybe a biogas version would allow for a smaller power system! Id love to hear any thoughts on this. Seems like lots of upsides, (the by-product is great
compost) AND I know a guy who can fix LP refrigerators locally in Post Falls!
Anyway, here is what i found and there are tons of links and rabbit trails from there. I recommend checking out his podcast with Jack too.
http://www.solar1234.com