Here is an interesting site for alternative energy
http://www.energyalternatives.ca/default.asp
Unless you have a lot of money I don't think these will help you get totally off the grid.
For example...... a 1.5 KW system will cost $10K and will generate peak power in the summer of 7kw's. With all the lights & pumps reefers use........ that would just be a drop in the bucket.
These systems can help offset power use ...... but the pay back would be a very long time.
Cheers,
Vic