First let me start by saying this is not a plan on how to exactly build an Off Grid Solar System. Depending on what type of solar module or modules you use or what type of charge controller and battery you use. The plan can come out completely different.
This is more of an overview of a simple system I built with what I had available. But.. It does stand as a very good model for a simple Off Grid system that's got a little bit of umph behind it.
I have ran off this trailer such things as a small refrigerator, a skill saw, several drop lights, a Sawzall with a drop light, ghetto blaster and 3 strings of xmas lights all night, electric tea pot, and the list goes on.
So the story goes something like this. I was going to Burning Man with my work http://www.eesolar.com/ to build 9 solar arrays. First a 14k array for our camp to serve as a public charging station for electric art cars, camp batterys and, anything else under the sun (laptops, ipods, flash lights, vibrators, what ever). Then we built arrays to power 3 more camps and finally we fitted 5 major art installations with smaller solar arrays (1 to 2 k).
I needed a way to run power tools to build the other arrays so I came up with the idea to retrofit this cheapy kid bike trailer that I got at a thrift store for 8 bucks with a 80 watt solar module, 150 amp hour battery, charge controller and, 400 watt inverter.
The idea is that I can attach my trailer to my bike with the solar junk and ride to other camps that don't have power and work on stuff. Now that I'm home I can ride my bike to anywhere there's a party happen'n and make the scene.