The link above demonstrates a nice DIY version of a solar array, using damaged solar modules that can be bought at low price on eBay. This resourceful astronomer also built himself a DIY wind turbine, so if you’re considering doing either, this is worth a look.
This panel was designed to work in sunny Arizona (a beautiful state!), which is a perfect place for setting up an array, especially given the large number of off-grid properties there which would be prohibitively expensive to wire up to the utility power company.
He includes lots of good tips about what to look for when buying your solar panel modules to string together into the final product, so you can learn from his mistakes, and also know a bit more about what is actually important to the functioning of the modules. Above is a picture of the finished box containing the panel. Good luck with construction!