The Alternative Energy Store was created in 1999 by three engineers who thought that renewable energy products should be offered to consumers along with free educational materials. The store seems to have most things one could be looking for, from books and videos to wind turbines, solar panels, hydropower equipment, various low-power appliances and lighting fixtures, batteries, composting toilets, etc. It is located in Worcester, Massachusetts (USA) and has sold equipment as far as Antarctica (to a research facility). To learn more about alternative energies and how to install a system, you can go to what they call the "Alt-E University", and each product page also has a fairly detailed description and specification sheet. You can even chat with other renewable-energy pioneers on the forum. While you're at it, check out this beauty.