When you think of “living off the grid” you probably conjure up images of dirty hippies wandering the forest. The reality of modern eco-friendly living couldn’t be more different. With the help of Realtor.com, Sotheby’s International Realty…, Coldwell Banker Previews International and Prudential Douglas Elliman, we’ve found available homes touting self-sustainable energy options capable of going off the grid. Oh yeah, did we mention they’re mansions? Check them out!