As people have been saying for decades, much of the future of energy is solar, though perhaps not in the form people currently imagine it.
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Futurist Ray Kurzweil even predicts that in less than 20 years solar power will be so inexpensive and widespread that it will meet all of our energy needs. In the U.S. alone, solar capacity has quadrupled since 2010, according to the U.S. Energy Information Administration.
But over the next two decades, how it is captured will begin to look a lot different, Cascio said.
"If you think about a world where everything produces energy, everything that touches light produces energy, again you have the idea of a transformation on your hands," Cascio said. "The idea of energy off the grid really comes down to be able to generate it easily and be able to store it in volume."
Advancements in photovoltaic materials, such as photovoltaic paint or glass, will help power homes alongside panels. It's about "building a world where everything that is touched by the sun would create power," Cascio said.
And it won't be long before we begin to see these kinds of materials in our homes, Cascio said.
Some high-end homes could have this kind of technology in five years and in ten years it may even become more widely available in home improvements stores.
But even though improvements in solar tech are right around the corner, it could be a while before batteries get the improvement needed to really simplify living off the grid.
"The solar side of stuff is relatively near, but the battery question is waiting for a wild card breakthrough," Cascio said. "But I would be really shocked that if in a 25 year time frame we didn't have this breakthrough in batteries. But it could be next year or it could be 15 years from now."
—By CNBC's Cadie Thompson. Follow her on Twitter @CadieThompson.