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Why Balcony Solar Panels Haven’t Taken Off in the US
(www.wired.com)
This is a most excellent place for technology news and articles.
I just took portable ones and ziptied them to my balcony connected to a solar generator. Works to feed all my electronics and server equipment. It only connects to the grid if its depleted, never feeds power back in.
So you can still do this in the states, so long as you're not feeding into the grid.