for the right $ you can go completely "off the grid". whether or not this is economically good for your wallet, cheaper. depends on a lot of factors. i think the best use of solar panels, at this moment, to save money, would be to use them to charge your batteries connected to your inversor. this way you don't need a large bunch of panels, expensive, and keep in mind that charging those batteries from the "grid" sucks a lot of juice.
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