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We installed our first PV panels around 1982 or so, when the dollar was worth a lot more and PVs were a lot more expensive, so that the effective cost was a LOT higher than it is now. And the utility charged 3 cents a kw-hr back then, too. They still work fine, should continue for decades, and have paid for themselves in the value of energy produced. If you wait until they are as cheap as they are going to get, you will wait forever, and then discover that you missed the opportunity. The way prices are going now, and rebates etc are dropping, it is a good time to get started today.
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