No, not worth it. . . electric bills are very sensitive to amount of usage during times of day and year. Best to get a really good analysis for your usage, as $500 is alot for most houses.
My boss installed solar, and the next summer the region had the highest annual percentage of cloud cover days in recorded history. . . LOL! spending X $ to save maybe 50 per month is a losing proposition, is a cost minimization strategy, and I prefer an income maximization strategy.
but then again, i am in finance and work for an gas and electric utility, and have a small understanding of the economics.
finance guy
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