Solar energy costs in the United States have plummeted more than 100-fold since 1977, and that’s just the first of 13 charts on solar panel cost and growth trends published last week by CleanTechnica. Average panel costs are down from $76.67 to $0.613 per watt in the last 37 years, and “the cost of electricity from solar panels is now lower than the cost of retail electricity for most people,” Shahan writes. “That means people like you and me (if we have a roof) can cut our electricity costs by putting solar panels on our roofs! This is why major companies like Walmart, IKEA, Google, Apple, Facebook, Costco, Kohl’s, Macy’s, Staples, and many others are starting to go solar in a big way.”
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