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What 50 years? He invented them?
Charles Fritts installed the world’s first rooftop photovoltaic solar array, using 1%-efficient selenium cells, on a New York City roof in 1884.
What 50 years?
Ah, typo in the title, cheers for mentioning it.
I didn’t notice the link to Fritts at the bottom. He certainly does appear to beaten Cove.
