Day 199 of 365
July 18
T
Technology Solar Energy Technology
Solar panels convert sunlight directly into electricity using the photovoltaic effect, discovered in 1839. Panel efficiency has increased from about 6% in the 1950s to over 47% in laboratory conditions today. Solar is now the cheapest source of electricity in history in sunny regions.
Did you know?
The sunlight hitting Earth's surface in one hour contains more energy than humanity uses in a year!
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