Solar power’s rapid adoption is because it is the least cost way to produce electricity. Every kilowatt-hour produced by solar saves money versus a kilowatt-hour produced with fossil fuels. When solar power is unavailable, then more expensive fossil-fuel generated electricity can and will be used.

This graph shows solar’s growth since 2016

Supporting Materials

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Solar power got cheap. So why aren’t we using it more?
Utility-Scale Solar is the Least cost
Levelized Cost of Power 2017