Climate Changed

Rooftop Solar Boom Set to Spread Worldwide as Costs Plunge

  • One-quarter of Australia’s power will come from rooftop solar
  • Costs of solar energy expected to drop 66 percent by 2040

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G’day indeed! By 2040, rooftop solar panels will supply about one-quarter of Australia’s electricity as declining costs and ample sunlight make photovoltaics the continent’s cheapest source of energy.

In Brazil, as much as 20 percent of the nation’s power will come from panels on residential rooftops, and Germany will get 15 percent from these small systems in 2040, according to New Energy Outlook 2017, a report released Thursday by Bloomberg New Energy Finance. That compares to about 5 percent for the U.S. and India.