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August 31, 2018

100,000 homes in Germany now have battery-storage systems connected to the grid

 

Germany helped make solar power cheap. As of June this year, it boasts 1 million homes that have installed rooftop solar panels. That means the country produces a lot of renewable energy—sometimes more than it can use.

At such times, German grid operators have had to pay neighboring countries or grids to use the excess electricity. Since the beginning of this year, German grids have accumulated 194 hours (paywall) with negative power prices.

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Now Germany is turning to energy storage as a solution to the problem of excess electricity. On Aug. 28, an energy ministry official attended the commissioning (link in German) of the 100,000th home to install a battery-storage system that’s connected to the grid.

Home battery-storage systems can soak up energy from the sun during the day, when typically household consumption is low. Then the batteries can kick after the sun sets and consumption tends to rise. Since 2013, lithium-ion battery costs have fallen by 50%. That’s made the economic case for home battery-storage systems more attractive.

Keep reading on Quartz

 


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