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Sonnen is the German market leader for lithium storage systems. It was founded in in April 2010 with technology that was under development since 2008. The company specializes in the development and manufacturing of next generation smart energy storage systems with a storage capacity range of 4.5 kWh to 60 kWh and above. Over 4,000 Sonnen units have been sold throughout Europe. Sonnen allows the user the self-consumption of solar panel generated electricity and a reduction of the electricity bill by up to 90%. The company is headquartered in Wildpoldsried, Germany with offices in Los Angeles, California. Sonnen was acquired by Shell in February 2019.



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