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German solar battery maker Sonnen qualifies to provide grid services

FRANKFURT: German solar battery maker Sonnen has won approval to join the lucrative market for keeping the country’s power network in balance, giving a boost to its drive to reach profitability. Jean-Baptiste Cornefert, head of Sonnen’s eServices retail unit, told Reuters it had been accepted by Germany’s biggest power grid firm TenneT to join the […]

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