Sonnen Considering IPO in Bid to Rival Tesla Powerwall Storage

  • Sonnen gains China’s Envision Energy as stakeholder before IPO
  • Goldman Sachs sees boom in European power company investments

Sonnen GmbH, a German solar-energy-storage maker that competes against Tesla Motors Inc.’s Powerwall battery, may pursue an initial share sale as early as 2017 to develop additional services.

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