German battery maker sonnen files for insolvency

· Energy · Germany

German residential battery storage manufacturer sonnen has filed for insolvency in Germany, months after Shell sold the company to family office Tiven. The company says it plans to continue serving its more than 150,000 customers while it restructures or liquidates several subsidiaries. The filing contrasts sharply with sonnen's US business, which says sales have doubled and is preparing to expand. sonnen is one of the best-known names in home battery storage, built on a model of selling systems alongside energy-management and virtual power plant services, and its German arm's collapse comes as the residential storage market faces pricing pressure and shifting subsidy regimes.

Why it matters：The insolvency of a high-profile European home-storage brand tests whether residential battery makers can survive without generous subsidies, and its outcome will shape consolidation across the sector.

Key points

  • Shell had sold sonnen to family office Tiven before the filing.
  • The company serves more than 150,000 customers and aims to keep operating through restructuring.
  • sonnen USA says its sales have doubled and it is preparing to expand.

Sources (original reporting)

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