WHAT HAPPENED

According to Salzgitter AG, Zelestra will build and own the two hybrid plants, while Salzgitter Flachstahl will buy their solar power and control battery operations. The batteries will be charged exclusively with surplus electricity from the associated solar plants. The companies describe the contract as their first hybrid PPA in Germany; Zelestra also characterizes it as Germany’s largest hybrid deal to date, a ranking not independently established by the supplied source.

MetalMate summary of the linked evidence
WHY IT MATTERS

Commercial context

Analysis: Combining contracted solar generation with storage should give Salzgitter greater flexibility in matching renewable-power availability with steelmaking electricity demand. Salzgitter identifies hybrid PPAs as an important component in meeting the growing green-electricity requirements of its SALCOS transformation.

MetalMate analysis
KEY DETAILS
  • Two projects: 147 MW of solar capacity.
  • Battery storage: 79 MW of power and 237 MWh of energy capacity.
  • Contracted solar supply: 158 GWh per year.
  • Zelestra will build and own the plants; Salzgitter Flachstahl will purchase the electricity and control storage operations.
  • Salzgitter AG says the batteries will use only surplus solar electricity from the associated plants.
WHAT TO WATCH

Watch for disclosure of construction and commissioning schedules, contract duration, investment value and expected battery throughput, which were not specified in the supplied information. Project execution and the storage systems’ operating profile will determine how effectively the arrangement supports SALCOS electricity requirements.

Source & methodology +

MetalMate separates original-source evidence from summary and analysis. Verify the original source before procurement, legal or engineering decisions.

Article status
Updated · Version 3
Source date
Not supplied
MetalMate publication
23 September 2026
Verification
Automated evidence checks; not human reviewed

Salzgitter Flaschstal and Zelestra sign largest hybrid solar-plus-energy-storage contract in Germany to supply green electricity for low-carbon steel production — Salzgitter AG

Salzgitter Flachstahl and Zelestra sign largest hybrid solar-plus-energy-storage contract in Germany to supply green electricity for low-carbon steel production — Salzgitter AG
MetalMate provides an English summary; consult the original wording.